Major and trace elemental compositions of the upper Carboniferous Batamayineishan mudrocks, Wulungu area, Junggar Basin, China: Implications for controls on the formation of the organic-rich source rocks

作者：Zhang, Kuihua; Jin, Wujun; Lin, Huixi^*; Dong, Caiyuan; Wu, Shangrong

来源：Marine and Petroleum Geology, 2018, 91: 550-561.

DOI：10.1016/j.marpetgeo.2018.01.003

• Paleoproductivity
• Redox conditions
• Paleoweathering
• Trace element
• Major oxides
• Junggar basin

The upper Carboniferous Batamayineishan mudstones are an important and effective gas source rock in the Wulungu area. These sediments are rich in organic matter, however, organic matter accumulation has not been studied before in these mudstones. The major and trace elements were used to reconstruct the depositional environments of these sediments and to improve our understanding of the factors controlling organic matter accumulation. Major and trace elements data indicate that: (1) paleoweathering was low to intermediate in the source terrain; (2) paleoclimate was hot and arid during late Carboniferous in the Wulungu area; (3) low paleoproductivity may have been induced by the low input of nutrients caused by the hot arid climate; (4) the Batamayineishan mudstones were deposited under a reducing environment; (5) organic matter accumulation in these studied deposits was mainly controlled by the input of higher plants rather than redox conditions and paleoproductivity.

• 出版日期2018-3
• 单位中国石油化工股份有限公司石油勘探开发研究院; 中国石油天然气股份有限公司勘探开发研究院; 中国农业科学院农业资源与农业区划研究所