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引用本文:李建仁,王苏民.中国东部若干封闭含油气盆地泥质岩地球化学的研究.湖泊科学,1990,2(1):30-36. DOI:10.18307/1990.0105
Li Jianren,Wang Sumin.Geochemical characteristics of mudstones in several oil and gas-bearing closed basins, east China. J. Lake Sci.1990,2(1):30-36. DOI:10.18307/1990.0105
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中国东部若干封闭含油气盆地泥质岩地球化学的研究
李建仁, 王苏民
中国科学院南京地理与湖泊研究所
摘要:
中国东部沿北东、北北东向断裂发育了一系列早第三纪含油气断陷盆地。受干旱气候的影响,这些盆地常为封闭或半封闭的咸水湖泊环境。本文通过对其中若干盆地泥质岩的化学分析,确认泥质岩主要由粘土矿物组成,并含少量碳酸盐。将盆地的沉积环境,尤其是盐度与一些地球化学参数关系作了探讨后认为,低盐度时Sr/Ba、Ca、Mg总量、Ca/Mg、V/Ni和Mn/Fe能反映湖泊在时空上的盐度变化。高盐度时,Sr/Ba、CaCO3、B与盐度正相关已不复成立,并对其原因作了讨论。
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DOI:10.18307/1990.0105
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Geochemical characteristics of mudstones in several oil and gas-bearing closed basins, east China
Li Jianren, Wang Sumin
Nanjing Institute of Geography and Limnology, Academia Sinica
Abstract:
A number of oil and gas-bearing closed rift basins were formed at Early Tertiary along the great faults, stretching in a NE or NNE direction in East China.These basins were often evolved into closed or semi-closed saline lakes as a result of arid climate.The chemical content of mudstones in some of there basins indicates that mudstones are composed of clay minerals and a small amount of carbonates. The relationship between the sedimentary environments, especially salinity and some geochemical indexes, is studied and it is believed that Sr/Ba, total Ca/Mg, Ca/Mg, V/Ni and Mn/Fe can reveal the temporal and spatial changes in salinity of the lakes at the stage of low salinity.However, there exists no positive correlation among Sr/Ba, CaCO3, B and salinity at supersaturated stage.
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