Geochemistry of the Middle Oligocene-Pliocene sandstones from the Nanpu Sag, the Bohai Bay Basin (Eastern China): Implications for provenance, weathering, and tectonic setting
Major, trace and rare earth elements of 37 sandstones of the Middle Oligocene-Pliocene from the Nanpu Sag, Bohai Bay Basin were analyzed to evaluate their provenance, weathering, tectonic setting.Low-intermediate values of the Chemical Index of Alteration (CIA) reveal that these sandstones experienced relatively weak chemical weathering. Trace element ratios and REE characteristics show that the source rocks mainly consisted of felsic magmatic rocks that formed in the Yanshan Fold Belt during Mesozoic Yanshanian period. Tectonic setting discrimination diagrams show that the sandstones were deposited in a reactivated innercontinental setting, supporting the origin of the Bohai Bay Basin as being related to subduction of the Pacific plate towards the Eurasian plate.
S.Liu
Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry and South China Sea Institute of Oceanology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences,Guangzhou, China;Gaduate School, Chinese Academy of Sciences, Beijing
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
513-517
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）