川西北地区金矿成矿条件  

METOLLOGENIC CONDITIONS FOR GOLD DEPOSITS IN THE NORTHWEST SICHUAN PROVINCE

作　　者：刘桂阁[1,2] 王恩德[1] 陈勇敢[2] 常春郊[2] 丛润祥[2] 张惠玉[2] 李艳秋[2] 朝银银[2] 

机构地区：[1]东北大学资源土木工程学院,沈阳110004 [2]武警黄金地质研究所,河北廊坊065000

出　　处：《地质找矿论丛》2010年第1期5-11,共7页Contributions to Geology and Mineral Resources Research

基　　金：中国地质调查局地质大调查项目(编号1212010781013)资助

摘　　要：四川省西北部是我国岩金矿床分布的重点地区之一,尤以微细浸染型金矿床为主。该区有刷经寺联合村、嘎拉、金木达等大中型与超大型金矿床,显示出金矿成矿的良好前景。研究区处于古特提斯东缘的被动陆缘,为稳定大陆边缘海湾或封闭的海湾浊流盆地环境。浊积岩沉积形成金的初步富集,并在印支期发生低温动力变质,成为微细浸染型金矿的主要矿源层。岩浆活动沿区内构造边缘破裂带发生,形成构造岩浆岩带,并与金及多金属成矿有着密切的关系。双向收缩的造山运动为金成矿提供了区域构造条件,韧脆性剪切带控制了金矿的分布,并为成矿提供了主要的热动力。The northwest Sichuan province is one of the key regions where the primary gold deposits dominated by the micro-disseminated type of gold deposit are concentrated, such as the large and medium sized micro-disseminated gold deposits at Lianhecun, Gala, Jinmuda etc. and the metallogenic conditions for primary gold deposits is prospective. The study area is situated at the passive continental margin of the east Palaeo-Tethys margin. Here is the stable contiment-margional bay or close bay tubulent basin sedimentary environment. Gold is primarily enriched in the turbidite which was exposed to low temperature dynamic metamorphism during Indo-China period and becomes the source bed of the micro-disseminated gold deposits and magmatism occurs at the margional cataclastic zones as tectonic-magmatic zones and is associated with gold and poly-metal ore. The tectonic movement supply heat source for formation of the gold deposits. The gold deposits were formed under the bi-directional shrinked orogenic backgroumd and controlled by the britle-ductile shear zones. Remote sensing techniques are combined with geochemical survey for location of the gold ore prospecting targets.

关 键 词：川西北 金矿床 剪切带 微细浸染 找矿方向 

分 类 号：P612[天文地球—矿床学] P618.51[天文地球—地质学]