作者: R. L. Wang , W. D. Williams
关键词: Environmental chemistry 、 Carbonate 、 Sediment 、 Total organic carbon 、 Limnology 、 Environmental science 、 Biogeochemistry 、 Sulfate 、 Paleolimnology 、 Biogeochemical cycle
摘要: Biogeochemical studies were undertaken of a 65-cm long sediment core from Lake Cantara South, South Australia. 14C determinations indicated that the sediments had been deposited over 2000 years. Changes with depth in concentration or ratio following determined: (i) total organic carbon, carbonate (inorganic) sulfur, inorganic and atomic C/N, sulfate/chloride; (ii) n-alkanes; (iii) highly branched isoprenoid alkane, (iv) steroids. Interpretation changes nature took place when system changed protected marine lagoon to an isolated (athalassic) saline lake. This change about 1000 years ago.