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    李莉, 白云山, 牛志军, 段其发, 卜建军. 青藏高原羌塘东部尕考查锐-西恰赛索闪长岩体特征及构造意义[J]. 地质与资源, 2009, 18(4): 250-255. DOI: 10.13686/j.cnki.dzyzy.2009.04.003
    引用本文: 李莉, 白云山, 牛志军, 段其发, 卜建军. 青藏高原羌塘东部尕考查锐-西恰赛索闪长岩体特征及构造意义[J]. 地质与资源, 2009, 18(4): 250-255. DOI: 10.13686/j.cnki.dzyzy.2009.04.003
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    LI Li, BAI Yun-shan, NIU Zhi-jun, DUAN Qi-fa, BU Jian-jun. GEOCHEMICAL CHARACTERISTICS AND TECTONIC SIGNIFICANCE OF THE GAKAOCHARUI-XIQIASAISUO DIORITE IN EASTERN QIANGTANG, QINGHAI-TIBET PLATEAU[J]. Geology and Resources, 2009, 18(4): 250-255. DOI: 10.13686/j.cnki.dzyzy.2009.04.003
    Citation: LI Li, BAI Yun-shan, NIU Zhi-jun, DUAN Qi-fa, BU Jian-jun. GEOCHEMICAL CHARACTERISTICS AND TECTONIC SIGNIFICANCE OF THE GAKAOCHARUI-XIQIASAISUO DIORITE IN EASTERN QIANGTANG, QINGHAI-TIBET PLATEAU[J]. Geology and Resources, 2009, 18(4): 250-255. DOI: 10.13686/j.cnki.dzyzy.2009.04.003
    shu

    青藏高原羌塘东部尕考查锐-西恰赛索闪长岩体特征及构造意义

    GEOCHEMICAL CHARACTERISTICS AND TECTONIC SIGNIFICANCE OF THE GAKAOCHARUI-XIQIASAISUO DIORITE IN EASTERN QIANGTANG, QINGHAI-TIBET PLATEAU

      摘要
    • 摘要: 尕考查锐-西恰赛索闪长岩体由黑云母石英闪长岩和不等粒辉长闪长岩组成，其单颗粒锆石U-Pb年龄为183 Ma，形成于早侏罗世.岩石富铝，属钙碱性系列.微量元素特征表现为：富集大离子亲石元素K、Rb、Ba及高场强元素Th，相对于其他相邻元素而言，Nb、Ta、P、Ti、Y略显亏损，（87Sr/86Sr）i值为0.70424~0.70581，而εNd（t）值为-0.6~+21.6，形成于岛弧环境.

       

      Abstract: The Gakaocharui-Xiqiasaisuo diorite rock body mainly consists of biotitic quartz diorite and gabrrodiorite. The pluton was formed in a volcanic arc environment in Early Jurassic defined by single zircon age of 183 Ma. The rocks are geochemically calc-alkaline and characterized by high Al, enriched K, Ba, Rb and Th, slight HFSE depletion such as Nb, Ta, P,Ti and Y. The initial Sr isotopes vary between 0.70424 and 0.70581, with high εNd(t) ranging from -0.6 to +21.6.

       

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