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.
出处
《桂林理工大学学报》
CAS
北大核心
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)
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
steroids
biomarker
geological thermal events
mineralization information
gold deposit
northwest Guangxi
