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http://hdl.handle.net/10261/136916
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Campo DC | Valor | Lengua/Idioma |
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dc.contributor.author | Fernández, Francisco José | es_ES |
dc.contributor.author | Rodríguez, Indira | es_ES |
dc.contributor.author | Escuder Viruete, Javier | es_ES |
dc.contributor.author | Pérez-Estaún, Andrés | es_ES |
dc.date.accessioned | 2016-09-19T06:54:34Z | - |
dc.date.available | 2016-09-19T06:54:34Z | - |
dc.date.issued | 2016-08 | - |
dc.identifier.citation | Tectonophysics, 686: 116-131 (2016) | es_ES |
dc.identifier.issn | 0040-1951 | - |
dc.identifier.uri | http://hdl.handle.net/10261/136916 | - |
dc.description.abstract | Paleostress variations and microstructural imprints of a subducted carbonate slab record changes in mechanical strength during its exhumation. The slab studied here forms part of the high-P Samaná Terrane located on the north-eastern margin of the Hispaniola Island. Cold-cathodoluminescence images reveal relict cataclastic fabrics within the highest-pressure marbles of the Punta Balandra and Santa Bárbara Schists structural units, formed in the early stages of exhumation at P-T conditions ca. 2.0 GPa − 500 °C. Cataclastic flow was triggered after a moderate increase of water content (1.2% < w.t. H2O < 1.8%). Accordingly, grain sizes larger than equivalent radius ri = 40 μm preserve distribution of power law type with fractal dimensions D2 = 2.43 in Punta Balandra unit and D2 = 2.72 in Santa Bárbara unit. After cataclastic flow, the stress dropped and grain comminution conducted the marbles to the dissolution-precipitation domain. Then, as exhumation progressed, the effective stress increased and calcite intracrystalline plasticity process dominated. Calcite-twinning incidence and recrystallized grain-size indicate maximum paleostress ca. 350 MPa and mean flow paleostress ≈ 130 MPa. SEM-EBSD analyses show similar weak type-c calcite fabrics in all high-P carbonate units, even though they record different metamorphic P peak. Therefore, intracrystalline plasticity was probably dominant during the development of the final tectonic fabric. Finer grain-size distributions are out of fractal range, with D1 < 1, because of the further superposed deformation. Most of the data are consistent with an initial forced exhumation model of the carbonate slab in a brittle-ductile rheology of the confined plate interface. © 2016 Elsevier B.V. | es_ES |
dc.description.sponsorship | This contribution was funded by the research projects CGL2014-53388 and CGL2015-66997 of the SpanishMinistry of Science and Innovation. Funding by the CGL2009-08674/BTE and CGL2012-33669/BTE projects is also acknowledged | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | closedAccess | es_ES |
dc.subject | Caribbean tectonics | es_ES |
dc.subject | Cataclasis | es_ES |
dc.subject | High-P marbles | es_ES |
dc.subject | Paleostress | es_ES |
dc.subject | Subducted carbonate platform | es_ES |
dc.title | Exhumation of high-P marbles of the Samaná Terrane (Northern Hispaniola): Insights from paleostress and microstructural imprints | es_ES |
dc.type | artículo | es_ES |
dc.identifier.doi | 10.1016/j.tecto.2016.07.025 | - |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.tecto.2016.07.025 | es_ES |
dc.contributor.funder | Ministerio de Ciencia e Innovación (España) | es_ES |
dc.relation.csic | Sí | es_ES |
oprm.item.hasRevision | no ko 0 false | * |
dc.identifier.funder | http://dx.doi.org/10.13039/501100004837 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairetype | artículo | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | No Fulltext | - |
item.languageiso639-1 | en | - |
Aparece en las colecciones: | (Geo3Bcn) Artículos (IGME) Artículos |
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