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

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    • 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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