陕西省金厂沟金矿床地质及地球化学特征  

Geology and Geochemistry of Jinchanggou Gold Deposit in Shaanxi

作　　者：张孝攀 王权锋[1] 陈聆[1] 常鑫[1] 李霖杰[1] 

机构地区：[1]成都理工大学数学地质四川省重点实验室,成都610059

出　　处：《贵金属》2015年第1期29-35,共7页Precious Metals

基　　金：陕西省地质矿产勘查开发局2009年第三批地质勘查及科研专项基金项目(陕地财发[2009]34号)

摘　　要：金厂沟金矿是青木川-苍社金矿成矿带上最有价值的矿(床)点之一,该矿床赋存于青木川-关口垭韧性剪切带的碧口群二亚群三岩组第一岩性段(Pt2-3bk23-1),成矿地质条件好,找矿潜力巨大。通过对该矿床地质特征和矿石、含矿岩系以及围岩的化学成分、微量元素、稀土元素、流体包裹体和硫同位素特征的系统分析,初步认为矿体受控于韧性剪切带并且矿化与磁铁石英岩化、黄铁矿化等围岩蚀变关系密切,载金矿物为黄铁矿,成矿物质来源于地层围岩,黄铁矿中的硫为水岩过程中流体对碧口群源岩的萃取,金元素的富集可能经过了多个阶段,成岩与成矿处于不同时期。Jinchanggou gold deposit is one of the most valuable mineral （bed） points in the Qingmuehuan- Cangshe gold metallogenic belt, the deposit preserves in Qingrnuchuan-Guankouya ductile shear zone of Pt2-3bk2^3-l, and has good geological conditions and huge prospecting potential. Through the analysis of the geological characteristics of the deposit and ore, the ore beating rock series and the chemical composition of surrounding rock, trace elements, rare earth elements, fluid inclusions and sulfur isotopes, it was suggested that the ore bodies are controlled by ductile shear zone and mineralization is closely related to the magnetite quartzition, pyritization, etc. wall rock alteration. Pyrite is the gold carrying minerals and its sulfur extracts from Bikou Group source rocks in the process of fluid rock. The enrichment of gold element may pass through multiple stages. Diagenesis and mineralization has a different period.

关 键 词：矿山地质学 金厂沟金矿 地球化学特征 勉-略-宁 韧性剪切带 

分 类 号：P616[天文地球—矿床学] P595[天文地球—地质学]