| 青藏高原比如地体与措勤地体相对古构造位置判别 |
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| 引用本文： | 李本亮,张永军,夏邦栋,孙岩.青藏高原比如地体与措勤地体相对古构造位置判别[J].大地构造与成矿学,2000,24(1):38-43. |
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| 作者姓名： | 李本亮 张永军 夏邦栋 孙岩 |
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| 作者单位： | 1. 南京大学地球科学系,江苏,南京,210093
2. 地矿部航遥中心,北京,100083 |
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| 基金项目： | 西南石油学院校科研和教改项目;; |
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| 摘 要： | 本文采用蚀源区判别图解QFL和QpLsLv、微量元素图解Th -Co -Zr/10、常量元素图解K2O/Na2O -SiO2 和野外地质实测剖面等方法 ,对比如、措勤地体的构造演化进行了分析。发现并证实了在T3-J1 以前比如地体位于措勤地体的北部 :J2 -3 时随着班—恕缝合带的拉张 ,比如地体开始右旋向东滑动 :一直延续到J3-K1 时 ,班—怒缝合带闭合 ,比如地体才就位于目前位置。最后应用1/ZTR指数推测了比如地体在J2 -3 时滑移点的大致位置 (E90°49,N31°34)。
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| 关 键 词： | 比如地体 措勤地体 班—怒(缝合)带 1/ZTR指数 |
RECOGNITION OF ANCIENT TECTONIC RELATIVE LOCATION OF THE BIRU TERRAIN AND CUOQIN TERRAIN |
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| Abstract: | Using the sandstone samples of C K formations in the Biru Terrain,Cuoqin Terrain and their peripheral areas,the authors make the tectonics property maps,QFL and QPLsLv of erosion areas,trace elements relationship map,Th Co Zr/10,common elements relationship map and K2O/Na2O SiO2 and by combination of field testing stone cross profile,analyze tectonic evolution.It indicates that before T3-J1 the Biru Terrain was located north of the Cuoqin Terrain.Then with the Bangonghu Nujiang suture(BNS)extending in J2 3,the Biru Terrain started to strike slip toward east.Up to J2 3 the Bangonghu Nujiang suture(BNS)had nearly closed,and the Biru Terrain fixed to its present location.According to the 1/ZTR factor the authors also deduced the approximate strike slip location,present E90°49′N31°34′,in J2 3. |
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| Keywords: | Biru Terrainl Cuoqin Terrain B-N suture zone 1/ZTR factor |
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