| 西天山海西中期花岗岩的地质特征及其构造环境 |
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| 引用本文： | 李伍平,姜常义,吴文奎,谢广成.西天山海西中期花岗岩的地质特征及其构造环境[J].地球科学与环境学报,1995(4). |
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| 作者姓名： | 李伍平 姜常义 吴文奎 谢广成 |
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| 作者单位： | 西安地质学院资源系，西安地质学院科研处，西安地质学院地质构造所，西安地质学院节能所 |
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| 摘 要： | 海西中期花岗岩是西天山加里东褶皱带内规模最大的一次岩浆活动。本文从岩石学、矿物学、岩石化学和地球化学等方面对该期花岗岩的成因类型、岩浆起源和形成的构造环境进行了探讨，认为海西中期花岗岩以Ｉ型为主，Ｓ型次之，在空间上成对分布，花岗岩浆起源于地壳；海西中期花岗岩形成于活动大陆边缘岛孤环境．
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| 关 键 词： | 西天山 海西中期，I型花岗岩，活动大陆边缘 地壳 |
GEOLOGIC FEATURES AND TECTONIC ENVIRONMENTS OF GRANITES AT THE VARISCIAN MIDDLE PERIOD IN THE WEST TIANSHAN MOUNTAIN |
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| Li Wuping, Jiang Changyi, Wu Wenkui, Xie Guangcheng.GEOLOGIC FEATURES AND TECTONIC ENVIRONMENTS OF GRANITES AT THE VARISCIAN MIDDLE PERIOD IN THE WEST TIANSHAN MOUNTAIN[J].Journal of Earth Sciences and Environment,1995(4). |
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| Authors: | Li Wuping Jiang Changyi Wu Wenkui Xie Guangcheng |
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| Abstract: | Granites at the middle Variscian period are the largest scale magma activities on the Caledonia foldbelt inthe west Tianshan mountain. In this paper, the authors discuss the petrogenic types, magma origin and formation, and tectonic environments in the petrology, mineralogy, petrochemistry and geochemistry aspectsand get the conclusions that the main petrogenic type was I-type, granitic magma was originated from thecrust, and granites at the middle Variscian period were formed in the environments of the active continentalmargin. |
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| Keywords: | The west Tianshan mountain middle Variscian period I-type granite Active continental margin The crust |
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