Organic Geochemistry of Rock Series Bearing Phosphor in Early Cambrian in Weng’ An, Guizhou Province

• 责任者：Lin Li (Institute of Sedimentary Geology ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Zhou Yuhua
• 刊名：Journal of Mineralogy and Petrology
• 出版年：2010
• 卷期：30(1)
• 关键词：磷块岩矿床 ; phosphorite deposit ; 贵州 ; Guizhou Province
• 页码：p.93-98
• 图表：5 illus., 1 table, 36 refs.
• 分类号：1002
• issnNo：ISSN1001-6872
• isbnNo：CN51-1143/TD

By means of GC-MS, a lot of biomarkers of n-alkanes, isoprenoid, teranes and terpanes were detected from phosphorite occurred in the bottom of the l Niutitang Formation of Early Cambrian, in the Weng’ an area of Guizhou Province. The n-alkanes of phosphorite showed carbon molecular components with highest peaks of nC₁₇ and nC₂₇, without odd-even carbon dominance. The ratio of pristine/phytane of 0.95 indicated that the sample possessed phytane dominance. Terpanes distribution patterns of samples were pentayclic terpanes>tricyclic terpanes>tetracyclic terpanes.Regular steranes consist mainly of C₂₇-steranes, C₂₈-steranes and C₂₉-steranes and its pattern showed asymmetric "V" distribution. According to abundance, C₂₉-steranes>C₂₇-steranes>C₂₈-steranes were identified.