摘要
本文应用统计分析方法,从化学地层角度探讨苏皖北部上元古界的地质特征、各地层单元及地质界线附近地球化学信息的变化,以及元素在时间域中演化的波浪式特征。同时提出在原青白口及震旦化学阶段内部划分出三个次级的化学亚阶段。
'Chemostratigraphy' is a borderling discipline between geochemistry and stratigraphy, It is in the end of 1970's that chemostratigraphy was proposed as a special term by Chinese geologists. It mainly studies various kinds of properties of elements in the strata and their evolutional laws in terms of time and space.
Focusing on the statistical analysis of the chemostratigraphy of the late proterozoic sedimentary strata in northern Jiangsu and Anhui Provinces, the paper tries to eurich and deepen the knowledge about the upper Proterozoic in the study region, and provide some useful data for the further study in the future.
According to th characteristics of geochemical evolution of the upper Proterozoic in this region, the author suggests that three new chemo-substages and three corresponding chemo-subsuites——Huainan chemo-substage (chemo-subsuite), Xuhuai chemo-substage (chemo-subsuite), and Suxian chemo-substage (chemosubsuite) should be set up in the Qingbaikou chemo-stage and Siuian chemostage.
出处
《地质论评》
CAS
CSCD
北大核心
1990年第2期118-124,共7页
Geological Review
