| 滇西洋拉矿区火山岩构造—岩浆类型 |
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| 引用本文： | 魏君奇,陈开旭,何龙清.滇西洋拉矿区火山岩构造—岩浆类型[J].地球学报,1999,20(3):246-252. |
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| 作者姓名： | 魏君奇 陈开旭 何龙清 |
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| 作者单位： | 中国地质科学院宜昌地质矿产研究所;中国地质科学院宜昌地质矿产研究所;中国地质科学院宜昌地质矿产研究所 |
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| 基金项目： | 国土资源部资源与环境攻关项目,定向基金项目“滇西德钦羊拉地区铜矿成矿条件及远景预测（95－12）”课题 |
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| 摘 要： | 羊拉矿区的火山岩形成于石炭纪金沙江裂谷洋盆中段，其构造－岩浆类型有３：早石炭世羊拉岩组的富集型洋中脊拉斑玄武岩；晚石炭世里农岩组的洋岛钙碱性安山岩和洋岛碱性率武岩。各种构造－岩浆类型的形成均与地幔热性相关。
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| 关 键 词： | 洋中脊玄武岩 洋岛玄武岩 洋岛安山岩 |
Tectono-Magmatic Types of Volcanic Rocks in the Yangla Ore District,Western Yunnan |
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| WEI Jun-qi,CHEN Kai-xu and HE Long-qing.Tectono-Magmatic Types of Volcanic Rocks in the Yangla Ore District,Western Yunnan[J].Acta Geoscientia Sinica,1999,20(3):246-252. |
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| Authors: | WEI Jun-qi CHEN Kai-xu and HE Long-qing |
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| Institution: | Yichang Institute of Geology and Mineral Resources, CAGS;Yichang Institute of Geology and Mineral Resources, CAGS;Yichang Institute of Geology and Mineral Resources, CAGS |
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| Abstract: | In the Yangla ore district, the volcanic rocks were formed in the central part of Jinshajiang rift-oceanic basin.There are three kinds of tectono-magmatic types:Early Carboniferous enrichment mid-ocean ridge tholeiitic basalts (E-MORB) of Yangla Formation Complex,Late Carboniferous ocean-island calc-alkalic andesite(OIA )and ocean_island alkalic basalts(OIB) of Linong Formation Complex. OIA was produced by crystallization differtiation of OIB and E-MORB mixed magma,and part of E-MORB was formed by mass and energy exchange of OIB and N-MORB.The formation of tectono-magmatic types was related to the mantle plume. |
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| Keywords: | mid-ocean ridge basalts ocean-island basalts ocean-island andesite |
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