中南大学学报（自然科学版）2018，Vol.49Issue(4)：901-909,9.DOI:10.11817/j.issn.1672-7207.2018.04.018
河北平泉下金宝金矿床载金矿物特征及其成矿指示意义
Characteristics of gold-bearing minerals in Xiajinbao gold deposit of Hebei and their metallogenic indicating significance
摘要
Abstract
Xiajinbao gold deposit is located in the Yong'an—Xiayingfang—Maojiagou poly-metallic belt, which has favorable metallogenic geological condition. According to systematic petrography observation and in situ elemental analysis by X-ray electron probe microanalyzer(EPMA), Xiajinbao gold deposit occurrence and the ore-forming environment and genesis of gold-bearing minerals were studied. The results show that the visible gold particle has a size of 0.005?0.053 mm in diameter. Fine grained gold composes more than 80% of the total minerals, which occur as mineral inclusions in the fractures or among the particles of the gold-bearing minerals. Major gold-bearing minerals include gold, electrum, pyrite and sphalerite. The "invisible gold" mainly exists in the form of mechanically-mixed "invisible" microscopic- ultramicroscopic gold inclusions, as well as solid solution(lattice gold).The molar ratio of x(As)/(x(As)+x(Sb)) of tetrahedrite is above 0.25. The mass fraction of gold of electrum ranges from 73.512% to 80.120%. The mass fraction ratio ofw(Zn)/w(Cd) of sphalerite ranges from 79.82 to 145.33, indicating that the deposit is formed in an epithermal moderate-low temperature environment. Major and trace element features of pyrite and sphalerite indicate that the Xiajinbao gold deposit is a moderate-low temperature hydrothermal gold deposit related to magmatic activities.关键词
电子探针/赋存状态/成矿环境/矿床成因/下金宝金矿床Key words
electron probe microanalyzer(EPMA)/occurrence/ore-forming environment/genesis/Xiajinbao gold deposit分类
天文与地球科学引用本文复制引用
张建国,邵拥军,汪程,刘忠法,熊伊曲..河北平泉下金宝金矿床载金矿物特征及其成矿指示意义[J].中南大学学报（自然科学版）,2018,49(4):901-909,9.基金项目
国家自然科学基金资助项目(41472302) （41472302）
中南大学创新驱动计划项目(2015CX008)(Project(41472302) supported by the National Natural Science Foundation of China （2015CX008）
Project(2015CX008) supported by the Innovation-driven Plan of Central South University) （2015CX008）
