globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00531-013-0983-4
Scopus记录号: 2-s2.0-84896542585
论文题名:
Plio-Quaternary thin-skinned tectonics along the crustal front flexure of the southern Central Andes: A record of the regional stress regime or of local tectonic-driven gravitational processes?
作者: Messager G.; Nivière B.; Lacan P.; Hervouët Y.; Xavier J.-P.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期:3
起始页码: 929
结束页码: 951
语种: 英语
英文关键词: Argentina ; Gravity gliding ; Quaternary ; Roll-over ; Southern Central Andes ; Thick- and thin-skinned tectonics
Scopus关键词: crustal movement ; deformation ; geomorphological response ; gravity anomaly ; Pliocene ; Quaternary ; stress ; tectonic structure ; Andes ; Argentina
英文摘要: We present here a record of Plio-Pleistocene deformations above the flexural front of the southern Central Andes of Argentina. We combine a seismic profile with structural and geomorphological observations to show that thin-skinned extension located on top of the crustal front flexure is coeval with thin-skinned shortening at the toe of the topographic bulge. The seismic line shows that a flat zone with no internal deformation separates the stretched and shortened domains. Such features are usually interpreted as the result of strike-slip faulting along basement faults, or tangential longitudinal strain folding in the soft sedimentary cover above crustal bending. We propose an alternative linking extension at the apex of the crustal anticline, to basal contraction by the downslope translation of a rigid thin nappe of sediments (30 × 30 km2 in area) above evaporites at a depth of 700-900 m. The size of such a process is unusually large onshore (630-810 km3) but mimics the gravity gliding observed in deltas and passive margins. Since this process disconnects zones with a shallow stress field from deeper crustal levels, it could allow extension above a compressive deformation front and should not be interpreted merely as a record of the crustal stress regime. Large-scale gravity gliding of the cover down the slope of a structural high could also explain some of the extension observed in mountain hinterlands. © 2013 Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896542585&doi=10.1007%2fs00531-013-0983-4&partnerID=40&md5=855ad566cd837ba0c181a1aff8fbb405
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70342
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Laboratoire des Fluides Complexes et de leurs Réservoirs, UMR5150-CNRS-TOTAL, Université de Pau et des pays de l'Adour, IPRA, BP 1155, 64013 Pau Cedex, France; Group of Dynamic of the Lithosphere, Institute of Earth Sciences Jaume Almera, CSIC, Lluís Solé i Sabarís s/n, 08028 Barcelona, Spain; Statoil ASA, Sandsliveien 90, 5254 Bergen, Norway; Centro de Geociencias, Universidad Nacional Autónoma de México, Blvd. Juriquilla, 3001, 76230 Juriquilla, QRO, Mexico; TOTAL EandP, CSTJF-Géomatique, Avenue Larribau, 64000 Pau, France

Recommended Citation:
Messager G.,Nivière B.,Lacan P.,et al. Plio-Quaternary thin-skinned tectonics along the crustal front flexure of the southern Central Andes: A record of the regional stress regime or of local tectonic-driven gravitational processes?[J]. International Journal of Earth Sciences,2014-01-01,103(3)
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