Organic Geochemical Characteristics and Paleo-Environments of Doushantuo Formation from Yangtze Platform,South China
作者单位：中国石油大学(北京)
学位级别：硕士
导师姓名：Wang Guang Li
授予年度：2019年
学科分类：070902[理学-地球化学] 081803[工学-地质工程] 0709[理学-地质学] 07[理学] 08[工学] 0818[工学-地质资源与地质工程]
摘 要：Phosphorite organic-rich sediments from Weng’an Doushantuo Formation preserves earliest animals and multicellular life,though it has been investigated by many researchers but in terms of biomarker analysis still need to be *** we have applied various specific aliphatic and aromatic biomarkers（Molecular fossils）parameters with stable carbon isotope *** biomarker investigation of sixteen phosphoritic rocks from Weng’an Doushantuo Formation,Guizhou,South China,was carried out to identify the paleo-depositional environment,source of its organic matter and thermal maturity by using gas chromatography-mass spectrometry/mass spectrometry（GC-MS/MS）.Particular care was taken while doing geochemical analysis in order to get rid of possible *** results indicates the source rock extracts from Weng’an Doushantuo Formation have similarity in molecular *** the studied samples have a lower amount of TOC,ranging from 0.07%to 0.58%.Molecular fossils revealed that the source input of organic matter was mainly derived from eukaryotic algae,including dinoflagellates（or their ancestors）,demosponges as confirmed by the presence of dinosteranes,C
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