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首页> 外文期刊>Journal of Asian earth sciences >Structural geometry, microstructural and strain analyses of L-tectonites from Paleoproterozoic orthogneiss: Insights into local transport-parallel constrictional strain in the Sikkim Himalayan fold thrust belt
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Structural geometry, microstructural and strain analyses of L-tectonites from Paleoproterozoic orthogneiss: Insights into local transport-parallel constrictional strain in the Sikkim Himalayan fold thrust belt

机译：古元古代正生L-构造体的结构几何，微观结构和应变分析：对锡金喜马拉雅褶皱逆冲带中局部运移平行压缩应变的认识

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摘要

Paleoproterozoic Lingtse orthogneiss shows three dominant structural associations in the Sikkim Himalayan fold thrust belt (FTB): (a) these rocks locally define the Pelling thrust (PT) zone that lies in the footwall of the Main Central thrust (MCT), (b) they occur as linear, almost N-S trending imbricates within the PT sheet, and (c) they form a N-S trending similar to 13.5 km long, similar to 2 km wide discontinuous linear mylonitic klippen within the Daling Formation of the lower Lesser Himalayan Sequence (LHS) that lie east of the N-S trending Teesta valley. The klippe records N-S trending, strong L-tectonites that are spatially associated with LS and SL tectonites; the stretching lineations are oriented along the transport direction. These rocks are exposed along three mylonite zones. From north to south these are the Phodong mylonite zone, the Tumin Eingee mylonite zone and the Rumtek mylonite zone.
机译：古元古代的Lingtse斜生岩在锡金喜马拉雅褶皱逆冲带（FTB）中显示出三个主要的结构联系：（a）这些岩石局部地定义了位于主中央逆冲（MCT）底盘中的Pelling逆冲（PT）带，（b）它们在PT片内以线性，几乎为NS趋势的成岩状出现，并且（c）在较低的小喜马拉雅层序（LHS）的大凌组内，形成了一个NS趋势，其趋势类似于13.5 km长，类似于2 km宽的不连续线性mylonitic klippen ）位于北领地的Teesta山谷以东。 Klippe记录了N-S趋势的强L-构造体，它们在空间上与LS和SL构造体相关；拉伸线沿运输方向取向。这些岩石沿三个镍铁矿带暴露。从北到南分别是Phodong的mylonite区，Tumin Eingee的mylonite区和Rumtek的mylonite区。

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