| 西藏罗布莎豆荚状铬铁矿成矿演化的构造过程 |
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| 引用本文： | 李德威.西藏罗布莎豆荚状铬铁矿成矿演化的构造过程[J].现代地质,1995,9(4):450-458,T001. |
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| 作者姓名： | 李德威 |
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| 作者单位： | 武汉地球科学院 |
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| 摘 要： | 通过对罗布莎铬铁矿区的构造解析，揭示出了豆荚状铬铁矿的成矿演化规律。由地幔韧性剪切带和脆－韧性剪切带组成的含铬剪切带是成矿期构造，被造山期发生的变形分解作用和脆性断裂作用改造，成矿演化经历了从上地幔到上地壳所发生的５个构造变形相的转换，即熔融流变变形相→地幔韧性剪切变形相→壳幔脆→韧性剪切变形相→塑性挤压变形相→脆性断裂变形相，可划分为中生代改造成矿和新生代矿床改造两个阶段，并概括为包含６个变形世代的构造成矿序列。
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| 关 键 词： | 成矿演化，构造过程，构造成矿序列，罗布莎铬铁矿 |
STRUCTURAL PROCESSES OF METALLOGENIC EVOLUTION OF LUOBUSHA CHROMITE DEPOSITS |
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| Li Dewei.STRUCTURAL PROCESSES OF METALLOGENIC EVOLUTION OF LUOBUSHA CHROMITE DEPOSITS[J].Geoscience——Journal of Graduate School,China University of Geosciences,1995,9(4):450-458,T001. |
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| Authors: | Li Dewei |
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| Abstract: | he structural analyses of the Luobusha chromite deposits show the metallogenic evolution regularities of podiform chromites. The Cr-bearing shear zones including mantle ductile shear zones and brittle -ductile shear zones are. metallogenic structures damaged by deformation partitioning and brittle faulting in orogenic phase. Metallogenic evolution has experienced transforming of five structural deformation facieses from upper mantle to upper crust, i. e.,melt flow deformation factes, mantle ductile shear deformation factes,brittle -ductile shear deformation factes, plastic compression deformation factes and brittle fault deformation factes,can be divided into two stages of reworking metallization and reworking of deposits, and can be summarized as tectono-metallogenic sequence with six deformation generations. |
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| Keywords: | metallogenic evolution structural process tectono-metallogenic sequence Luobusha chromite |
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