新疆东天山白山钼矿床流体包裹体研究

CORC > 北京大学 > 地球与空间科学学院

	新疆东天山白山钼矿床流体包裹体研究; Fluid inclusion study of the Baishan porphyry Mo deposit in the eastern Tianshan ore field, Xinjiang Province
	项楠 ; 杨永飞 ; 吴艳爽 ; 周可法
刊名	岩石学报
	2013
关键词	流体包裹体斑岩钼矿床白山钼矿床东天山大陆碰撞 Fluid inclusion Porphyry Mo deposit Baishan Mo deposit East Tianshan Continental collision
英文摘要	白山钼矿位于东天山觉罗塔格成矿带东段,是新疆极具代表性的大型-超大型斑岩钼矿.根据矿物共生组合和脉体穿插关系,脉体发育顺序依次为:早期石英-钾长石脉、石英-钾长石-辉钼矿脉、石英-辉钼矿脉、石英-多金属硫化物脉和晚期石英-碳酸盐-萤石脉.早期石英-钾长石脉中主要发育纯CH4包裹体(PC型)、CH4-H2O型包裹体(C1型)和水溶液包裹体(W型),均一温度集中在320 ～420℃,盐度为1.98％～ 8.79％ NaCleqv；石英-钾长石-辉钼矿脉中发育含子晶包裹体(S型)和W型包裹体,均一温度集中在260～ 400℃,盐度为1.49％～8.65％ NaCleqv；石英-辉钼矿脉和石英-多金属硫化物脉发育W型、S型和CO2-H2O型包裹体(C2型),均一温度分别为200～ 240℃和140 ～ 240℃,盐度分别为2.14％～8.10％ NaCleqv和0.33％～ 10.22％ NaCleqv,不包括不熔子矿物的贡献；晚期石英-碳酸盐-萤石脉只发育W型包裹体,均一温度和盐度明显下降,分别为100～ 160℃和0.17％～4.86％ NaCleqv.估算的石英-钾长石脉体和石英-多金属硫化物脉形成压力分别为105 ～ 221 MPa和15 ～ 285MPa.成矿流体由高温、富碳质、还原的岩浆流体向低温、低盐度、贫碳质的大气降水热液演化.成矿阶段温度下降,早期流体中的CH4还原HMoO4-的高价钼,从而形成辉钼矿,可能是导致成矿物质沉淀的重要因素.; The Baishan Mo deposit in the eastern Tianshan, Xinjiang Province, is a large-giant porphyry deposit discovered in the eastern Jueluotag tectonic belt. According to paragenesis and crosscutting relationship of the stockworks, ore-forming veinlets in order from early to late are the early quartz-potassic feldspar veinlets, quartz-potassic feldspar-molybdenite veinlets, quartz-molybdenite veinlets, quartz-polymetallic sulfide veinlets and the late stage quartz-carbonate-fluorite veinlets. The hydrothermal quartz in the early quartz-potassic feldspar veinlets mainly contain pure CH4 (PC-type), CH4-H2O (Cl-type) and NaCl-H2O (W-type); these fluid inclusions mainly homogenize at temperatures of 320 degrees C to 420 degrees C, and yield salinities of 1.98% to 8.79% NaCleqv. The quartz-potassic feldspar-molybdenite veinlets contain daughter mineral-bearing (S-type) and W-type fluid inclusions, with homogenization temperatures ranging from 260 degrees C to 400 degrees C and salinities of 1.49% to 8.65% NaCleqv. The quartz-molybdenite veinlets and quartz-polymetallic sulfide veinlets contain W-, S- and C-2 (CO2-H2O) types of fluid inclusions that axe generally homogenized at temperatures of 200 degrees C to 240 degrees C and 140 degrees C to 240 degrees C, with salinities of 2.14% to 8.10% NaCleqv and 0.33% to 10.22% NaCleqv,, respectively. The late-stage quartz-carbonate-fluorite veinlets only contain the W-type fluid inclusions mainly which homogenize at 100 degrees C to 160 degrees C, yielding salinities of 0.17% to 4.86% NaCleqv. The estimated pressures range from 105 similar to 221MPa for the early-stage veinlets to 15 similar to 285MPa for the quartz-polymetallic sulfide veinlets. In a word, the ore-forming fluids evolve from high temperature, carbonic and reducing magmatic to low temperature and low salinity meteoric. The decrease of temperature and the reduction of high-valent molybdenum of HMoO4- result in the precipitation of molybdenite.; 国家自然科学基金项目; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000315130500011&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 16; 1; 146-158; 29
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/290645]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	项楠,杨永飞,吴艳爽,等. 新疆东天山白山钼矿床流体包裹体研究, Fluid inclusion study of the Baishan porphyry Mo deposit in the eastern Tianshan ore field, Xinjiang Province[J]. 岩石学报,2013.
APA	项楠,杨永飞,吴艳爽,&周可法.(2013).新疆东天山白山钼矿床流体包裹体研究.岩石学报.
MLA	项楠,et al."新疆东天山白山钼矿床流体包裹体研究".岩石学报 (2013).