黔西南灰家堡金矿田有机岩相学和地球化学  

Organic petrography and geochemistry of the Huijiabao gold field,Southwestern Guizhou

作　　者：彭义伟[1] 顾雪祥[1] 吴程赟[1] 章永梅[1] 陈思尧[1] 

机构地区：[1]中国地质大学地质过程与矿产资源国家重点实验室,北京100083

出　　处：《地学前缘》2013年第1期117-128,共12页Earth Science Frontiers

基　　金：国家自然科学基金项目(40930423;40873036);国家重点基础研究发展计划"973"项目(2009CB421003-01);长江学者和创新团队发展计划;高等学校学科创新引智计划项目(B07011)

摘　　要：灰家堡金矿田是黔西南卡林型金矿床的集中产地之一,对其中的水银洞、紫木凼、太平洞和簸箕田4个代表性金矿床进行了有机岩相学和地球化学研究。灰家堡金矿田的矿床中固体沥青主要产于矿石内,与矿化关系密切,产出形态受孔隙、构造裂隙控制;沥青与热液期矿物的共生组合关系表明其形成时间与成矿时间大致一致。矿石中普遍发育有机质包裹体。有机地球化学特征表明,金矿石和围岩中的有机质成熟度均较高,经历了类似的地质作用过程;有机质形成于强还原、中低盐度的沉积环境;有机质来源以海相菌藻类等低等生物为主,有少量陆源高等植物的输入。The Huijiabao gold field is one of the major production areas of Carlin-type gold deposits in South- western Guizhou Province. Studies of organic petrography and geochemistry were carried out on the four rep- resentative gold deposits, including Shuiyindong, Zimudang, Taipingdong and Bojitian. Solid bitumen occur- ring in the Huijiabao gold field is commonly hosted by mineralized rocks, filling fractures and open spaces. Paragenetic relationship between bitumen and hydrothermal minerals indicates that bitumell formed simultane- ously with gold. Abundant hydrocarbon inclusions were found in the ores. Organic geochemical characteristics imply that organic matters in ores and host rocks have a similar high maturity, and underwent a similar geological process. Organic matter was formed in a sedimentary environment of high reduction and medium-low salinity, and was mainly sourced from marine bacteria and algae and a small amount from continental organic matter.

关 键 词：固体沥青 有机质包裹体 有机地球化学 灰家堡金矿田 黔西南 

分 类 号：P618.51[天文地球—矿床学]