| 王存柱.吉林省蛟河市新安屯钨钼矿流体包裹体、氢氧同位素及成矿时代研究[J].地质与勘探,2019,55(3):673-684 |
| 吉林省蛟河市新安屯钨钼矿流体包裹体、氢氧同位素及成矿时代研究 |
| Fluid inclusions, H-O isotope and metallogenic epoch of the Xin’antun W-Mo deposit in Jiaohe city, Jilin Province |
| 投稿时间：2018-08-19 修订日期：2019-01-04 |
| DOI：10.12134/j.dzykt.2019.03.001 |
| 中文关键词: 流体包裹体 氢氧同位素 成矿时代 新安屯钨钼矿 吉林省蛟河市 |
| 英文关键词: fluid inclusion, H-O isotope, metallogenic epoch, Xingantun W-Mo deposit Jiaohe, Jilin Province |
| 基金项目:中国地质调查局区域地质矿产调查项目（编号：DD2016007801） |
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| 中文摘要: |
| 吉林省蛟河市新安屯钨钼矿位于小兴安岭-张广才岭成矿带内，矿体呈细脉侵染状产于似斑状花岗闪长岩内，严格受北东向压扭性断裂构造控制。本文系统阐述了新安屯钨钼矿的区域地质背景、成矿地质特征，重点开展了流体包裹体、氢氧同位素及成矿时代等方面研究。结果表明，矿床成矿期流体均一温度180～235℃，流体盐度3.23～13.82%，密度0.875～0.975 g/cm3，成矿深度0.05～1.1km；成矿流体中δ18O为9.0～9.8‰，δD为-106.2‰～-116.3‰；采用LA-ICP-MS锆石U-Pb法获得含矿似斑状花岗闪长岩成岩年龄为195.4±1.2Ma；通过辉钼矿Re-Os 同位素法获得成矿年龄为180.5±3.9Ma。综合分析认为，该矿床成矿物质来自壳源，矿床类型属于断裂构造控制的浅成中低温岩浆热液型，成矿时代为早侏罗世，属于太平洋板块俯冲作用下的活动大陆边缘构造环境下的产物。 |
| 英文摘要: |
| The Xin’antun W-Mo deposit of Jiaohe city, Jilin Province is situated in the Xiaoxinganling-Zhangguangcailing metallogenic belt, where the ore body occurs in byporphyroid granodiorite with veinlet-disseminated shape, controlled by northeast-east trending compression-shear fault structure. This article elucidates the regional geologic background and metallogenic characteristics of this deposit, focusing on the study of fluid inclusions, H-O isotope and metallogenic epoch. Results show that the homogeneous temperature of fluids was 180~235℃, the salinity of fluids was 3.23～13.82%, fluid density was 0.875~0.975 g/cm3, metallogenic depth was 0.05～1.1km, and δ18O was 9.0~9.8‰ and δD is -106.2‰~-116.3‰in ore-forming fluid. The LA-ICP-MS zircon U-Pb age of ore-bearing byporphyroid granodiorite is 195.4±1.2Ma. The Re-Os isotopic dating yields an isochron age of 180.5±3.9Ma. Comprehensive analysis suggests that the mineralization matter originated from the crust. The deposit is of the meso-epithermal magmatic type controlled by fault structure. It was formed in early Jurassic, on an active continental margin under the subduction of the Paleo-Pacific plate. |
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