吉尔吉斯天山晚古生代岩浆活动及相关成矿作用

发布时间：2018-02-03 22:47

本文关键词： 天山吉尔吉斯斯坦古生代岩浆作用成矿作用　出处：《地质学报》2017年04期 　论文类型：期刊论文

【摘要】：本文通过对近年来有关吉尔吉斯天山研究进展的梳理,结合在吉尔吉斯斯坦的实地考察,系统论述了吉尔吉斯天山古生代基础地质情况,着重讨论了与岩浆作用相关的成矿过程。吉尔吉斯斯坦境内的天山由"尼古拉耶夫线"和阿特巴什-伊内尔切克断裂划分为北、中、南三部分。两条缝合带限定了早古生代捷尔斯凯伊洋和晚古生代南天山洋的发展和消亡过程。吉尔吉斯天山古生代岩浆作用大致分为两个阶段:早古生代捷尔斯凯伊洋演化过程中,与弧-陆碰撞、弧-弧碰撞相关的岩浆作用和晚古生代与南天山洋闭合相关的岩浆作用。晚古生代存在两个重要的成矿阶段:晚石炭世与南天山洋向北俯冲形成的弧岩浆作用相关的斑岩型、矽卡岩型铜-金矿床;早二叠世与后碰撞花岗岩侵入作用相关,并受剪切带控制的金-多金属矿床。南天山缝合带附近出露的不同岩体在岩石地球化学及矿化特征的差异,反映了位于阿特巴什-伊内尔切克断裂以北的岩浆源区为成矿物质贫瘠的中天山前寒武纪基底,而断裂以南的岩浆作用源区为富集流体及成矿元素的增生杂岩和塔里木被动陆缘沉积物。
[Abstract]:Based on the review on progress of the Kyrgyz Tianshan research in recent years, based on fieldwork in Kyrgyzstan, discusses the Kyrgyz Tianshan Paleozoic basic geological situation, emphatically discussed the metallogenic processes associated with magmatism. The Tianshan Mountains of Kyrgyzstan within the territory by "Nikolaev line" and the bash - ginell Cech fracture, divided into the North. The three part of the south. Two suture zone defines the early Paleozoic and late Paleozoic ocean Jieersi, South Tianshan ocean development and disappearance process. The Kyrgyz Tianshan Paleozoic magmatism can be divided into two stages: the early Paleozoic Jieersi Kay ocean evolution process, arc continent collision and collision, arc arc related magmatism and late Paleozoic South Tianshan ocean closed magma. There are two important metallogenic stages: Late Carboniferous and late Paleozoic South Tianshan ocean The formation of northward subduction of arc magmatism related to the porphyry type, skarn type copper gold deposit; Early Permian post collisional granite intrusion, and controlled by shear zone gold polymetallic deposit. The South Tianshan suture zone near the differences in the rock geochemistry and mineralization characteristics of different rock mass exposed. Located at bash - ginell reflects the fault in the north of the Cech magma source area into minerals barren in Tianshan Precambrian basement, and faults in the magmatic source south for enrichment of fluid and ore-forming elements of the accretionary complex and the Tarim passive continental margin sediments.

【作者单位】：国土资源部岩浆作用成矿与找矿重点实验室西安地质矿产研究所;长安大学地球科学与资源学院;
【基金】：国家自然科学基金项目(批准号:41602057) 中国地质调查局地质调查项目:乌兹别克斯坦、塔吉克斯坦及邻区矿产资源潜力评价(编号:121201011000150010)的成果
【分类号】：P588.11;P611
【正文快照】： 注:本文为国家自然科学基金项目(批准号:41602057)及中国地质调查局地质调查项目:乌兹别克斯坦、塔吉克斯坦及邻区矿产资源潜力评价(编号:121201011000150010)的成果。天山位于中亚造山带的南部边缘,自西向东延伸超过2500km,天山造山带的演化记录了包括岛弧、增生杂岩、海山以

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