甾族化合物的生物成矿学意义——以桂西北卡林型金矿为例  

Tracer Significance of Steroids for Bio-Mineralization——A Case Study on Carlin Gold Deposit in Northwest Guangxi

作　　者：黄同兴[1,2] 杨振[1] 胡明安[1] 夏金龙[1] 

机构地区：[1]中国地质大学资源学院,武汉430074 [2]广西区地质矿产勘查开发局,南宁530023

出　　处：《桂林理工大学学报》2012年第4期455-461,共7页Journal of Guilin University of Technology

基　　金：广西地质矿产勘查开发局合作项目(GH076271)

摘　　要：甾族化合物是一种重要的生物标志化合物,根据有机地球化学理论,利用甾族化合物可以示踪地质热事件。以桂西北卡林型金矿为例,根据甾族化合物的地球化学特征,结合有机质镜质体反射率数据,研究了桂西北地区甾族化合物与卡林型金矿成矿的关系。结果表明,桂西北卡林型金矿床中有机质主要来源于真核生物,并且有陆源有机质混入,反映当时矿区沉积环境为陆缘浅海或大陆斜坡的沉积条件;有机质成熟度较高,为成熟-过成熟阶段;右江沉积盆地具有较高的古地热场,可能为其后金的成矿作用准备了热能和有机化合物;沉积岩的深埋增温是影响右江盆地有机质演化的主要地质热事件。Steroid is an important kind of biomarker.According to the theory of orangic geochemistry,it is used to trace the geological thermal events.This paper is devoted to investigating the metallogenic significance of steroids,taking carlin type gold deposit of northwest Guangxi province as examples.Our conclusion from the test is that the organic matters mainly root in eukaryotic biology,interfused with organic matters from land,reflecting that the sedimentary environment is neritic facies.The organic matters have a high maturation,showing that Youjiang basin has an upper ancient geothermal field,and providing heat and organic compound for the mineralization of gold deposits.The deep warming of sedimentary rock is the main geological thermal event,for the evolution of the organic matters of Youjiang basin.

关 键 词：甾族化合物 生物标志化合物 地质热事件 成矿意义 金矿 桂西北 

分 类 号：P618.51[天文地球—矿床学] P593[天文地球—地质学]