Holocene forearc block rotation in response to seamount subduction, southeastern Península de Nicoya, Costa Rica
2001; Geological Society of America; Volume: 29; Issue: 2 Linguagem: Inglês
10.1130/0091-7613(2001)029 2.0.co;2
ISSN1943-2682
AutoresThomas W. Gardner, Jeffrey S. Marshall, Dorothy J. Merritts, Bhavani Bee, Reed J. Burgette, Emily Burton, Jennifer Cooke, Natalie Kehrwald, Marino Protti, Donald M. Fisher, Peter B. Sak,
Tópico(s)Geological and Tectonic Studies in Latin America
ResumoResearch Article| February 01, 2001 Holocene forearc block rotation in response to seamount subduction, southeastern Península de Nicoya, Costa Rica Thomas Gardner; Thomas Gardner 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Search for other works by this author on: GSW Google Scholar Jeffrey Marshall; Jeffrey Marshall 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Search for other works by this author on: GSW Google Scholar Dorothy Merritts; Dorothy Merritts 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Search for other works by this author on: GSW Google Scholar Bhavani Bee; Bhavani Bee 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Search for other works by this author on: GSW Google Scholar Reed Burgette; Reed Burgette 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Search for other works by this author on: GSW Google Scholar Emily Burton; Emily Burton 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Search for other works by this author on: GSW Google Scholar Jennifer Cooke; Jennifer Cooke 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Search for other works by this author on: GSW Google Scholar Natalie Kehrwald; Natalie Kehrwald 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Search for other works by this author on: GSW Google Scholar Marino Protti; Marino Protti 2Observatorio Vulcanológico y Sismológico de Costa Rica, Apartado 86-3000, Universidad Nacional, Heredia, Costa Rica Search for other works by this author on: GSW Google Scholar Donald Fisher; Donald Fisher 3Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802, USA Search for other works by this author on: GSW Google Scholar Peter Sak Peter Sak 3Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Thomas Gardner 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Jeffrey Marshall 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Dorothy Merritts 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Bhavani Bee 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Reed Burgette 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Emily Burton 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Jennifer Cooke 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Natalie Kehrwald 1Keck Geology Consortium, Carleton College, Northfield, Minnesota 55057, USA Marino Protti 2Observatorio Vulcanológico y Sismológico de Costa Rica, Apartado 86-3000, Universidad Nacional, Heredia, Costa Rica Donald Fisher 3Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802, USA Peter Sak 3Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802, USA Publisher: Geological Society of America Received: 05 Jun 2000 Revision Received: 31 Oct 2000 Accepted: 05 Nov 2000 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (2): 151–154. https://doi.org/10.1130/0091-7613(2001)029 2.0.CO;2 Article history Received: 05 Jun 2000 Revision Received: 31 Oct 2000 Accepted: 05 Nov 2000 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Thomas Gardner, Jeffrey Marshall, Dorothy Merritts, Bhavani Bee, Reed Burgette, Emily Burton, Jennifer Cooke, Natalie Kehrwald, Marino Protti, Donald Fisher, Peter Sak; Holocene forearc block rotation in response to seamount subduction, southeastern Península de Nicoya, Costa Rica. Geology 2001;; 29 (2): 151–154. doi: https://doi.org/10.1130/0091-7613(2001)029 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The southeastern tip of the Península de Nicoya, Costa Rica, on the Caribbean plate margin lies inboard of the rough bathymetric terrain on the subducting Cocos plate and along the landward projection of the convergence vector for the Fisher seamount group. The southern tip of the peninsula has nearly orthogonal coastlines and extensive, well-preserved, Holocene marine terraces, and is ideally situated to evaluate the spatial distribution of forearc deformation in response to seamount subduction.Two marine terraces that yielded 35 radiocarbon dates give information on the rates, style, and timing of deformation along 40 km of coastline. Ages range from 3.5 to 7.4 ka for a higher terrace and from 0.3 to 2.9 ka for a lower terrace. A maximum uplift rate is ∼6.0 m/k.y. along the southeastern tip of the peninsula. Uplift rates decrease linearly to <1.0 m/k.y. along both orthogonal coastlines and thus landward from the Middle America Trench and away from the line of subducting seamounts. The ∼400 km2 region along the tip of the peninsula can be approximated as a rotating block with an angular rotation rate of 0.02°/k.y. about an axis with an azimuth of 80°. Given the modern elevation and dip of the late Quaternary Cobano surface, this style of deformation is limited to a duration of 100–200 k.y. Deformation is occurring in response to seamount bypass or underplating onto the Caribbean plate margin. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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