首页|期刊导航|中国地球化学学报(英文版)|Tectonic Setting and Nature of the Provenance of Sedimentary Rocks in Lanping Mesozoic-Cenozoic Basin: Evidence from Geochemistry of Sandstones
中国地球化学学报(英文版)2003，Vol.22Issue(4)：352-360,9.
Tectonic Setting and Nature of the Provenance of Sedimentary Rocks in Lanping Mesozoic-Cenozoic Basin: Evidence from Geochemistry of Sandstones
Tectonic Setting and Nature of the Provenance of Sedimentary Rocks in Lanping Mesozoic-Cenozoic Basin: Evidence from Geochemistry of Sandstones
摘要
Abstract
The geochemical composition of sandstones in the sedimentary basin is controlled mainly by the tectonic setting of the provenance,and it is therefore possible to reveal the tectonic setting of the provenance and the nature of source rocks in terms of the geochemical composition of sandstones. The major elements,rare-earth elements and trace elements of the MesozoicCenozoic sandstones in the Lanping Basin are studied in this paper,revealing that the tectonic settings of the provenance for Mesozoic-Cenozoic sedimentary rocks in the Lanping Basin belong to a passive continental margin and a continental island arc. Combined with the data on sedimentary facies and palaeogeography,it is referred that the eastern part of the basin is located mainly at the tectonic setting of the passive continental margin before Mesozoic,whereas the western part may be represented by a continental island arc. This is compatible with the regional geology data. The protoliths of sedimentary rocks should be derived from the upper continental crust,and are composed mainly of felsic rocks,mixed with some andesitic rocks and old sediment components. Therefore,the Lanping Mesozoic-Cenozoic Basin is a typical continental-type basin. This provides strong geochemical evidence for the evolution of the paleo-Tethys and the basin-range transition.关键词
geochemistry of sandstone/tectonic setting of provenance/nature of source rock/Lanping Mesozoic-Cenozoic BasinKey words
geochemistry of sandstone/tectonic setting of provenance/nature of source rock/Lanping Mesozoic-Cenozoic Basin分类
天文与地球科学引用本文复制引用
李志明,刘家军,胡瑞忠,何明勤,刘玉平,李朝阳..Tectonic Setting and Nature of the Provenance of Sedimentary Rocks in Lanping Mesozoic-Cenozoic Basin: Evidence from Geochemistry of Sandstones[J].中国地球化学学报(英文版),2003,22(4):352-360,9.基金项目
This research project was financially supported by the funds for Project 973 under the Major Basic Research Program of the People's Republic of China (Grant No. G1999043208). （Grant No. G1999043208）
