地质找矿论丛2017，Vol.32Issue(1)：8-14,7.DOI:10.6053/j.issn.1001-1412.2017.01.002
瓮安震旦系磷块岩中的生物成矿作用
The Sinian biomineralization of phosphorites in Weng'an area, Guizhou
摘要
Abstract
Biological accumulation of phosphorus was an important factor for formation of phosphorite.The large marine phosphorite deposits are closely related to the biomineralization.In the central Guizhou province occur thick Sinain phosphorite layers which may deposited by stimulation of recovery and flourishing of the Sinian biota.Organic material is extracted from the Sinain P-rich strata in Weng'an area and analyzed it to molecular scale with biomark technique.Result shows that the hydrocarbons fractions contained n-alkanes,terpanes,steranes and so on implying that the sources of the organic matters in phosphorite came from algaes and bacteria.δ(13C) value variation curve of n-alkanes indicates that species of medium-low organism in the post Nantuo glacial epoch ocean is unitary.关键词
白云质磷块岩/陡山沱组/有机地球化学/生物成矿作用/贵州省Key words
Doushantuo Formation/dolomitic phosphorite/organic geochemistry/bio-metallogeny Weng'an in Guizhou分类
天文与地球科学引用本文复制引用
密文天..瓮安震旦系磷块岩中的生物成矿作用[J].地质找矿论丛,2017,32(1):8-14,7.基金项目
兰州大学甘肃省西部矿产资源重点实验室开放课题(编号:WCRMGS-2014-06)、内蒙古自治区高等学校科学研究项目(编号:NJZY14067)资助. （编号:WCRMGS-2014-06）
