| 新疆东昆仑祁漫塔格地区上三叠统火山岩岩石成因初探 |
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| 引用本文： | 沈远超,杨金中,王岳军,刘铁兵.新疆东昆仑祁漫塔格地区上三叠统火山岩岩石成因初探[J].大地构造与成矿学,1999,23(1):50-58. |
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| 作者姓名： | 沈远超 杨金中 王岳军 刘铁兵 |
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| 作者单位： | 1. 中国科学院地质研究所,北京,100029
2. 中国科学院长沙大地构造研究所,长沙,410013 |
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| 摘 要： | 新疆东昆仑祁漫塔格地区分布着一套上三叠统、喷发韵律明显的陆相火山岩和火山碎屑岩，它们起源于地下深部富集稀土元素的异常地幔，经历了一次从基性－中性－酸性的岩浆连续演化过程，是东昆仑构造演化转折期的产物。
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| 关 键 词： | 火山岩系列 异常地幔 祁漫塔格 |
PETROLOGIC CHARACTERISTICS AND TECTONIC SETTING OF VOLCANIC ROCKS FROM UPPER TRIASSIC SYSTEM IN THE QIMANTAGE REGION IN EAST KUNLUN OROGENIC BELT,XINJIANG |
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| SHEN Yuanchao,YANG Jinzhong,WANG Yuejun,LIU Tiebing.PETROLOGIC CHARACTERISTICS AND TECTONIC SETTING OF VOLCANIC ROCKS FROM UPPER TRIASSIC SYSTEM IN THE QIMANTAGE REGION IN EAST KUNLUN OROGENIC BELT,XINJIANG[J].Geotectonica et Metallogenia,1999,23(1):50-58. |
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| Authors: | SHEN Yuanchao YANG Jinzhong WANG Yuejun LIU Tiebing |
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| Abstract: | In the southeast of the Qimantage region in east Kunlun orogenic belt, there are a series ofvolcanic rocks which have the obviously eruptive rhythmicity. In rare earth element geochemistry,all the rocks are characterized by the light-REE-enriched pattern, and with the increasing of thecontent of SiO2, the negative Eu anomaly has become obvious. Based on the petrological and geo-chemical results, we proposed that the volcanic series had been derived from the anomalous mantlewhich had been enriched by rare earth element, and had experienced the evolution from the basic,the neutral to the acidic magma. |
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| Keywords: | volcanic series anomalous mantle Qimantage |
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