Biogeochemical changes in the sediments of Lake Cantara South, a saline lake in South Australia

作者: R. L. Wang , W. D. Williams

DOI: 10.1023/A:1012225311553

关键词: Environmental chemistryCarbonateSedimentTotal organic carbonLimnologyEnvironmental scienceBiogeochemistrySulfatePaleolimnologyBiogeochemical 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.

参考文章(22)
Peter D. Nichols, Anna C. Palmisano, John K. Volkman, Glen A. Smith, David C. White, OCCURRENCE OF AN ISOPRENOID C25 DIUNASATURATED ALKENE AND HIGH NEUTRAL LIPID CONTENT IN ANTRACTIC SEA‐ICE DIATOM COMMUNITIES1 Journal of Phycology. ,vol. 24, pp. 90- 96 ,(2008) , 10.1111/J.1529-8817.1988.TB04459.X
Fabien Kenig, Alain Y. Huc, Bruce H. Purser, Jean-Louis Oudin, Sedimentation, distribution and diagenesis of organic matter in a recent carbonate environment, Abu Dhabi, U.A.E. Organic Geochemistry. ,vol. 16, pp. 735- 747 ,(1990) , 10.1016/0146-6380(90)90113-E
John K. Volkman, Stephanie M. Barrett, Graeme A. Dunstan, C25 and C30 highly branched isoprenoid alkenes in laboratory cultures of two marine diatoms Organic Geochemistry. ,vol. 21, pp. 407- 414 ,(1994) , 10.1016/0146-6380(94)90202-X
R.W. Dunlop, P.R. Jefferies, Hydrocarbons of the hypersaline basins of Shark Bay, Western Australia Organic Geochemistry. ,vol. 8, pp. 313- 320 ,(1985) , 10.1016/0146-6380(85)90010-5
Patrick Gearing, Juanita Newman Gearing, Thomas F. Lytle, Julia Sever Lytle, Hydrocarbons in 60 northeast Gulf of Mexico shelf sediments: a preliminary survey Geochimica et Cosmochimica Acta. ,vol. 40, pp. 1005- 1017 ,(1976) , 10.1016/0016-7037(76)90043-0
John K. Warren, Sedimentology and Mineralogy of Dolomitic Coorong Lakes, South Australia Journal of Sedimentary Research. ,vol. 60, pp. 843- 858 ,(1990) , 10.1306/212F929B-2B24-11D7-8648000102C1865D
M. C. Thoms, W. D. Williams, The siliceous sediments of Lake Cantara South, a saline lake in South Australia International Journal of Salt Lake Research. ,vol. 2, pp. 29- 40 ,(1993) , 10.1007/BF02905050
Wen-Yen Huang, W.G. Meinschein, Sterols as ecological indicators Geochimica et Cosmochimica Acta. ,vol. 43, pp. 739- 745 ,(1979) , 10.1016/0016-7037(79)90257-6