Oligo-Miocene midcrustal subhorizontal shear zone in Indochina

被引：146

作者：

Jolivet, L

Beyssac, O

Goffé, B

Avigad, D

Lepvrier, C

Maluski, H

Thang, TT

机构：

[1] Univ Paris 06, Lab Tecton, ESA 7072, F-75252 Paris 05, France

[2] Ecole Normale Super, Geol Lab, UMR 8538, F-75231 Paris 05, France

[3] Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem, Israel

[4] Univ Montpellier 2, Lab Geochronol Geochim Petrol, UMR 5567, Montpellier, France

[5] Natl Univ Vietnam Hanoi, Geol Lab, Hanoi, Vietnam

来源：

TECTONICS | 2001年 / 20卷 / 01期

关键词：

D O I：

10.1029/2000TC900021

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 [地球物理学]; 070902 [地球化学];

摘要：

New structural observations of Oligo-Miocene deformation in north Vietnam along the Red River Shear Zone suggest that left-lateral strike-slip shear was restricted to the upper and middle crust above a horizontal shear zone. Left-lateral shear deformation is associated with low-pressure-low-temperature parageneses. High-temperature deformation is restricted to zones where the foliation has a low dip in the core of the Dai Nui Con Voi antiformal dome. These observations complete those made earlier in the Bu Khang extensional dome farther south. Above the horizontal shear zone left-lateral transpression was active during the first stage and changed to transtension some 33 Myr ago. Purely extensional metamorphic domes (Bu Khang) or transtensional domes (Dai Nui Con Voi) were exhumed during this younger stage. Our observations plead for caution when interpreting strike-slip structures at lithospheric scale.

引用

页码：46 / 57

页数：12

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