| 东秦岭松树沟蛇绿岩构造变形及其演化 |
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| 引用本文： | 董云鹏,周鼎武.东秦岭松树沟蛇绿岩构造变形及其演化[J].西北地质科学,1995,16(2):37-47. |
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| 作者姓名： | 董云鹏 周鼎武 |
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| 作者单位： | 西北大学地质系 |
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| 摘 要： | 东秦岭松树沟蛇绿岩是沿西沟早期韧性剪切带和界岭韧性剪切带构造侵位于早元古代秦岭群变质杂岩南缘之上的蛇绿岩推覆体，主要遭受了４期构造变形，反映蛇绿岩演化过程中四期主要的构造运动，分别为：１０亿年左右上地幔部分熔融残余体──蛇绿橄榄岩块底辟侵位于上覆玄武岩、晋宁期蛇绿岩构造侵位、加里东─早华力西期由南向北的过冲及晚华力西─印支期的左行走滑运动。
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| 关 键 词： | 东秦岭 蛇绿岩 剪切带 构造变形 |
DEFORMATION AND EVOLUTION OF SONGSHUGOU OPHIOLITE IN EASTERN QINLING |
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| Dong Yunpeng, Zhou Dingwu and Liu Liang.DEFORMATION AND EVOLUTION OF SONGSHUGOU OPHIOLITE IN EASTERN QINLING[J].Northwest Geoscience,1995,16(2):37-47. |
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| Authors: | Dong Yunpeng Zhou Dingwu and Liu Liang |
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| Abstract: | he ophiolite of Songshugou in the east Qinling occurred as a nappe sheet, which overthrusted from south to north and tectonicly emplaced on the south of Qinling group along Xigou ductile shear zone and Jieling ductile shear zone. The studies of deformation suggest that the evolution of the Songshugou ophiolite has undergone four phases of deformation:D1, the ultramafic rocks deformed when they diapric emplaced into the overlying basalts,and characterized by the ductile shear zone in the peridotites. D2, about 900 Ma, the tectonic emplacment of Songshugou ophiolite resulted in the formation of the penetrating planer in the peridotites and basalts. D3, the ophiolite nappe rethrusted from south to north during Palaeozoic. D4, there were superimposed deformations on the earlier three phases of deformation, which were caused by strike-slip shearing from later stage of the Variscan epoch to the Indosinia epoch. |
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| Keywords: | astern Qinling ophiolite ductile shear zone tectonic emplacement |
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