| 红河断裂带中南段断层岩FT测年及其地质意义 |
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| 引用本文： | 张秉良,刘瑞珣,向宏发,万景林,黄雄南.红河断裂带中南段断层岩FT测年及其地质意义[J].地震地质,2009,31(1):44-56. |
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| 作者姓名： | 张秉良 刘瑞珣 向宏发 万景林 黄雄南 |
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| 作者单位： | 1. 中国地震局地质研究所,北京,100029
2. 北京大学,北京,1008711 |
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| 摘 要： | 通过对红河断裂带中南段18个糜棱岩、12个角砾岩、10个碎裂岩和8个砂砾岩的显微结构详细观察,部分典型样品的磷灰石裂变径迹测年(简称FT测年,以下同),获得了红河断裂带中南段断层活动转换过程中微观特征的变化:糜棱岩的微结构特征显示红河断裂带早期断层活动为左旋走滑,糜棱岩和未变形的砂砾岩FT年龄均>20Ma,表明这期间红河断裂带曾发生一次构造热事件;碎裂岩和角砾岩的微结构特征显示红河断裂带后期断层活动为右旋走滑,微结构特征不同的碎裂岩和角砾岩的FT年龄可分3个时段(9.9～12.7,6.8～8.4,2～4.6MaBP),表明红河断裂带中新世以来曾发生3次断层位错事件
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| 关 键 词： | 红河断裂带 断层岩 显微结构 FT测年 |
| 收稿时间： | 2009-01-22 |
FT DATING OF FAULT ROCKS IN THE CENTRAL-SOUTHERN SECTION OF THE RED RIVER FAULT ZONE AND ITS GEOLOGICAL IMPLICATIONS |
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| ZHANG Bing-liang,LIU Rui-xun,XIANG Hong-fa,WAN Jing-lin,HUANG Xiong-nan.FT DATING OF FAULT ROCKS IN THE CENTRAL-SOUTHERN SECTION OF THE RED RIVER FAULT ZONE AND ITS GEOLOGICAL IMPLICATIONS[J].Seismology and Geology,2009,31(1):44-56. |
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| Authors: | ZHANG Bing-liang LIU Rui-xun XIANG Hong-fa WAN Jing-lin HUANG Xiong-nan |
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| Abstract: | We have studied the variations of microstructures associated with the motion transformation in the central-southern section of the Red River Fault.Our work includes careful observation of microstructures of the 18 mylonite,12 breccia,10 cataclasite,and 8 sandy conglomerate samples from the fault,some of which are dated by the fission track in apatite(FT)method.Meanwhile,fault slip data are used to infer tectonic stress tensors.The results show that the microstructure of mylonite is indicative of left-slip d... |
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| Keywords: | Red River Fault fault rock microscopic structure FT dating |
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