@booklet {Harders2014,
	title = {{Characterization of Submarine Landslide Complexes Offshore Costa Rica: An Evolutionary Model Related to Seamount Subduction}},
	year = {2014},
	month = {dec},
	publisher = {Springer International Publishing},
	abstract = {Offshore Costa Rica large seamounts under-thrust the continental convergent margin causing slides of complex morphology. The large dimension of the structures has attracted previous investigations and their basic characteristics are known. However, no detailed mapping of their complex morphology has been reported. Here we present a detailed mapping of the failure-related structures and deposits. We use deep-towed sidescan sonar data, aided by multibeam bathymetry to analyze their geometry, geomorphologic character, backscatter intensity, and spatial distribution. Those observations are used to analyze the relationship between landslide characteristics and abundance, to the changes in the style of deformation caused by the subduction of seamounts to progressively greater depth under the margin.},
	isbn = {10.1007/978-3-319-00972-8\_34},
	doi = {10.1007/978-3-319-00972-8\_34 <http://dx.doi.org/10.1007/978-3-319-00972-8\_34>.},
	url = {http://oceanrep.geomar.de/22515/},
	author = {Harders, Rieka and Weinrebe, Wilhelm and Ranero, Cesar R.}
}
@article {Arroyo2014,
	title = {{Interplate seismicity at the CRISP drilling site: The 2002 Mw 6.4 Osa Earthquake at the southeastern end of the Middle America Trench}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {15},
	number = {7},
	year = {2014},
	pages = {3035{\textendash}3050},
	publisher = {Blackwell Publishing Ltd},
	abstract = {We investigate potential relations between variations in seafloor relief and age of the incoming plate and interplate seismicity. Westward from Osa Peninsula in Costa Rica, a major change in the character of the incoming Cocos Plate is displayed by abrupt lateral variations in seafloor depth and thermal structure. Here a Mw 6.4 thrust earthquake was followed by three aftershock clusters in June 2002. Initial relocations indicate that the main shock occurred fairly trenchward of most large earthquakes along the Middle America Trench off central Costa Rica. The earthquake sequence occurred while a temporary network of OBH and land stations \~{}80 km to the northwest were deployed. By adding readings from permanent local stations, we obtain uncommon P wave coverage of a large subduction zone earthquake. We relocate this catalog using a nonlinear probabilistic approach within both, a 1-D and a 3-D P wave velocity models. The main shock occurred \~{}25 km from the trench and probably along the plate interface at 5-10 km depth. We analyze teleseismic data to further constrain the rupture process of the main shock. The best depth estimates indicate that most of the seismic energy was radiated at shallow depth below the continental slope, supporting the nucleation of the Osa earthquake at \~{}6 km depth. The location and depth coincide with the plate boundary imaged in prestack depth-migrated reflection lines shot near the nucleation area. Aftershocks propagated downdip to the area of a 1999 Mw 6.9 sequence and partially overlapped it. The results indicate that underthrusting of the young and buoyant Cocos Ridge has created conditions for interplate seismogenesis shallower and closer to the trench axis than elsewhere along the central Costa Rica margin. {\textcopyright} 2014. American Geophysical Union. All Rights Reserved.},
	keywords = {earthquake relocation, erosional margin, interplate drilling},
	issn = {15252027},
	doi = {10.1002/2014GC005359},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84906266765\&partnerID=tZOtx3y1},
	author = {Arroyo, Ivonne G. and Grevemeyer, Ingo and Ranero, Cesar R. and von Huene, Roland}
}
@booklet {Ranero2014,
	title = {{The Western Mediterranean Pairs of Basin and Arc Systems}},
	year = {2014},
	month = {feb},
	publisher = {Sociedad Geol{\'o}gica de Espa{\~n}a},
	abstract = {Ranero, C{\'e}sar R. ... et. al.{\textendash} VIII Congreso Geol{\'o}gico de Espa{\~n}a, 2012, Oviedo},
	isbn = {http://hdl.handle.net/10261/92021},
	url = {http://digital.csic.es/handle/10261/92021},
	author = {Ranero, Cesar R. and Gr{\'a}cia, Eul{\`a}lia and Sallares, Valenti and Garcia, Xavier and Gallart Muset, Josep and Bartolom{\'e}, Rafael and Lo Iacono, Claudio and Martinez-Loriente, S. and Moreno, Ximena and Prada, Manel and Perea, Hector and Zitellini, N.}
}
@article {Cameselle2013a,
	title = {{The continent-ocean transition of the Pearl River margin}},
	journal = {AGU Fall Meeting Abstracts},
	volume = {-1},
	year = {2013},
	month = {dec},
	pages = {06},
	abstract = {Rifted continental margins form by lithospheric extension and break-up. The continent to ocean transition (COT) architecture depends on the interplay between tectonic and magmatic processes, and thus, to study the COT variability of different systems is key to understand rifting. We use MCS data and magnetic lineations across the Pearl River margin (PRM) of South China Sea to investigate a previously poorly defined COT. The structure of the PRM presents different amounts of extension allowing the study of conjugate pairs of continental margins and their COT in a relative small region. We reprocessed about 2250 km of MCS data along 4 regional, crustal-scale lines and found that 3 of them possibly display the COT. The time-migrated seismic sections show differences in internal reflectivity, faulting style, fault-block geometry, the seismic character of the top of the basement, in the geometry of sediment deposits, and Moho reflections, that we interpret to represent clear continental and oceanic domains. The continental domain is characterized by arrays of normal faults and associated tilted blocks overlaid by syn-rift sedimentary units. The Moho is imaged as sub-horizontal reflections that define a fairly continuous boundary typically at 8-10 s TWT. Estimation of the thickness of the continental crust using 6 km/s average velocity indicates a \~{}22 km-thick continental crust under the uppermost slope passing abruptly to \~{}9-6 km under the lower slope. Comparatively the oceanic crust has a highly reflective top of basement, little-faulting, not discernible syn-tectonic strata, and fairly constant thick aness (4-8 km) defined by usually clear Moho reflections. The COT occurs across \~{}5-10 km narrow zone. Rifting resulted in asymmetric conjugate margins. The PRM shows arrays of tilted fault blocks covered by abundant syn-rift sediment, whereas the conjugate Macclesfield Bank margin displays abrupt thinning and little faulting. Seismic profiles also show a change in the tectonic structure from NE to SW. On the two NE- most lines, crustal thinning and break-up occur over 20-40 km wide segments. To the SW, continental extension occurred over a comparatively broader \~{}100-110 km segment of tilted fault-block structure. We interpret, that this 3D structural variability and the narrow COT was caused by the lateral NE to the SW propagation of a spreading center. In the NE, early spreading center propagation during ongoing rifting stopped continental stretching, causing an abrupt break-up and a narrow COT to seafloor spreading. Later arrival of spreading center propagated to the SW, resulted in a comparatively broader segment with fault-block structures of extended continental crust. However, the COT to clear oceanic crust is narrow. Spreading center propagation in the basin is however not a simple phenomena and ridge jumps and abrupt cessation of spreading contributed to form narrow COT that laterally change to highly thinned continental crust segments. We suggest that the tectonic architecture of continental extension and the abrupt COT along the PRM have been controlled by 3D oceanic spreading center propagation to a degree larger than by the local lithospheric structure during rifting.},
	keywords = {8105 TECTONOPHYSICS Continental margins: divergent},
	url = {http://adsabs.harvard.edu/abs/2013AGUFMOS23E..06C},
	author = {Cameselle, Alejandra L. and Ranero, Cesar R. and Franke, Dieter and Barckhausen, Udo}
}
@article {Kluesner2013,
	title = {{High density of structurally controlled, shallow to deep water fluid seep indicators imaged offshore Costa Rica}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {14},
	number = {3},
	year = {2013},
	month = {mar},
	pages = {519{\textendash}539},
	abstract = {We used high-resolution mapping to document 161 sites of potential fluid seepage on the shelf and slope regions where no geophysical seep indicators had been reported. Identified potential seabed seepage sites show both high-backscatter anomalies and bathymetric expressions, such as pockmarks, mounds, and ridges. Almost all identified seabed features are associated with bright spots and flat spots beneath, as mapped within the 3-D seismic grid. We obtained EM122 multi-beam data using closely spaced receiver beams and 4-5 times overlapping multi-beam swaths, which greatly improved the sounding density and geologic resolvability of the data. At least one location shows an acoustic plume in the water column on a 3.5 kHz profile, and this plume is located along a fault trace and above surface and subsurface seepage indicators. Fluid indicators are largely associated with folds and faults within the sediment section, and many of the faults continue into and offset the reflective basement. A dense pattern of normal faults is seen on the outer shelf in the multi-beam bathymetry, backscatter, and 3-D seismic data, and the majority of fluid seepage indicators lie along mapped fault traces. Furthermore, linear mounds, ridges, and pockmark chains are found on the upper, middle, and lower slope regions. The arcuate shape of the shelf edge, projection of the Quepos Ridge, and high density of potential seep sites suggest that this area may be a zone of former seamount/ridge subduction. These results demonstrate a much greater potential seep density and distribution than previously reported across the Costa Rican margin. {\textcopyright}2013. American Geophysical Union. All Rights Reserved.},
	keywords = {Costa Rica, fluid flow, fluid seepage, Marine Geology and Geophysics, subduction zones},
	issn = {15252027},
	doi = {10.1002/ggge.20058},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84879641763\&partnerID=tZOtx3y1},
	author = {Kluesner, Jared W. and Silver, Eli A. and Bangs, Nathan L. and McIntosh, Kirk D. and Gibson, James and Orange, Daniel and Ranero, Cesar R. and von Huene, Roland}
}
@article {Sallares2013a,
	title = {{Overriding plate structure of the Nicaragua convergent margin: Relationship to the seismogenic zone of the 1992 tsunami earthquake}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {14},
	number = {9},
	year = {2013},
	month = {sep},
	pages = {3436{\textendash}3461},
	abstract = {We present 2-D seismic velocity models and coincident multichannel seismic reflection images of the overriding plate and the inter-plate boundary of the Nicaragua convergent margin along two wide-angle seismic profiles parallel and normal to the trench acquired in the rupture area of the 1992 tsunami earthquake. The trench-perpendicular profile runs over a seamount subducting under the margin slope, at the location where seismological observations predict large coseismic slip. Along this profile, the igneous basement shows increasing velocity both with depth and away from the trench, reflecting a progressive decrease in upper-plate rock degree of fracturing. Upper mantle-like velocities are obtained at \~{}10 km depth beneath the fore-arc Sandino basin, indicating a shallow mantle wedge. A mismatch of the inter-plate reflector in the velocity models and along coincident multichannel seismic profiles under the slope is best explained by \~{}15\% velocity anisotropy, probably caused by subvertical open fractures that may be related to fluid paths feeding known seafloor seepage sites. The presence of a shallow, partially serpentinized mantle wedge, and the fracture-related anisotropy are supported by gravity analysis of velocity-derived density models. The downdip limit of inter-plate seismicity occurs near the tip of the inferred mantle wedge, suggesting that seismicity could be controlled by the presence of serpentinite group minerals at the fault gouge. Near the trench, the inferred local increase of normal stress produced by the subducting seamount in the plate boundary may have made this fault segment unstable during earthquake rupture, which could explain its tsunamigenic character. {\textcopyright} 2013. American Geophysical Union. All Rights Reserved.},
	keywords = {Convergent margin, travel time tomography, tsunami earthquake, wide-angle seismics},
	issn = {15252027},
	doi = {10.1002/ggge.20214},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84886671506\&partnerID=tZOtx3y1},
	author = {Sallares, Valenti and Mel{\'e}ndez, Adri{\`a} and Prada, Manuel and Ranero, Cesar R. and McIntosh, Kirk and Grevemeyer, Ingo}
}
@inbook {Harders2012,
	title = {{An overview of the role of long-term tectonics and incoming plate structure on segmentation of submarine mass wasting phenomena along the Middle America Trench.}},
	booktitle = {Submarine Mass Movements and Their Consequences - 5th International Symposium},
	year = {2012},
	pages = {391{\textendash}402},
	publisher = {Springer Netherlands},
	organization = {Springer Netherlands},
	address = {Dordrecht},
	abstract = {We study mass wasting along the Middle America Trench (MAT), a subduction zone dominated by tectonic erosion, using a comprehensive data set of seafloor relief. We integrate previous studies of long- Term tectonic processes to analyze how they influence the evolution of the slope structure and precondition the continental slope for mass wasting. We have used the distribution of an inventory of 147 slope failure structures along the MAT to discuss their relation to subduction erosion. We interpret that preconditioning of the slope by long- Term tectonics, interacts in a shorter- Term scale with features on the under- Thrusting oceanic plate to modulate the abundance and types of mass wasting phenomena. The complex origin of the incoming oceanic plate has produced abrupt lateral changes in plate age, crustal thickness, relief, and response to bending deformation at the trench, leading to its partitioning into six segments. We found that the continental-slope failure style and abundance are partitioned into six segments that spatially match the ocean plate segments. {\textcopyright} Springer Science+Business Media B.V. 2012.},
	keywords = {Convergent margin, Subduction erosion, Submarine landslide},
	isbn = {978-94-007-2161-6},
	doi = {10.1007/978-94-007-2162-3},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84904112373\&partnerID=tZOtx3y1},
	author = {Harders, Rieka and Ranero, Cesar R. and Weinrebe, Wilhelm},
	editor = {Yamada, Yasuhiro and Kawamura, Kiichiro and Ikehara, Ken and Ogawa, Yujiro and Urgeles, Roger and Mosher, David and Chaytor, Jason and Strasser, Michael}
}
@article {Geersen2011,
	title = {{Active tectonics of the South Chilean marine fore arc (35{\textdegree}S-40{\textdegree}S)}},
	journal = {Tectonics},
	volume = {30},
	number = {3},
	year = {2011},
	month = {jun},
	pages = {n/a{\textendash}n/a},
	abstract = {The South Chilean marine fore arc (35{\textdegree}S-40{\textdegree}S) is separated into four tectonic segments, Concepci{\'o}n North, Concepci{\'o}n South, Nahuelbuta, and Tolten (from north to south). These are each characterized by their individual tectonic geomorphology and reflect different ways of mechanical and kinematic interaction of the convergent Nazca and South American plates. Splay faults that cut through continental framework rock are seismically imaged in both Concepci{\'o}n segments and the Tolten Segment. Additionally, the Concepci{\'o}n South Segment exhibits prominent upper plate normal faults. Normal faults apparently relate to uplift caused by sediment underthrusting at depth. This has led to oversteepening and gravitational collapse of the marine fore arc. There is also evidence for sediment underthrusting and basal accretion to the overriding plate in the Tolten Segment. There, uplift of the continental slope has created a landward inclined seafloor over a latitudinal distance of 50 km. In the Nahuelbuta Segment transpressive upper plate faults, aligned oblique to the direction of plate motion, control the seafloor morphology. Based on a unique acoustic data set including >90\% of bathymetric coverage of the continental slope we are able to reveal an along-strike heterogeneity of a complexly deformed marine fore arc which had escaped attention in previous studies that only considered the structure along transects normal to the plate margin. Copyright 2011 by the American Geophysical Union.},
	issn = {02787407},
	doi = {10.1029/2010TC002777},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79958808106\&partnerID=tZOtx3y1},
	author = {Geersen, Jacob and Behrmann, Jan H. and V{\"o}lker, David and Krastel, Sebastian and Ranero, Cesar R. and Diaz-Naveas, Juan and Weinrebe, Wilhelm}
}
@article {Harders2011,
	title = {{Submarine slope failures along the convergent continental margin of the Middle America Trench}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {12},
	number = {6},
	year = {2011},
	month = {jun},
	pages = {n/a{\textendash}n/a},
	abstract = {We present the first comprehensive study of mass wasting processes in the continental slope of a convergent margin of a subduction zone where tectonic processes are dominated by subduction erosion. We have used multibeam bathymetry along \~{}1300 km of the Middle America Trench of the Central America Subduction Zone and deep-towed side-scan sonar data. We found abundant evidence of large-scale slope failures that were mostly previously unmapped. The features are classified into a variety of slope failure types, creating an inventory of 147 slope failure structures. Their type distribution and abundance define a segmentation of the continental slope in six sectors. The segmentation in slope stability processes does not appear to be related to slope preconditioning due to changes in physical properties of sediment, presence/absence of gas hydrates, or apparent changes in the hydrogeological system. The segmentation appears to be better explained by changes in slope preconditioning due to variations in tectonic processes. The region is an optimal setting to study how tectonic processes related to variations in intensity of subduction erosion and changes in relief of the underthrusting plate affect mass wasting processes of the continental slope. The largest slope failures occur offshore Costa Rica. There, subducting ridges and seamounts produce failures with up to hundreds of meters high headwalls, with detachment planes that penetrate deep into the continental margin, in some cases reaching the plate boundary. Offshore northern Costa Rica a smooth oceanic seafloor underthrusts the least disturbed continental slope. Offshore Nicaragua, the ocean plate is ornamented with smaller seamounts and horst and graben topography of variable intensity. Here mass wasting structures are numerous and comparatively smaller, but when combined, they affect a large part of the margin segment. Farther north, offshore El Salvador and Guatemala the downgoing plate has no large seamounts but well-defined horst and graben topography. Off El Salvador slope failure is least developed and mainly occurs in the uppermost continental slope at canyon walls. Off Guatemala mass wasting is abundant and possibly related to normal faulting across the slope. Collapse in the wake of subducting ocean plate topography is a likely failure trigger of slumps. Rapid oversteepening above subducting relief may trigger translational slides in the middle Nicaraguan upper Costa Rican slope. Earthquake shaking may be a trigger, but we interpret that slope failure rate is lower than recurrence time of large earthquakes in the region. Generally, our analysis indicates that the importance of mass wasting processes in the evolution of margins dominated by subduction erosion and its role in sediment dynamics may have been previously underestimated. Copyright 2011 by the American Geophysical Union.},
	keywords = {Convergent margin, landslides, slope failure, Subduction erosion, submarine mass wasting, tectonics},
	issn = {15252027},
	doi = {10.1029/2010GC003401},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79959701829\&partnerID=tZOtx3y1},
	author = {Harders, Rieka and Ranero, Cesar R. and Weinrebe, Wilhelm and Behrmann, Jan H.}
}
@article {Dannowski2010,
	title = {{Seismic structure of an oceanic core complex at the Mid-Atlantic Ridge, 22{\textdegree}19'N}},
	journal = {Journal of Geophysical Research},
	volume = {115},
	number = {B7},
	year = {2010},
	month = {jul},
	pages = {B07106},
	abstract = {We present results from a seismic refraction and wide-angle experiment surveying an oceanic core complex on the Mid-Atlantic Ridge at 2219N. Oceanic core complexes are settings where petrological sampling found exposed lower crustal and upper mantle rocks, exhumed by asymmetric crustal accretion involving detachment faulting at magmatically starved ridge sections. Tomographic inversion of our seismic data yielded lateral variations of P wave velocity within the upper 3 to 4 km of the lithosphere across the median valley. A joint modeling procedure of seismic P wave travel times and marine gravity field data was used to constrain crustal thickness variations and the structure of the uppermost mantle. A gradual increase of seismic velocities from the median valley to the east is connected to aging of the oceanic crust, while a rapid change of seismic velocities at the western ridge flank indicates profound differences in lithology between conjugated ridge flanks, caused by un-roofing lower crust rocks. Under the core complex crust is approximately 40\% thinner than in the median valley and under the conjugated eastern flank. Clear PmP reflections turning under the western ridge flank suggest the creation of a Moho boundary and hence continuous magmatic accretion during core complex formation.Copyright 2010 by the American Geophysical Union.},
	issn = {0148-0227},
	doi = {10.1029/2009JB006943},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77955209693\&partnerID=tZOtx3y1},
	author = {Dannowski, Anke and Grevemeyer, Ingo and Ranero, Cesar R. and Ceuleneer, Georges and Maia, Marcia and Morgan, Jason Phipps and Gente, Pascal}
}
@article {Harris2010a,
	title = {{Thermal regime of the Costa Rican convergent margin: 1. Along-strike variations in heat flow from probe measurements and estimated from bottom-simulating reflectors}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {11},
	number = {12},
	year = {2010},
	month = {dec},
	pages = {n/a{\textendash}n/a},
	abstract = {The thermal structure of convergent margins provides information related to the tectonics, geodynamics, metamorphism, and fluid flow of active plate boundaries. We report 176 heat flow measurements made with a violin bow style probe across the Costa Rican margin at the Middle America Trench. The probe measurements are collocated with seismic reflection lines. These seismic reflection lines show widespread distribution of bottom-simulating reflectors (BSRs). To extend the spatial coverage of heat flow measurements we estimate heat flow from the depth of BSRs. Comparisons between probe measurements and BSR-derived estimates of heat flow are generally within 10\% and improve with distance landward of the deformation front. Together, these determinations provide new information on the thermal regime of this margin. Consistent with previous studies, the margin associated with the northern Nicoya Peninsula is remarkably cool. We define better the southern boundary of the cool region. The northern extent of the cool region remains poorly determined. A regional trend of decreasing heat flow landward of the deformation front is apparent, consistent with the downward advection of heat by the subducting Cocos Plate. High wave number variability at a scale of 5-10 km is significantly greater than the measurement uncertainty and is greater south of the northern Nicoya Peninsula. These heat flow anomalies vary between approximately 20 and 60 mW m-2 and are most likely due to localized fluid flow through mounds and faults on the margin. Simple one-dimensional models show that these anomalies are consistent with flow rates of 7-15 mm yr-1. Across the margin toe variability is significant and likely due to fluid flow through deformation structures associated with the frontal sedimentary prism. Copyright 2010 by the American Geophysical Union.},
	keywords = {fluid flow, heat flow, Middle America Trench, subduction zones},
	issn = {15252027},
	doi = {10.1029/2010GC003272},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-78650544794\&partnerID=tZOtx3y1},
	author = {Harris, Robert N. and Grevemeyer, Ingo and Ranero, Cesar R. and Villinger, Heinrich and Barckhausen, Udo and Henke, Thomas and Mueller, Christian and Neben, Soenke}
}
@article {Harris2010,
	title = {{Thermal regime of the Costa Rican convergent margin: 2. Thermal models of the shallow Middle America subduction zone offshore Costa Rica}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {11},
	number = {12},
	year = {2010},
	month = {dec},
	pages = {n/a{\textendash}n/a},
	abstract = {At the Costa Rica margin along the Middle America Trench along-strike variations in heat flow are well mapped. These variations can be understood in terms of either ventilated fluid flow, where exposed basement allows fluids to freely advect heat between the crustal aquifer and ocean, or insulated fluid flow where continuous sediment cover restricts heat advection to within the crustal aquifer. We model fluid flow within the subducting aquifer using Nusselt number approximations coupled with finite element models of subduction and explore its effect on temperatures along the subduction thrust. The sensitivity of these models to the initial thermal state of the plate and styles of fluid flow, either ventilated or insulated, is explored. Heat flow measurements on cool crust accreted at the East Pacific Rise are consistent with ventilated hydrothermal cooling that continues with subduction. These models yield much cooler temperatures than predicted from simulations initialized with conductive predictions and without hydrothermal circulation. Heat flow transects on warm crust accreted at the Cocos-Nazca spreading center are consistent with models of insulated hydrothermal circulation that advects heat updip within the subducting crustal aquifer. Near the trench these models are warmer than conductive predictions and cooler than conductive predictions downdip of the trench. Comparisons between microseismicity and modeled isotherms suggest that the updip limit of microseismicity occurs at temperatures warmer than 100{\textdegree}C and that the downdip extent of microseismicity is bounded by the intersection of the subduction thrust with the base of the overriding crust. Copyright 2010 by the American Geophysical Union.},
	keywords = {fluid flow, subduction zones, thermal model},
	issn = {15252027},
	doi = {10.1029/2010GC003273},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-78650528793\&partnerID=tZOtx3y1},
	author = {Harris, Robert N. and Spinelli, Glenn and Ranero, Cesar R. and Grevemeyer, Ingo and Villinger, Heinrich and Barckhausen, Udo}
}
@article {Petersen2009,
	title = {{Fluid seepage and mound formation offshore Costa Rica revealed by deep-towed sidescan sonar and sub-bottom profiler data}},
	journal = {Marine Geology},
	volume = {266},
	number = {1-4},
	year = {2009},
	month = {oct},
	pages = {172{\textendash}181},
	abstract = {Our analysis of geoacoustic data from the Middle American margin provides an insight into the formation and evolution mechanisms of mound structures observed on the continental slope offshore Costa Rica. Based on high-resolution deep-towed sidescan sonar and sub-bottom profiler (SBP) data six different mound and fluid seepage structures at the Hongo mound field are characterized in detail. The Hongo mound field is located on the lower continental slope offshore Nicoya peninsula in the prolongation of the subducting Nicoya fracture zone. The mounds have oval to circular shapes with diameters of 500-1600 m and relief heights of 60-100 m. High backscatter anomalies near the mound summits indicate carbonate precipitation and focused fluid seepage activity within the last 10 ka. The data do not show evidence for mud extrusions and the structures were probably formed by a combination of carbonate precipitation and mud diapirism. Based on seismic stratigraphy analysis, mud diapirism is at least active since 42.5-57 ka and average vertical growth rates vary between 6-24 cm/ka. However, if diapirism represents the dominant mound evolution mechanism, mound heights of 80 m point to much older mound ages of 330-1330 ka. {\textcopyright} 2009 Elsevier B.V. All rights reserved.},
	keywords = {carbonate, deep-towed side-scan sonar, fluid seepage, mound, mud diapir, sub-bottom profiler},
	issn = {00253227},
	doi = {10.1016/j.margeo.2009.08.004},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-72049084256\&partnerID=tZOtx3y1},
	author = {Petersen, Carl J{\"o}rg and Klaucke, Ingo and Weinrebe, Wilhelm and Ranero, Cesar R.}
}
@book {VonHuene2009a,
	title = {{Subduction Zone Geodynamics}},
	series = {Frontiers in Earth Sciences},
	year = {2009},
	month = {oct},
	publisher = {Springer Berlin Heidelberg},
	organization = {Springer Berlin Heidelberg},
	address = {Berlin, Heidelberg},
	abstract = {21 pages, 8 figures, 1 table},
	keywords = {Accretion, Convergent margins, Subduction erosion},
	isbn = {978-3-540-87971-8},
	doi = {10.1007/978-3-540-87974-9},
	url = {http://digital.csic.es/handle/10261/83778 http://hdl.handle.net/10261/83778},
	author = {von Huene, Roland and Ranero, Cesar R. and Scholl, Dave W.},
	editor = {Lallemand, Serge and Funiciello, Francesca}
}
@article {Barckhausen2008,
	title = {{Birth of an intraoceanic spreading center}},
	journal = {Geology},
	volume = {36},
	number = {10},
	year = {2008},
	pages = {767},
	abstract = {The Cocos-Nazca spreading center is one of the few examples of the formation of a spreading center by splitting of oceanic lithosphere. It was created when the Farallon plate, broke up in the early Miocene following the collision of the Pacific-Farallon spreading center with the North American continent. Much of the ancient Farallon plate corresponding to the area of opening is lost to subduction beneath Central America and South America, but new data from the conjugate area on the Pacific plate allow the first detailed reconstruction of the break-up process. The opening began after chron 7 (25 Ma) at a location of focused crustal extension caused by overlapping spreading centers that had evolved in response to a slight reorientation of a Pacific-Farallon ridge segment. Beginning at chron 6B (22.7 Ma), eastward progressing seafloor spreading started along an axis that most likely migrated toward the region of weak lithosphere created by the Galapagos hotspot. By chron 6 (19.5 Ma), plate splitting from the spreading center to the trench was complete, allowing the fully detached Cocos and Nazca plates to move independently. This kinematic change resulted in a significant ridge jump of the newly established Pacific-Nazca spreading center, a change in plate motion direction of the Nazca plate by 20{\textdegree}clockwise, and a large increase in Pacific-Cocos plate velocity in the middle Miocene. {\textcopyright} 2008 The Geological Society of America.},
	keywords = {Central Pacific, Farallon breakup, Galapagos hotspot, Magnetic anomalies},
	issn = {0091-7613},
	doi = {10.1130/G25056A.1},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-54949104690\&partnerID=tZOtx3y1},
	author = {Barckhausen, Udo and Ranero, Cesar R. and Cande, Steven C. and Engels, Martin and Weinrebe, Wilhelm}
}
@article {Sahling2008,
	title = {{Fluid seepage at the continental margin offshore Costa Rica and southern Nicaragua}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {9},
	number = {5},
	year = {2008},
	month = {may},
	pages = {n/a{\textendash}n/a},
	abstract = {A systematic search for methane-rich fluid seeps at the seafloor was conducted at the Pacific continental margin offshore southern Nicaragua and northern central Costa Rica, a convergent margin characterized by subduction erosion. More than 100 fluid seeps were discovered using a combination of multibeam bathymetry, side-scan sonar imagery, TV-sled observations, and sampling. This corresponds, on average, to a seep site every 4 km along the continental slope. In the northwestern part of the study area, subduction of oceanic crust formed at the East Pacific Rise is characterized by pervasive bending-induced faulting of the oceanic plate and a relatively uniform morphology of the overriding continental margin. Seepage at this part of the margin typically occurs at approximately cone-shaped mounds 50 - 100 m high and up to 1 km wide at the base. Over 60 such mounds were identified on the 240 km long margin segment. Some normal faults also host localized seepage. In contrast, in the southeast, the 220 km long margin segment overriding the oceanic crust formed at the Cocos-Nazca Spreading Centre has a comparatively more irregular morphology caused mainly by the subduction of ridges and seamounts sitting on the oceanic plate. Over 40 seeps were located on this part of the margin. This margin segment with irregular morphology exhibits diverse seep structures. Seeps are related to landslide scars, seamountsubduction related fractures, mounds, and faults. Several backscatter anomalies in side-scan images are without apparent relief and are probably related to carbonate precipitation. Detected fluid seeps are not evenly distributed across the margin but occur in a roughly margin parallel band centered 28 {\textpm} 7 km landward of the trench. This distribution suggests that seeps are possibly fed to fluids rising from the plate boundary along deep-penetrating faults through the upper plate. Copyrignt 2008 by the American Geophysical Union.},
	keywords = {Authigenic carbonate, Chemosynthetic community, Subduction erosion},
	issn = {15252027},
	doi = {10.1029/2008GC001978},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-70350099584\&partnerID=tZOtx3y1},
	author = {Sahling, Heiko and Masson, Douglas G. and Ranero, Cesar R. and H{\"u}hnerbach, Veit and Weinrebe, Wilhelm and Klaucke, Ingo and B{\"u}rk, Dietmar and Br{\"u}ckmann, Warner and Suess, Erwin}
}
@article {Klaucke2008,
	title = {{Multifrequency geoacoustic imaging of fluid escape structures offshore Costa Rica: Implications for the quantification of seep processes}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {9},
	number = {4},
	year = {2008},
	month = {apr},
	pages = {n/a{\textendash}n/a},
	abstract = {Quantification of fluid fluxes from cold seeps depends on accurate estimates of the spatial validity of flux measurements. These estimates are strongly influenced by the choice of geoacoustic mapping tools. Multibeam bathymetry, side-scan sonar, and Chirp subbottom profiler data of several mound-shaped cold seeps offshore central Costa Rica show great variety in morphology and structure although the features are only a few kilometers apart. Mound 11 (a 35 m high and 1000 m in diameter structure), situated in the SE of the study area, has an irregular morphology but a smooth surface on side-scan sonar data, while mound 12 (30 m high, 600 m across) is a cone of more regular outline but with a rough surface, and mound Grillo (5 m high, 500 m across) shows the same rough surface as mound 12 but without relief. Video observations and sediment cores indicate that the structures are formed by the precipitation of authigenic carbonates and indications for extensive mud extrusion are absent, except for one possible mudflow at mound 11. Different sonar frequencies result in variable estimates of the extent of these mounds with low frequencies suggesting much wider cold seeps, consequently overestimating fluid fluxes. The absence of mud volcanism compared to accretionary prisms where mud volcanism occurs is related to different tectonic styles: strong sediment overpressure and thrust faulting in typical accretionary prisms can generate mud volcanism, while subduction erosion and normal faulting (extension) of the overriding plate at the Costa Rican margin result in fluid venting driven by only slight fluid overpressures. Copyright 2008 by the American Geophysical Union.},
	keywords = {Cold seeps, Costa Rica, Side-scan sonar},
	issn = {15252027},
	doi = {10.1029/2007GC001708},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-71749104881\&partnerID=tZOtx3y1},
	author = {Klaucke, Ingo and Masson, Douglas G. and Petersen, C. J{\"o}rg and Weinrebe, Wilhelm and Ranero, Cesar R.}
}
@article {Ranero2007,
	title = {{Drilling the Seismogenic Zone of an Erosinal Convergent Margin: IODP Costa Rica Seismogenesis Project CRISP}},
	journal = {Scientific Drilling},
	number = {Special, No. 1},
	year = {2007},
	month = {nov},
	pages = {51{\textendash}54},
	issn = {1816-3459},
	doi = {10.2204/iodp.sd.s01.29.2007},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-72749124634\&partnerID=tZOtx3y1},
	author = {Ranero, Cesar R. and Vannucchi, Paola and von Huene, Roland}
}
@article {Loreto2007,
	title = {{Evidence for fluid circulation, overpressure and tectonic style along the Southern Chilean margin}},
	journal = {Tectonophysics},
	volume = {429},
	number = {3-4},
	year = {2007},
	month = {jan},
	pages = {183{\textendash}200},
	abstract = {The southern Chilean convergent margin, between 50{\textdegree} and 57{\textdegree} S, is shaped by the interaction of the three main plates: Antarctic, South America and Scotia. North of 53{\textdegree} S, the convergence between Antarctic and South America plates is close to orthogonal to the continental margin strike. Here, the deformational style of the accretionary prism is mainly characterized by seaward-verging thrusts and locally by normal faults and fractures, a very limited lateral extension of prism, a very shallow dip (\~{} 6{\textdegree}) d{\'e}collement, and subduction of a thick and relatively undeformed trench sedimentary sequence. South of 53{\textdegree} S, convergence is oblique to the margin, locally, the trench sediments are proto-deformed by double vergence thrusting and the front of the prism grows through landward-verging thrusting. The d{\'e}collement is sub-horizontal and deep, involving most of the sediment over the oceanic crust in the accretionary process, building a comparatively wide and thicker prism. A Bottom Simulating Reflector is present across the whole prism to the abyssal plan, suggesting the presence of gas in the sediments. The analysis of P- and S-wave velocity reflectivity sections, derived by amplitude versus offset technique (AVO), detailed velocity information and the velocity-derived sediment porosity have been integrated with the structural analysis of the accretionary prism of two selected pre-stack depth migrated seismic lines, aiming to explain the relation between fluid circulation and tectonics. Accretion along double vergence thrust faults may be associated with the presence of overpressured fluid, which decreases the effective shear stress coefficient along the main d{\'e}collement and within the sediments, and modify the rheolgical properties of rocks. The presence of an adequate drainage network, represented by interconnected faults and fractures affecting the entire sedimentary sequence, can favour the escape of pore fluid toward the sea bottom, while, less permeable and not faulted sediments can favour fluid accumulations. Gravitational and tectonic dewatering, and stratigraphy could control the consolidation and the pore overpressure of sediments involved in subduction along the trench. The results of our analysis suggest the existence of a feedback between tectonic style and fluid circulation. {\textcopyright} 2006 Elsevier B.V. All rights reserved.},
	keywords = {Accretion, AVO, Back-thrust, Dewatering, Overpressure, subduction},
	issn = {00401951},
	doi = {10.1016/j.tecto.2006.09.016},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33845522651\&partnerID=tZOtx3y1},
	author = {Loreto, Maria Filomena and Tinivella, Umberta and Ranero, Cesar R.}
}
@article {Grevemeyer2007,
	title = {{Passive and active seismological study of bending-related faulting and mantle serpentinization at the Middle America trench}},
	journal = {Earth and Planetary Science Letters},
	volume = {258},
	number = {3-4},
	year = {2007},
	month = {jun},
	pages = {528{\textendash}542},
	abstract = {Water transported within the subducting oceanic lithosphere into the Earth{\textquoteright}s interior affects a wealth of subduction zone processes, including intraslab earthquakes and arc magmatism. In recent years growing evidence suggests that much of the hydration of oceanic plates occurs at the trench-ocean slope right before subduction. Here, normal faults are created while the rigid lithosphere bends into the trench. Offshore of Middle America, multi-channel seismic reflection imaging suggests that bending-related faults cut into the uppermost mantle, providing a mechanism for hydration and transformation of mantle peridotites into serpentinites. Seismic wide-angle reflection and refraction data were collected coincident with one of the seismic profiles where the faults have been imaged. Travel time inversion provides evidence that both crustal and uppermost mantle velocities are reduced with respect to the velocity structure found in mature oceanic crust away from deep-sea trenches. If mantle velocity reduction is solely produced by hydration, velocities indicate 10-15\% of serpentinization in the uppermost 3~km of the mantle, where seismic data provide enough resolution. A small network of ocean bottom hydrophones, deployed for about a month, detected \~{} 3 local micro earthquakes per day. Earthquake epicentres align with fault scarps at the seafloor and continuous earthquake activity might be an important process to facilitate the percolation of seawater into the upper mantle. {\textcopyright} 2007 Elsevier B.V. All rights reserved.},
	keywords = {bending-related normal faulting, earthquakes, global water cycle, seismic refraction, serpentinization, subduction},
	issn = {0012821X},
	doi = {10.1016/j.epsl.2007.04.013},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-34249911517\&partnerID=tZOtx3y1},
	author = {Grevemeyer, Ingo and Ranero, Cesar R. and Flueh, Ernst R. and Kl{\"a}schen, Dirk and Bialas, J{\"o}rg}
}
