南京大学学报（自然科学版）2018，Vol.54Issue(2)：336-350,15.DOI:10.13232/j.cnki.jnju.2018.02.009
赣南茅坪钨矿黑钨矿及共生石英中流体包裹体组合(FIA)研究
Study on the fluid inclusion assemblages(FIA)from coexisting wolframite and quartz in Maoping tungsten deposit,southern Jiangxi province
摘要
Abstract
The Maoping tungsten deposit,as one of the largest deposits in southern Jiangxi province,comprises two types of ore-bodies,i.e.wolframite-quartz vein type ore-body and greisenized-granite disseminated type ore-body.In this paper,wolframite-quartz vein type ore-body was studied using prevailing fluid inclusion assemblage(FIA) method.Microthermometry and Laser Raman spectrum analysis were conducted on fluid inclusions in coexisting quartz and wolframite,respectively.Results show that the homogenization temperatures for primary inclusions in wolframite(type Iwa)are generally higher than those in quartz(type Ia),implying wolframite most likely formed ear-lier than most of the coexisting quartz.Wolframite and coexisting quartz have experienced different fluid processes in the hydrothermal system.Fluid immiscibility and fluid mixing take place in quartz but only simple cooling happens in wolframite.As infrared microthermometric studies of wolframite provide more pertinent information regarding ore formation,the principal tungsten depositional mechanism is simple cooling.Except the common presence of pri-mary fluid inclusions in wolframite(type Iwa),we have found some secondary fluid inclusions in wolframite(type Iwb).Type Iwb inclusions in wolframite have homogenization temperature similar to type Ia inclusions in coexisting quartz,indicating that quartz-forming fluids were preserved as post-precipitation secondary inclusions in wolframite.关键词
流体包裹体组合/黑钨矿/石英/茅坪钨矿/赣南Key words
fluid inclusion assemblage/wolframite/quartz/Maoping tungsten deposit/southern Jiangxi province分类
天文与地球科学引用本文复制引用
陈莉莉,倪培,王国光,李文生,杨玉龙..赣南茅坪钨矿黑钨矿及共生石英中流体包裹体组合(FIA)研究[J].南京大学学报（自然科学版）,2018,54(2):336-350,15.基金项目
国家重点研发计划(2016YFC0600205),国家自然科学基金(2012CB416706) （2016YFC0600205）
