| 藏南羊卓雍错南部桑秀组火山岩的特征及构造环境 |
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| 引用本文： | 钟华明,童劲松,夏军,鲁如魁,邱军强.藏南羊卓雍错南部桑秀组火山岩的特征及构造环境[J].地质通报,2005,24(1):72-79. |
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| 作者姓名： | 钟华明 童劲松 夏军 鲁如魁 邱军强 |
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| 作者单位： | 1. 安徽省地质调查院,安徽,合肥,230001
2. 安徽省地质调查院,安徽,合肥,230001;中国地质大学地球科学与资源学院,北京,100083 |
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| 基金项目： | 中国地质调查局《1∶25万洛扎幅区域地质调查》项目部分成果。 |
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| 摘 要： | 羊卓雍错南部桑秀组中分布有由玄武岩-安山岩-英安岩构成的海相火山岩组合，区域露头上玄武岩占绝对优势，喷发时代为晚侏罗世晚期-早白垩世早期。区域资料显示，这一时期该地区处于冈瓦纳大陆的被动陆缘。地球化学特征表明，本区火山岩与洋脊玄武岩和洋岛型玄武岩有明显区别，显示大陆拉张带或大陆裂谷亚碱性拉斑玄武岩的特征。
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| 关 键 词： | 晚侏罗世-早白垩世 火山岩 拉斑玄武岩系列 藏南羊卓雍错 |
| 文章编号： | 1671-2552(2005)01-0072-08 |
| 修稿时间： | 4/1/2004 12:00:00 AM |
Characteristics and tectonic setting of volcanic rocks of the Sangxiu Formation in the southern part of Yamzho Yumco, southern Tibet. |
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| Abstract: | A marine volcanic rock association composed of basalt, andesite and dacite is distributed in the Sangxiu Formation in the southern part of Yamzho Yumco. It was erupted in the late Late Jurassic to early Early Cretaceous. Regional data indicate that this area was located on the passive continental margin of the supercontinent Gandwana during this period. Geochemical analysis indicates that the volcanic rocks formed in a continental-margin rift environment. |
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| Keywords: | Late Jurassic-Early Cretaceous volcanic rocks tholeiite series Yamzho Yumco southern Tibet |
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