论文部分内容阅读
北祁连山及走廊地区的泥盆系的时代及划分,对确定北祁连地槽和走廊过渡带的主旋回实为关键,也是普查含铜砂岩的对象之一,因此,对泥盆系新成果的报导,常为广大地质工作者关注。该区的泥盆系,原一般概念是指位于韦宪阶之下和下古生界之上的一套红色砂、砾岩层,曾以“老君山”命名,有称“砾岩”、有称“系”、也有称“组”或“群”,对其划分及时代归属和地层名称等问题,迄今意见不一。以往对泥盆系的研究报导,多限于某些地层剖面和局部地段,作为一个区域性的地层总结讨论尚不够系统和全面。笔者依据工作中所接触
The age and division of Devonian in the areas of the North Qilian Mountains and the corridor are crucial to determining the primary recovery of the transitional zone between the North Qilian Gully and the corridor. They are also one of the targets for the census of copper-bearing sandstone. Therefore, Reports, often for the majority of geological workers attention. The Devonian in this area, the original general concept refers to the red sand and conglomerate which is located under the Wei-Xian and above the Paleozoic. It was named as “Laojunshan” and called “conglomerate” Department “, also known as” group “or” group ", its division and the era of ownership and stratum name and other issues, so far divergent views. Previous studies on the Devonian are mostly limited to some stratigraphic sections and local sections. As a regional stratigraphic summary discussion, it is not yet systematic and comprehensive. The author is based on the work of contact