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中祁连山区震旦系及青白口系是否存在,是大家共同关心的一个问题。1978年,我们对中祁连山西段大雪山地区的晚前寒武纪地层进行了综合性调查研究,基本肯定了震旦系、青白口系的存在,初步建立了该区地层系统,现将所获资料整理成文,供参考。一、剖面描述大雪山地区按西北区区域地层表甘肃省分册,隶属于祁连地层区中祁连山分区疏勒山小区。该区震旦系、青白口系为浅变质的类地槽型沉积或过渡型沉积。现将剖面分别描述于后。
The existence of the Sinian and Qingbaikou in the Qilian Mountains is a matter of common concern. In 1978, we conducted a comprehensive investigation on the Late Precambrian stratigraphy in the Da Xueshan area in the western segment of the Qilian Mountains, basically confirming the existence of the Sinian and Qingbaikou systems, and initially established the stratigraphic system in this area. Get information collated, for reference. First, the profile description Da Xueshan area according to the Northwest regional strata table Gansu Province sub-volumes, belonging to the Qilian stratigraphic area in the Qilian Mountains partition Shule mountain district. The Sinian and Qingbaikou of this area are shallow metamorphic terrane-type deposits or transitional deposits. The sections are now described separately.