| 一种走滑剪切-逆冲推覆相互转换的变形体系——以桂东南那卜地区NE向和NW向两组韧性剪切带为例 |
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| 引用本文： | 覃小锋.一种走滑剪切-逆冲推覆相互转换的变形体系——以桂东南那卜地区NE向和NW向两组韧性剪切带为例[J].南方国土资源,2002,15(2):7-11. |
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| 作者姓名： | 覃小锋 |
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| 作者单位： | 中国地质大学地球科学学院,湖北,武汉,430074 |
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| 摘 要： | 桂东南那卜地区宁潭超单元及其围岩中,主期变形变质作用形成的韧性剪切带可分为2类NE向右行走滑性质的韧性剪切带;NW向逆冲推覆性质的韧性剪切带.通过对以上2类韧性剪切带的构造样式、显微组构以及运动学特征等的综合分析表明,它们形成的构造应力是NE-SW向的,在这一应力的作用下,使早期NE向和NW向构造重新活动,从而构成了一种NE向走滑-NW向逆冲的相互转换程式,即NE向右行走滑性质韧性剪切带和NW向逆冲推覆性质韧性剪切带相互转换的韧性变形体系.
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| 关 键 词： | 韧性剪切带 右行走滑 逆冲推覆 相互转换 桂东南 |
| 文章编号： | 1003-7861(2002)02-0007-05 |
| 修稿时间： | 2002年1月4日 |
ONE OF THE DUCTILE DEFORMATION SYSTEM THAT TRANSFORM EACH OTHER FROM NE-TRENDING DEXTRAL STRIKE-SLIP TO NW-TRENDING THRUST-NAPPE——Illustrated with an example from NE-trending ductile shear zones and NW-trending ductile shear zones in Nabu area |
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| Authors: | QIN Xiao-feng |
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| Abstract: | The ductile shear zones formed by principal deformation and metamorphism in Ningtan granite supper-units and its circumambient rocks in Nabu area of Southeastern Guangxi may be divided into two types: NE-trending dextral strike-slip ductile shear zones; NW-trending thrust-nappe ductile shear zones. On the basis of an integrated analysis of the characteristics of tectonic style, microscopic fabric and kinematics of these ductile shear zones, show that they are formed by the NE-SW compression. Structure formed by deformation and metamorphism at the early stage that have begun activity again under this compression, which made one of the ductile deformation system that transform each other from NE-trending dextral strike-slip ductile shear zones to NW-trending thrust-nappe ductile shear zones. |
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| Keywords: | the ductile shear zones dextral strike-slip thrust-nappe transform each other Southeastern Guangxi |
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