我国藻菌生物成因的金矿研究

RESEARCHES ON ALGAE-BACTERIA GENETIC GOLD DEPOSITS IN CHINA

生物成矿作用分为生物直接成矿作用和生物间接成矿作用。生物直接成矿作用的标志结构为生物有机肢体结构，生物间接成矿作用的标志结构为“矿交代生物”结构。我国陕西二台子-半仓为金矿、四川东北寨金矿、川甘拉尔玛金矿和云南金厂金矿等均为典型实例。矿石中普遍含多种金属矿物生物结构，还含多种生物有机组分。成矿物质具多源性特征，流同位素具混合型特征。矿床成矿机制可与“人工碳吸附系统”聚全机制相类比。含金层位可称为“天然碳吸附系统”层位。

Biomineralizations are divided into direct and indirect one. The indicator texture ofdirect biomineralization is biological organic colloid texture, and the indicator texture ofindirect biomineralization is 'mineralized biological texture'. There are some such typicalgold deposits as Ertaizi-Bancanggou of Shanxi Province, Dongbeizhai of Sichuan Province,Laerma of Sichuan tand Gansu Province and Jinchang of Yunnan Province etc. Ores in thesedeposits generally include various metallic mineral biomorphic textures and biological organicconstituents. The ore-forming materials are of multiple sources, and its sulfer isotope is ofmixed type. The genetic machanism of these deposits is similar to that of gathering-gold in'artificial carbon absorption system'. The auriferous reef can be called the stratohorizon of natural carbon absorption system'.