摘要
沉积盆地内地层中碳的来源 ,根据其碳、氧同位素特征可归纳为 :海洋沉积碳酸盐碳、生物碳、热解非生物成因碳、大气淡水方解石碳和热卤水系统中的无机碳。热水成因的金矿及喷气 沉积矿床中的碳都具有深源成因的无机碳。
The carbon in sedimentary basins may be derived from: (1) marine carbonates; (2) organic carbon; (3) abiogenetic carbon from thermal degradation; (4) carbon from meteoric calcite, and (5) inorganic carbon in the thermal brine systems. The carbon both in the hydrothermal gold deposits and hydrothermally exhalative sedimentary deposits has a deep seated origin. The processes of deep seated inorganic carbon bearing hydrothermal fluids spouting onto the sea floor may be interpreted to be the leading factors for the formation of anoxic environments and ore bearing black shales at the bottom of extensional basins.
关键词
含矿缺氧盆地
碳同位素
沉积地层
成矿作用
ore bearing anoxic basin
carbon isotope
sedimentary strata
mineralization
