陆相湖盆层序地层格架内有机质发育及控制因素分析——以中上扬子建南地区侏罗系东岳庙段为例

发布时间：2018-05-31 14:32

本文选题：有机质发育控制因素 + 层序地层格架　；参考：《天然气地球科学》2017年06期

【摘要】：在层序地层学和沉积学研究的基础上,通过相关性分析,优选出Sr/V、Cd/Ca、Zr/Rb 3组元素地球化学指标,分别对中上扬子建南地区侏罗系自流井组东岳庙段的古气候条件、古生产力、以及古水动力条件开展分析,探讨研究区目的层有机质在层序地层格架内发育的成因机制。研究表明:与其他湖盆沉积的有机质发育特征相比,中上扬子建南地区侏罗系东岳庙段的湖相沉积在层序地层格架内有机质发育规律具有独特性,其低位体系域有机质非常发育,而湖扩体系域有机质较发育,高位体系域有机质最不发育,在沉积微相中,低位体系域浅湖亚相沉积有机质比低位体系域滨湖亚相沉积中的有机质更发育;而造成有机质差异性发育的主要控制因素是古生产力和有机质的保存环境。
[Abstract]:Based on the study of sequence stratigraphy and sedimentology, based on the correlation analysis, three sets of elemental geochemical indexes, Sr / V, CD / CD / Ca, Zr / RB, are selected, respectively, for the paleoclimate conditions and paleoproductivity of the Dongyemiao member of the Jurassic Artesian well formation in the Jiannan area of the Middle and Upper Yangtze. Based on the analysis of paleohydrodynamic conditions, the mechanism of organic matter development in sequence stratigraphic framework in the study area is discussed. The results show that compared with other lacustrine sediments, the lacustrine facies of the Jurassic Dongyemiao section in the middle and upper Yangzi Jiannan area is unique in the development of organic matter in the sequence stratigraphic framework. The organic matter in the lowstand system tract is very developed, while the organic matter in the lacustrine extension system tract is relatively developed, and the organic matter in the upper system tract is the least developed, in the sedimentary microfacies, The organic matter of shallow lacustrine subfacies in low system tract is more developed than that in littoral subfacies of low system tract, and the main controlling factors of organic matter difference development are paleoproductivity and preservation environment of organic matter.
【作者单位】：中国地质大学(武汉)构造与油气资源教育部重点实验室;
【分类号】：P618.13

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