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赣南地区石英脉型钨矿成矿流体特征()

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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:: 37
期数:: 2016年02期

页码:: 136-146

栏目:: 矿床地质

出版日期:: 2016-06-15

文章信息/Info

Title:: Ore-forming fluids characteristics of quartz-vein tungsten deposits in southern Jiangxi Province

文章编号:: 2096-1871(2016)02-136-11

作者:: 周龙全; 李光来; 唐傲; 苏晔; (东华理工大学核资源与环境省部共建国家重点实验室培育基地,南昌 330013)

Author(s):: ZHOU Long-quan; LI Guang-lai; TANG Ao; SU Ye; (State Key Laboratory Breeding Base of Nuclear Resources and Environment, East China Institute of Technology, Nanchang 330013,China)

关键词:: 石英脉型钨矿; 成矿流体; 赣南地区

Keywords:: quartz-vein type tungsten deposit; ore-forming fluid; southern Jiangxi Province

分类号:: P611

DOI:: 10.16788/j.hddz.32-1865/P.2016.02.008

文献标志码:: A

摘要:: 赣南是我国钨矿床最密集的地区,尤以石英脉型钨矿最为发育。本文通过分析近年来该区石英脉型钨矿流体包裹体类型、流体包裹体特征、显微测温、激光拉曼光谱等方面的最新成果,结合碳、氢、氧及锶同位素的研究成果,探讨赣南石英脉型钨矿的流体特征,重点探讨石英脉型钨矿形成过程中的流体演化。认为赣南石英脉型钨矿成矿流体主要来源于岩浆水,流体演化始于高温高盐度的岩浆—热液过渡阶段,与黑钨矿沉淀密切相关的流体温度主要集中于260～360 ℃,盐度主要集中于4～9 wt% NaCl eq.,属中—低盐度、富含SiO₂、挥发组分及多种成矿元素的热液体系; 矿质主要以流体沸腾和混合作用为主,自然冷却仅为少数矿床的主要矿石沉淀机制。

Abstract:: Southern Jiangxi is one important cluster of tungsten deposits in China, especially for hosting well developed quartz-vein tungsten deposits. Through analyzingthe latest research achievements of fluid inclusion types, ore-forming fluids characteristics of the quartz-veins tungsten deposit, microthermometry and Raman spectroscopy, and combined with research results of C, H, O and Sr isotope compositions, this study discussed the characteristics of ore-forming fluids of quartz-vein tungsten deposits in southern Jiangxi Province, with an emphasis on the fluid evolution during the mineralization of quartz-vein tungsten deposits. The ore-forming fluids indicated by this study would originate from magmatic waters with the ore-forming fluid evolution beginning at magmatic hydrothermal transitional stage of high temperature and high salinity. The temperature and salinity of fluids related to wolframite mineralization are around 260～360℃ and 4～9 wt%NaCl eq., respectively, suggesting that the ore-forming fluids belonged to a mid-low salinity hydrothermal system enriched in SiO₂, volatile components and ore-forming elements. The ore-forming mechanism in this area was dominated by fluid boiling and mixing, with minor deposits resulting from the ore precipitation due to fluid cooling.

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备注/Memo

备注/Memo:: 基金项目:国家自然科学基金项目(41302053),博士启动资金(DHBK201120)资助。
第一作者简介:周龙全,1987年生,男,研究生,矿产普查与勘探专业。通讯作者简介:李光来,1983年生,讲师,硕士生导师,主要从事花岗岩与成矿作用研究。

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