摘要
撰山子金矿床产出在赤峰-朝阳矿集区北段,是赤峰地区唯一位于兴蒙造山带内的金矿床,构造-岩浆控矿作用明显。金矿化主要受断裂控制,呈脉状、细脉状产出,矿化至少经历了三个阶段:黄铁矿-石英阶段、石英-硫化物阶段和石英-碳酸盐阶段。本次主要开展对撰山子矿区的矿(岩)石硫同位、铅同位素和氢氧同位素研究,讨论撰山子金矿床的基本特征及成因机制。研究结果表明:撰山子成矿流体主要以岩浆水和大气降水的混合水为特征,矿石中的硫和铅主要源于岩浆,部分继承了围岩的特征。需要指出的是,矿石铅同位素和撰山子岩体铅同位素组成具有良好的相似性,指示其具有同源性的成因联系。因此,撰山子金矿床可能为深部大规模富金的烧锅营子岩浆侵入活动的晚期隆起(撰山子岩体)的产物,可能为一个典型的与侵入岩有关的金矿床,而非造山型金矿。
Zhuanshanzi gold deposit,located in the northern section of ChiFeng-Zhaoyang ore-concentrated area, is the only middle-sized deposit in Mongolia-Hinggan Orogen in Chifeng area. It is controlled by tectono-magma obviously. Au-polymetallic mineralization occurs mainly as sheeted, veinlet,vein type bodies in the v forms （long） pod-like and lenticular orebodies. Preliminary studies show that Mineralization experienced three stages at least： quartz-pyrite stage, quartz - sulfides stage and quartz - carbonatestage. Hydrogen and oxygen isotopes suggest that the ore-forming fluid of Zhuanshanzi Au deposit may be a mixing of magmatic fluids with modified meteoric water. It is thus inferred that the lead and sulfur in ores from Zhuanshanzi deposits might have mainly come from magma, from the surrounding rock Partly. Further speaking,the lead isotopic composition of ores and Zhuanshanzi intrusion stock Have good comparability,Indicating its genetic relationships with homology. Zhuanshanzi gold deposit may be related to calcium alkaline magma hydrothermal activity and then formed hydrothermal vein type gold deposits , and it may be intrusion- related gold deposits ,not be a Orogenic-type gold deposits.
出处
《地质学报》
EI
CAS
CSCD
北大核心
2016年第8期1798-1816,共19页
Acta Geologica Sinica
基金
973项目(编号:2013CB429805)
国家自然科学基金重点项目(编号:41030421)共同资助
关键词
矿床地球化学
与侵入体有关金矿床
兴蒙造山带
撰山子
金矿
geochemistry of mineral deposit
IRGS-type deposit
Mongolia-Hinggan orogen
Zhuanshanzi
gold deposit
