| 周建厚.新疆祁漫塔格于沟子铁多金属矿辉钼矿Re-Os年龄及其地质意义[J].地质与勘探,2014,50(1):1-7 |
| 新疆祁漫塔格于沟子铁多金属矿辉钼矿Re-Os年龄及其地质意义 |
| Re-Os Dating of Molybdenite from the Yugouzi Fe-Cu(Mo) Deposit in Qimantage, Xinjiang and Its Geological Implications |
| 投稿时间：2013-11-19 修订日期：2013-12-06 |
| DOI： |
| 中文关键词: 辉钼矿Re-Os定年 普通Os 于沟子铁多金属矿 祁漫塔格 东昆仑 |
| 英文关键词: Re-Os dating of molybdenite, Common Os, Yugouzi Fe-Cu(Mo) deposit, Qimantage, Eastern Kunlun |
| 基金项目:中国地质调查局地质调查项目（1212011085528）、国家自然科学基金项目（批准号：41172076）和中国地质调查局高层次地质人才培养计划（201309）、青年地质英才计划（201112）联合资助 |
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| 中文摘要: |
| [摘 要]于沟子铁-稀有多金属矿区位于东昆仑祁漫塔格矿集区西段，其中铁铜（钼）多金属矿体主要分布于正长花岗岩与狼牙山组碳酸盐岩的接触带矽卡岩内，属于矽卡岩型铁铜（钼）多金属矿床，而铌（铷）等稀有-稀土矿化带分布于正长花岗岩和二长花岗岩内。通过对于沟子铁铜（钼）多金属矿体内磁铁矿石中的辉钼矿Re-Os定年表明，辉钼矿中含有对Re-Os定年产生较大影响的普通Os，在扣除普通Os后，辉钼矿Re-Os等时线年龄为（210.1±4.8）Ma（n=5，MSWD=0.37），厘定了其成矿年龄为晚三叠世，是东昆仑祁漫塔格印支期大规模成矿的产物。 |
| 英文摘要: |
| Abstract: The Karamaili ductile-brittle shear structural belt was formed in the middle-late Variscan time, which can be divided into two different tectonic deformation periods the collision extrusion period and post-collision strike-slip extension period, corresponding to four major evolutionary stages of thrust nappe, left-lateral strike-slip, right-lateral strike-slip and extension. Gold mineralization occurred in thrust nappe type ductile shear zone of the collision period, and metallogenesis occurred in the late post-collision period, C2-P(290～260Ma), belonging to right-lateral strike-slip and extensional deformation stage. The tectonic deformation control on gold mineralization in space is expressed by geological discontinuity between the ductile-brittle and brittle deformation in the shallow subsurface and ductile deformation at depth. The gold mineralization kept up with the ductile-brittle and brittle deformation and had a significant superposition relationship with the ductile deformation. Ductile-brittle and brittle structure controlled ore body unified in the right-lateral strike-slip shear and extensional system, with different deformation levels, deformation characteristics and mineralization characteristics. Superposition relationships between tectonic deformation and gold mineralization in space have two mineralization time response and multi-stage metallogenic records, which showed superimposed and complex mineralization in time successively, spatial superposition and material various sources. The compression-extension conversion process of regional tectonic background was the formation mechanism of ductile-brittle deformation conversion and gold mineralization. Geodynamic background of mineralization contains thrust-nappe type ductile deformation in the collision orogenic stage, right-lateral strike-slip type ductile-brittle deformation and gold initial mineralization in collision orogenic compression-extension conversion stage, brittle deformation and main gold mineralization in extension orogenic stage. The study on the relationship between gold mineralization, time, and material around geological bodies indicates that the gold mineralization was jointly controlled by source beds of volcanic host rocks, tectonic deformation evolution and alkaline granitic intrusion activities in the late Variscan time. |
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