河南新县宝安寨铂矿床流体包裹体研究*

南京大学学报(自然科学版) ›› 2012, Vol. 48 ›› Issue (6): 709–718.

河南新县宝安寨铂矿床流体包裹体研究*

陈伟，徐兆文**，李红超，陈进全，王浩，王少华

出版日期:2015-07-30 发布日期:2015-07-30
作者简介: (内生金属矿床成矿机制研究国家重点实验审:南京大学地球科学与工程学院，南京,210093)
基金资助:
国家自然科学基金(40973030)

Fluid inclusions of the Baoanzhai Mo deposit in southern Henan
Province，eastern China

Chen Wei，Xu Zhao-Wen，Li Hong-Chao，Chen Jin-Quan，Wang Hao，Wang Shao-Hua

Online:2015-07-30 Published:2015-07-30
About author: (State Kcy Laboratory for Mineral Deposit Rescarch,School of Earth Sciences and Engineering,
Nanjing University,Nanjing,210093,China)

摘要/Abstract

摘要： 河南省新县宝安寨钥矿床位于大别造山带西部，属于斑岩型钥矿床.木文对主成矿期矿化石英脉进行了流体包裹体岩相学观察和显微测温.研究表明，捕获的流体包裹体可分为富液相两相水溶液包裹体、富气相两相水溶液包裹体和含子矿物三相水溶液三类包裹体.包裹体均一温度的峰值为220?C一240?C，盐度峰值分别为2%-4%(NaCl_eq)低盐度区间和46%-48%(NaCl_eq)含子晶的高盐度区间，密度为0. 58 g/cm³-1. 05 g/cm³.激光拉曼光谱分析表明，流体包裹体的组分简单，以水蒸汽为主，含有少量的CO₂.包裹体具有典型的氧同位素漂移特征，指示岩浆热液和大气降水混合作用.因此，我们认为宝安寨钥矿床属中一高温浅成热液矿床，流体混合作用可能是矿床形成的主要机制.

Abstract: The Baoanzhai Mo deposit in southern Henan province is located in western part of the Dabic orogen eastern China,is a porphyry Mo deposit. We investigated the petrography and micro-thermometry of the fluid inclu lions in the quartz veins related to the main mineralization stage and identified three types of fluid inclusions aqueous-rich two-phase inclusions,vapor-rich two-phase inclusions，and daughter-mineral-bearing threrphase inclu lions. Our results indicate that the peak homogenization temperatures are 220?C一240?C，while the peak salinitics range in two intervals of 2%一4%< NaCI_eq)and46%一48%(NaCI_eq)，respectively. The densities of fluid vary from 0.58g/cm³ to 1.05g/cm³ .Studies based on Raman spectra indicate that the inclusions are dominated by water vapor
with minor CO2.The existence of typical shift in oxygen isotopes suggests a likely mixing event between magmatic and meteoric water, In summary,we believe that the deposit was formed in an intermediate-high temperature epither- mal environment,and the fluid mixing played a crucial role in the mineralization.

陈伟，徐兆文**，李红超，陈进全，王浩，王少华
. 河南新县宝安寨铂矿床流体包裹体研究*[J]. 南京大学学报(自然科学版), 2012, 48(6): 709–718.

Chen Wei，Xu Zhao-Wen，Li Hong-Chao，Chen Jin-Quan，Wang Hao，Wang Shao-Hua
. Fluid inclusions of the Baoanzhai Mo deposit in southern Henan
Province，eastern China
[J]. Journal of Nanjing University(Natural Sciences), 2012, 48(6): 709–718.

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