Heavy minerals assemblage analysis and its structural indication in Late Mesozoic basin of Luxi uplift
Bu Xiangping1, Shi Yonghong2, Li Zhong3
1. Anhui institute of Geophysical and Geochemical Exploration,Hefei 230022;
2. College of Resources & Environmental Engineering,Hefei University of Technology,Hefei 230009;
3. State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences, Beijing 100029
This paper Luxi uplift in the basin and the surrounding sandstone detrital heavy minerals are studied through the stability of heavy minerals,as well as by different source areas between the heavy mineral assemblages are discussed later in Luxi uplift and the surrounding areas since the Mesozoic tectonic evolution and provenance.The results showed that the Early Mesozoic Luxi Early Jurassic period in the main source for the Luxi uplift,in the Late Jurassic period the main source for the Jiaodong and Luxi uplift,while the Mesozoic during the Early Cretaceous main source for the Jiaodong,followed by the Luxi uplift.Late Cretaceous fault basin source Yishu main Luxi uplift and Jiaodong,Luxi uplift contribution is greater than Jiaodong.Stability of heavy minerals also reflects the tectonic evolution history of the source.Early Middle Jurassic to the Late Jurassic,western Shandong Basin heavy mineral material source is to the eastern Shandong Luxi uplift significant change,suggesting the formation of the Sulu orogenic belt from the Triassic period,after he returned to the Late Jurassic uplift before the world had reached the surface.The content of heavy minerals shows that Early Cretaceous and Late Cretaceous sedimentary basins of the mid-western Shandong Luxi metamorphic mineral assemblage of large and unstable heavy mineral content increased dramatically,and we speculated that the late Early Cretaceous in western Shandong,Late Cretaceous mid-existence of two tectonic uplift.