投稿时间：2013-05-23
修订日期：2014-06-23
网络发布日期：2014-09-15
中文摘要:文章总结了广西油麻坡钨钼矿床地质特征，将矿床的矿化类型大致划分为矽卡岩型白钨矿和石英脉型辉钼矿，两者是同一含矿热液不同阶段演化的产物，前者主要产在接触带的矽卡岩中，后者的产出不受岩性控制，多以网脉状充填在围岩裂隙中，并可见少量石英脉型辉钼矿体叠加在早期形成的矽卡岩型白钨矿体之上。本次研究对代表性钨钼矿石样品进行了C、H、O、S同位素测定，并对石英脉型辉钼矿矿石内的石英进行了包裹体的测定，结合油麻坡花岗闪长斑岩体的岩石学、矿物学及地球化学特征，认为成矿流体及矿质起初主要来源于斑岩体，在岩体上侵过程中，可能萃取了部分古生代地层中的成矿物质，热液演化后期伴随有大气降水的加入，使得成矿流体具有混源特征，流体体现为岩浆期后中高温-低盐度体系。
Abstract:The Youmapo W-Mo deposit in Guangxi province of Southwest China is located in the western part of the Bobai-Cenxi Faulted zone. It comprises skarn-type tungsten deposit and quartz-vein type molybdenum deposit. The tungsten-bearing skarn was produced by the replacement of carbonate layers intercalated in the Silurian schist and Devonian strata. While quartz-vein type molybdenum ore were formed along a group of fracture that cut through horizontal skarns and hornfelsed schist. C, H, O, S, Pb isotope geochemistry is discussed in this paper in an effect to understand the sources of the ore metals and ore-fluids. Combined with the the characteristics of petrology, mineralogy and geochemistry of Youmapo granodiorite porphyry, it can be conclude that the Metallogenetic material and ore-fluids was mainly derived from magma. The fluid inclusion studies indicate that the temperature and salinities vary from 130~450℃, w(NaCleq) from 0.18%~16.32%, respectively. The ore deposits is a medium-high hypothermal deposit and is dominated by hydrothermal fluid replacement.
keywords:geochemistry granodiorite porphyry fluid inclusion isotope geochemistry Youmapo W-Mo deposit Guangxi
文章编号：
中图分类号：P618.65;P618.67
文献标志码：
基金项目:本文得到广西壮族自治区地质矿产勘查开发局“广西陆川县米场钨钼矿床控矿因素、富集规律与成因机制研究”（编号：地勘[2006]）、中国地质调查局项目（编号：200811008）和国家科技支撑计划课题“工艺矿物学参数自动测试系统研制”（编号：2012BAB19B01）的联合资助
引用文本：
付强,葛文胜,温长顺,李生宝.2014.广西油麻坡钨钼矿床地球化学特征及成因探讨[J].矿床地质,33(4):785~794FU Qiang,GE WenSheng,WEN ChangShun,LI ShengBao.2014.Geochemistry and genesis of Youmapo W-Mo deposit in Guangxi[J].Mineral Deposits33(4):785~794
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