| Discovery of Enclaves from Cenozoic Pulu Volcanic Rocks in West Kunlun Mountains and Its Geological Implications |
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| 作者姓名： | ZhangZhaochong XiaoXuchang |
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| 作者单位： | InstituteofGeology,ChineseAcademyofGeologicalSciences,Beijing100037 |
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| 基金项目： | This paper is funded by Ministry of Land and Mineral Resources (Nos. DKD2001001, 2001010204 and 20001010201). |
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| 摘 要： | In this paper,we present the occurrence and mineral components of the enclaves firstly dis-covered in the Cenozoic Pulu volcanic rocks in west Kunlun Mountains,and propose that the enclave is accumulated by fractional crystallization within high-level magma chamber.In addition,the chemical compostions of its primary magma are calculated.The calculated compositions are similar to those of the Kangxiwa volcanic rocks that belong to the same volcanic belt in the Pulu volcanic region,suggesting their origin from the same source region.However,the temperatures and oxygen fugacity of magmas at high-level magma chamber decreased along with fractional crystallization.
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| 关 键 词： | 地质构造 结构分异作用 火山岩 新生代 昆仑山 |
Discovery of Enclaves from Cenozoic Pulu Volcanic Rocks in West Kunlun Mountains and Its Geological Implications |
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| ZHANG Zhaochong,XIAO Xuchang,Wang Jun,Wang Yong.Discovery of Enclaves from Cenozoic Pulu Volcanic Rocks in West Kunlun Mountains and Its Geological Implications[J].Journal of China University of Geosciences,2002,13(1):30-34. |
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| Authors: | ZHANG Zhaochong XIAO Xuchang Wang Jun Wang Yong |
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| Abstract: | In this paper, we present the occurrence and mineral components of the enclaves firstly discovered in the Cenozoic Pulu volcanic rocks in west Kunlun Mountains, and propose that the enclave is accumulated by fractional crystallization within high-level magma chamber. In addition, the chemical compositions of its primary magma are calculated. The calculated compositions are similar to those of the Kangxiwa volcanic rocks that belong to the same volcanic belt in the Pulu volcanic region, suggesting their origin from the same source region. However, the temperatures and oxygen fugacity of magmas at high-level magma chamber decreased along with fractional crystallization. |
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| Keywords: | enclave fractional crystallization volcanic rocks West Kunlun Mountains |
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