北祁连山西段石炭二叠系界线初析兼论对大黄沟群的再研究

PRELIMINARY ANALYSIS ON CARBONIFEROUS-PERMIAN BOUNDARY ALONG NORTHERN SLOPE OF WESTERN PART OF QILIAN MOUNTAINS AND RESTUDIES ON DAHUANGGOU GROUP

在大量野外工作和充分讨论国内外石炭——二叠系界线划分意见的基础上,本文初步分析了北祁连山西段石炭——二叠系界线,讨论了该区大黄沟群、大黄沟组和山西组的关系及时代,指明早二叠世早期地层在北祁连山西段确实存在,没有缺失。

On the basis of much field work and full discussion on opinions of Carboniferous-Permian boundary at home and abroad, this paper preliminarily analyses the Carboniferous - Permian boundary along the northern slope of the western part of Qilian Mountains. The relationship among Dahuanggou group, Dahuanggou Formation and Shanxi Formation in the area and the geologic age are also discussed. The final conclusion is that the early strata of early Permian in the area really exist without loss.