| 中祁连东段东缘韧性剪切带特征 |
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| 引用本文： | 董瀚, 李鸿睿, 石文礼. 中祁连东段东缘韧性剪切带特征[J]. 西北地质, 2002, 35(3): 53-58. |
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| 作者姓名： | 董瀚 李鸿睿 石文礼 |
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| 作者单位： | 甘肃省地勘局第三地质矿产勘查院, 甘肃 兰州 730050 |
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| 基金项目： | 1∶ 5万青城乡幅、金崖乡幅区调成果 |
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| 摘 要： | 位于祁连造山带东段的白银地区,在1:5万区域地质调查中发现了两条近乎平行排列的北北东向韧性剪切带,据几何形态和显微组构特征,该剪切带均属于右行走滑韧性剪切带,是加里东末期祁连造山带与秦岭造山带呈反“S”型拼接的产物,区内在构造-岩浆作用下,造成陆块间的走滑或旋转定位。
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| 关 键 词： | 中祁连东段 韧性剪切带 甘肃白银地区 |
| 文章编号： | 1009-6248(2002)03-0053-06 |
| 收稿时间： | 2001-12-31 |
| 修稿时间： | 2001-12-31 |
Characteristics of the ductile shear zone of the eastern margin in the east section of the Mid-Qilian massif,Gansu |
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| DONG Han, LI Hong-rui, SHI Wen-li. Characteristics of the ductile shear zone of the eastern margin in the east section of the Mid-Qilian massif, Gansu[J]. Northwestern Geology, 2002, 35(3): 53-58. |
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| Authors: | DONG Han LI Hong rui SHI Wen li |
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| Affiliation: | Third of Gansu Institute of Geology and Mineral Exploration, Lanzhou 730050, China |
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| Abstract: | In the eastern Oilian orogenic belt of Baiyin area,Gansu,we discovered two NNE directive ductile shear zones that ranges parallelly through 1:50000 geological mapping. According to the characteristic of geometric conformation and microscopic fabric,it is suggested that zones are right-lateral strike-slip shear and opposite "S" suture progeny formed by oblique collisions of Qilian and Qinling orogenic belt at terminal Caledonian. At the effect of structure and magmatite in this district,it finally formed by st rike-slip of different continental blocks. |
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| Keywords: | east section of mid Qilian massif ductile shear zones Baiyin area Gansu |
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