| 吉林夹皮沟地区变质作用与地壳演化 |
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| 引用本文： | 葛文春,吴福元,孙德有.吉林夹皮沟地区变质作用与地壳演化[J].吉林大学学报(地球科学版),1993(3). |
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| 作者姓名： | 葛文春 吴福元 孙德有 |
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| 作者单位： | 长春地质学院地质系
(葛文春，吴福元)，长春地质学院地质系(孙德有) |
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| 摘 要： | 本区经历四期变质作用,太古宙上壳岩系麻粒岩相变质、晚太古宙英云闪长岩高角闪岩相变质、早元古宙紫苏花岗岩类低角闪岩相变质和元古宙绿片岩相变质。麻粒岩相变质期可分三个阶段,早期角闪岩相、峰期麻粒岩相和晚期角闪岩相,其P-T-t轨迹为逆时针,与IBC型轨迹相似。导致麻粒岩相变质作用的热源为英云闪长质岩浆的垫托作用,形成于岛弧或活动大陆边缘。区内广泛发育的钾长花岗岩与晚太古宙高角闪岩相变质作用晚期的深熔作用有关。
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| 关 键 词： | 变质作用 地壳演化 矿物转化 夹皮沟 |
THE METAMORPHISM AND THE CRUSTAL EVOLUTION OF JIAPIGOU AREA JILIN PROVINCE |
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| Ge Wenchun Wu Fuyuan Sun Deyou.THE METAMORPHISM AND THE CRUSTAL EVOLUTION OF JIAPIGOU AREA JILIN PROVINCE[J].Journal of Jilin Unviersity:Earth Science Edition,1993(3). |
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| Authors: | Ge Wenchun Wu Fuyuan Sun Deyou |
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| Institution: | Department of Geology |
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| Abstract: | Four periods of metamorphism took place in Jiapigou area, Jilin Province. The granulite facies metamorphism can be recognized in the Archean supercrust rocks, the high amphibolite facies metamorphism appears in the late Archean tonalites, the low amphibolite facies metamorphism and the green schist facies metamorphism are found in the early proterozoic charnockites. The granulite facies metamorphism can be further classified into three stages: the early stage of amphibolite facies, the peak stage of grannulite facies and the late stage of amphibolite facies. The PTt path of the granulite facies metamorphism is clockwise and similar to IBC type. The heat source resulting in the granulite facies metamorphism is derived from the underplating process of tonalitic magma, which was formed in the active continental margin. The Origin of the Kaligranites cropped widely in this area is related with the anatexism occuring in the later period of the late Archean amphibolite facies metamorphism. |
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| Keywords: | Metamorphism Crustal evolution Mineral transformation Jiapigou area |
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