Isotope systematics and metallogenetic age of Zhuanghe gold deposit, Liaoning province, China

Based on the metallogenetic geology conditions, the H, O, C and S isotopic compositions were measured by MAT-251 mass spectrometer, and Pb isotope and Rb-Sr dating were carried with MAT-261 multi-acceptor mass spectrometer. The results show that the δ18O values of gold-bearing vein quartz from different levels are 1.19%-1.42%. The calculated δ18O values of ore fluids are 0.55%-0.78%, and δD values are from –8.64% to –6.66%. The calculated values of δ 34 SH2Sby the δ34Spy values in quartz veins display sulfur isotope compositions from -0.053% to 0.413%. Carbon isotope compositions of carbonates are from -0.612% to 0.140%. The mole ratios of 206Pb to 204Pb, 207Pb to 204Pb and 208Pb to 204Pb in auriferous quartz vein are 16.987-17.545, 15.342-15.623, and 38.254-38.744, respectively. The age of the Zhuanghe gold deposit determined by Rb-Sr isochron of the fluid inclusions in quartzes is (143.0±5.8) Ma. These isotopic data suggest that the metallogenetic fluids are generated from magmatic hydrotherm and the origin of ore-forming matters is related to the deep-derived magmatic activities. Meanwhile, the metallogenetic epoch of the Zhuanghe gold deposit is in Yanshanian period.     

内蒙古赤峰红花沟金矿田控矿构造体系分析

以区域地质背景研究为前提，提出“赤峰云雾山区域性帚状构造系”的概念，运用地质力学分析方法，指出控矿构造为新华夏体系的第二序次，不同级别的构造对该地区金矿的生成以及矿区矿脉的分布起了决定作用。     

中国浅成低温热液型金矿床地质特征及研究现状

自20世纪70年代环太平洋地区发现大批浅成低温热液型金矿以来,浅成低温热液型金矿已经成为当前金矿地质研究的热点,它也是目前世界上最为重要的金矿床类型之一。浅成低温热液型金矿床的形成时代受其所处大地构造环境演化的控制。一般产于岛弧环境或大陆边缘环境的中—酸性陆相火山岩系及相邻岩石中。根据矿物组合及蚀变特征,浅成低温热液型金矿床可划分为高硫化型和低硫化型。高硫化型浅成低温热液金矿床与斑岩型铜—金矿床往往密切共生,它们可能是同一成矿系统的产物。理论上,中国浅成低温热液型金矿的成矿条件比较优越,找矿前景广阔。     

若干成矿预测理论研究综述

成矿预测研究一直是矿床勘查研究的热点,对现代矿产勘查与评价实践具有重要的指导意义。近年来据成矿预测理论的研究进展,对相似类比预测理论、地质异常预测理论、成矿系列理论及成矿系统理论、矿床成因模式理论、综合信息成矿预测理论等研究现状及进展进行了全面的综述,概述了成矿预测理论发展的趋势,认为未来一定时期内,成矿预测方法研究将会向定量化、精细化方向发展,深部隐伏矿床(体)的"定位"预测是主要的研究方向。     

黑龙江老柞山金矿地球化学特征及成因模式

老柞山金矿是黑龙江重要的黄金产地之一。本文对该金矿床的成矿地质背景和硫同位素、铅同位素、碳和氧同位素的组成特征进行了分析研究。结果显示成矿流体类型为来源于壳幔同熔的混合含矿岩浆热液,成矿物质主要来自幔源或少量地壳物质。矿石和岩浆岩具有非常相似的铅同位素组成,暗示了二者的亲缘关系。在综合已有地质资料的基础上,对矿床的成因模式进行了总结,强调该矿床的形成是多次构造岩浆逐步富集而成。