地质学报（英文版）2002，Vol.76Issue(4)：455-462,8.
Geochemical Constraints of Sediments on the Provenance, Depositional Environment and Tectonic Setting of the Songliao Prototype Basin
Geochemical Constraints of Sediments on the Provenance, Depositional Environment and Tectonic Setting of the Songliao Prototype Basin
摘要
Abstract
The geochemistry of sediments is primarily controlled by their provenances, and different tectonic settingshave distinctive provenance characteristics and sedimentary processes. So, it is possible to discriminate provenances,depositional environments and tectonic settings in the development of a sedimentary basin with the geochemistry of theclastic rocks. The analytical results of the present paper demonstrate that sediments in the Songliao prototype basin areenriched in silica (SiO2=66.48-80.51%), and their ΣREE are 30-130 times of that of chondrite with remarkable Euanomalies. In discriminating diagrams of Eu/Eu* vs ΣREE and (La/Yb)N vs ΣREE, most samples locate above the line Eu/Eu*=1, on the right of the line Eu/Eu*/ΣREE=1 and under the line La/Yb)N/ΣREE=1/8, which indicates that thedepositional environment of sediments in the basin was oxidizing. In addition, variations of MgO, TiO2, A12O3,FeO+Fe2O3, Na2O and CaO vs SiO2 reflect a tendency of increasing mineral maturity of sediments in the basin. Analysesalso show that the protolytes of the sediments in the basin were felsic igneous rocks, and the Songliao prototype basin wasin a tectonic setting of an island arc on an active continental margin, with violent sinistral strike-slip.关键词
Songliao prototype basin/geochemistry of sediment/provenance/depositional environment/tectonic settingKey words
Songliao prototype basin/geochemistry of sediment/provenance/depositional environment/tectonic setting分类
天文与地球科学引用本文复制引用
阎全人,高山林,王宗起,李继亮,肖文交,侯泉林,阎臻,陈海泓..Geochemical Constraints of Sediments on the Provenance, Depositional Environment and Tectonic Setting of the Songliao Prototype Basin[J].地质学报（英文版）,2002,76(4):455-462,8.基金项目
This research was supported by grants from the China National Petroleum Corporation (CNPC: 970206-02-13). （CNPC: 970206-02-13）
