DOI: 10.1007/s00531-013-0940-2
Scopus记录号: 2-s2.0-84902531087
论文题名: The Ufa indenter: Stratigraphic and geophysic evidences for an actual indentation of the Southern Urals by the East European craton
作者: Lefort J.-P. ; Danukalova G.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 5 起始页码: 1513
结束页码: 1525
语种: 英语
英文关键词: Plio-Quaternary neotectonics
; Southern Urals indentation
; Stratigraphy tectonics
Scopus关键词: Cretaceous
; crustal thickening
; Eocene
; indentation
; magnetic anomaly
; neotectonics
; Pliocene
; Quaternary
; shear zone
; tectonostratigraphy
; uplift
; East European Craton
; Urals
英文摘要: Study of the altitudes of the lowest part of the Upper Cretaceous-Eocene and Aktschagylian-Quaternary stratigraphic ensembles known on the western slope of the Southern Urals evidences the existence of an East-West elongated dome which follows the N53° latitude. This ridge is superimposed at depth with the remnants of the Sernovodsk-Abdulino Aulacogen and with the Belaya tear fault, which support the existence of a recent rejuvenation of these old structures. North of these disruptions the Southern Urals display a clear bent towards the East. Detailed microstructural studies show that this curvature is associated with a typical stress pattern which suggests the existence of an indentation of the fold belt by the East European craton. The hypothesis of an Ufa indenter is not supported by an equivalent East-West deep fault north of the bend. However, a long N100° magnetic anomaly, interpreted as a shear zone, suggests that the indenter is a reality. Quaternary uplift and crustal thickening at its front as well as seismological data support our interpretation. It is not stressed that the curvature of the Urals observed at 56° latitude results solely from this recent indentation. It is only assumed that the actual indentation is rejuvenating a former unevenness which existed before in the East European craton. Study of the inner part of the indenter shows that this type of structure is not necessarily rigid and undeformed. Some of the structures described on the URSEIS deep seismic line could be much younger than previously expected. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902531087&doi=10.1007%2fs00531-013-0940-2&partnerID=40&md5=6d3aea094a90c6b41658161e1ac7ef30
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70375
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 d'Archéosciences (bat. 24-25), 74205 CS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France; Institute of Geology of the Ufimian Scientific Centre, Russian Academy of Sciences, Ufa, K. Marx St., 16/2, 450077 Bashkortostan, Russian Federation
Recommended Citation:
Lefort J.-P.,Danukalova G.. The Ufa indenter: Stratigraphic and geophysic evidences for an actual indentation of the Southern Urals by the East European craton[J]. International Journal of Earth Sciences,2014-01-01,103(5)