Carbon Isotope Composition of Carbonaceous Matter from the Precambrian of the Witwatersrand System
Carbon Isotope Composition of Carbonaceous Matter from the Precambrian of the Witwatersrand System
复制标题
威特沃特斯兰德系统前寒武纪碳质的碳同位素组成
作者：
J. Hoefs;M. Schidlowski
威特沃特斯兰德系统（南非）金铀砾岩中出现的聚合碳氢化合物的 δC13 值在每千分之 22.4 和 32.8 之间，因此它们的同位素组成属于沉积有机碳范围。因此，该材料的有机衍生似乎很有可能。这一结论与有机进化和生物活动的存在时间肯定早于 2.15 x 109 年的模型一致。
Polymerized hydrocarbons occurring in the gold-uranium conglomerates of the Witwatersrand System (South Africa) show δC13 values between —22.4 and —32.8 per mille, their isotopic composition thus falling into the range of sedimentary organic carbon. Accordingly, organic derivation of the material seems very probable. This conclusion is consistent with a model of the existence of organic evolution and biologic activity in times certainly older than 2.15 x 109 years.