贵州早,中三叠世台地—盆地相过渡区层序地层及沉积地球化学特征

在详细的露头层序地层学研究的基础上，建立了贵州早、中三叠世台地和盆地过渡区２个三级层序７个四级层序和层序地层格架。并分析了该地区早、中三叠世地层微量元素分布的规律，探讨了三叠纪层序地层与微量元素之间的关系。

EARLY MIDDLE TRIASSIC SEQUENCE STRATIGRAPHY AND SEDIMENTARY GEOCHEMISTRY AT THE FACIES TRANSITION REGION IN GUIZHOU, CHINA

Based on field investigation of exposed sequence stratigraphy and referred Triassic sea level changes in South China,sequences of two 3rd order and seven 4th order of Lower and Middle Triassic are established in this paper.In addition,the Triassic sequence stratigraphy framework of Guizhou is constructed,which is the first detailed sequence division of Triassic in Guizhou and is important to further paleogeography and facies studies. This paper also studies the geochemistry and distribution of trace elements in the Triassic strata.The relationship between trace elements and sequence stratigraphy is discussed.It is suggested that the enrichment of Pb,Ba,Mn,Si,Ga and Ni was caused by hydrothermal activities accompanied with intercontinental tensile subsidence in the passive continental margin.