The structural architecture of the footwall to the main Uralian fault, southern Urals

被引:49
作者
Brown, D [1 ]
Puchkov, V [1 ]
AlvarezMarron, J [1 ]
PerezEstaun, A [1 ]
机构
[1] RUSSIAN ACAD SCI,UFIMIAN GEOSCI CTR,UFA 450001,RUSSIA
关键词
D O I
10.1016/0012-8252(95)00051-8
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The Uralide orogen is a linear collisional belt formed during the Upper Paleozoic as a result of convergence between the East European Craton and outboard terranes, and accretion of intervening island arcs and obduction of oceanic crust onto the East European Craton. This paper presents a new structural subdivision of the southern Urals, to the west of the main suture zone, that puts this part of the mountain belt in a context similiar to that of other collisional orogenic belts. This subdivision consists of a west-vergent thrust stack that is made up of an autochthonous to parautochthonous foreland basin, and a parautochthonous foreland thrust and fold belt, flanked to the east by a metamorphic thrust stack. The latter units are structurally overlain by allochthonous rocks of an accretionary complex, slope sediments, oceanic crust and high grade, eclogite-blueschist-bearing, gneiss. Where possible these units are defined on the basis of their internal stratigraphy and structure and on the nature of their bounding faults.
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页码:125 / 147
页数:23
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