| 滇西洋拉矿区火山岩构造—岩浆类型 |
| 点此下载全文 |
| 引用本文：魏君奇,陈开旭,何龙清.1999.滇西洋拉矿区火山岩构造—岩浆类型[J].地球学报,20(3):246-252. |
| DOI： |
| 摘要点击次数: 2359 |
| 全文下载次数: 2202 |
|
| 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 |
|
| 中文摘要: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。 |
| 中文关键词: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 |
|
|
| 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. |
| keywords:mid-ocean ridge basalts ocean-island basalts ocean-island andesite |
| 查看全文 查看/发表评论 下载PDF阅读器 |
