摘要
生物的生产量以及被保存的沉积有机质是烃源岩形成的重要条件。多细胞生物出现并广泛地生活于扬子地区伊迪卡拉纪陡山沱期晚期的浅海中,生物之间相互依赖和共存的多层次化和复杂化生态系统的建立,使陡山沱期成为扬子地区生命演化和发展重要时期。陡山沱期的黑色泥(页)岩在沉积时为富含水份的粥性沉积物,同时当时海洋中的氧化-还原界面较浅,生物遗体可迅速地被沉积物所覆盖而形成烃源岩。伊迪卡拉纪陡山沱期是化学、气候和环境变化的剧烈时期,也是扬子地区生命演化、有机质生产力发展和烃源岩形成的一个重要时期。
The productivity of organisms and abundances of preserved organic matter are believed to be important conditions for the formation of source rocks. The muhicellular organisms appeared in substantial amounts in the Yangtze shallow sea during the Doushantuoan （Ediacaran）. The black mudstones （shales） were once deposited as the water-rich gruel sediments during the Doushantuoan. At that time, the oxidation-reduction interfaces were relatively shallower. The organic remains could be rapidly covered by the gruel sediments so as to form the source rocks. The Doushantuoan （Ediacaran） went through sharp changes in chemical, climatic and environmental aspects, and thus may be a key period for the life evolution, development of organic productivity and formation of the source rocks in the Yangtze area.
出处
《沉积与特提斯地质》
CAS
CSCD
2010年第3期30-38,共9页
Sedimentary Geology and Tethyan Geology
基金
国家自然科学(No.40739901)
贵州省省长基金
贵州省科技基金(J-2010-2030)联合资助
关键词
烃源岩
有机质
氧
多细胞生物
陡山沱期
扬子板块
source rock
organic matter
oxygen
multicellular organism
Doushantuoan
Yangtze plate
