| 藏北改则—色哇地区的蛇绿岩特征 |
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| 引用本文： | 林文第,陈德泉. 藏北改则—色哇地区的蛇绿岩特征[J]. 成都理工大学学报(自然科学版), 1990, 0(2) |
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| 作者姓名： | 林文第 陈德泉 |
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| 作者单位： | 成都地质学院地质矿产勘查系(林文第)，西藏地质矿产局区调队(陈德泉) |
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| 摘 要： | 藏北改则-色哇缝合带的蛇绿岩,与特罗多斯、岛湾的蛇绿岩剖面对比,区别是厚度小和缺乏席状岩墙。该区的变质超镁铁岩属阿尔卑斯橄榄岩-蛇纹岩组合,其化学成分与玄武岩互补,说明玄武岩浆系地幔岩分熔的产物。
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| 关 键 词： | 缝合带 蛇绿岩套 橄榄岩-蛇纹岩组合 侏罗纪 小洋盆 |
THE FEATURE OF THE OPHIOLITE IN GERZE-SEWA, NORTH XIZANG |
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| Lin Wendi,Chen Dequan. THE FEATURE OF THE OPHIOLITE IN GERZE-SEWA, NORTH XIZANG[J]. Journal of Chengdu University of Technology: Sci & Technol Ed, 1990, 0(2) |
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| Authors: | Lin Wendi Chen Dequan |
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| Affiliation: | Lin Wendi;Chen Dequan |
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| Abstract: | The complete sections of the ophiolitic suite aren't found yet in Gerze-Sewa Suture Zone,North Xizang, because the ophiolitic siute is dismembered by the structural dismemberment. However,all rock types have been found here, so the complete section of the ophiolitic suite may be set up. It canbe compared with the classical ocean curst ophiolite section at Troodos, Cyprus, Bay of Island, New-foundl and. But it is only less in thickness and lacks sheeted dike complex. The geological characteristics show that the metamorphic ultramafic rocks belong to alpine peri-dotite-serpentinite. The relation between the chemical composition of the ultramafic rocks and that ofthe basalts is mutually supplementary, so that the basaltic melt was derived from a partial melting prod-uct of the mantle rock. |
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| Keywords: | suture zone ophiolitic suite peridotite-serpentinite complex Jurassic small oceanic basin |
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