摘要
本文就我国当前推广应用以岩石地层单位为主的1:5万区调地质组图测制工作涉及有关的几个问题进行探讨。首先,关于多重地层学的含义问题。文中介绍了当今世界上关于“统一地层学”和“多重地层学”的概念及其地质“系图”和“组图”各自的适用范围、存在问题,并强调指出测制“组图”的重要性和实用意义;其次,讨论了“组”的定义,指出岩相是划分“组”的理论基础,岩相界面是组或段的分界面;第三,关于测制地质组图时,提出如何开展岩石地层单位清理、岩相工作精度、岩组划分中一些具体问题,以及如何使用岩石地层单位符号、命名等问题的处理意见与看法。
This paper has discussed several problems concerning the surveying and drawing of geological formation map in 1 : 50,000 scale regional geological reconnaissance in which lithostratigraphic unit predominates, which is popularized and applied in our country. The first problem is concerned with the meaning of 'polystratigrahy'. This paper has introduced the concepts on 'unity stratigraphy' and 'polystratigraphy' in the world of today, as well as each scope of application and existed problems of geological ' system map' and 'formation map', and emphatically pointed out the importance and pratical sense on surveying and drawing 'formation map'. The second problem is concerned with the difinition of 'formation'this paper has pointed out that lithofacies is the theoretical base of division formation, and the interface of lithofacies is the one of formation or member. The third problem is concerned with surveying and drawing geological formation map. This paper has proposed some concrete problems which are how to develop the clearance of lithostratigraphic unit, the working accuracy of lithofacies and the stratigraphic formation division, and some concrete ideas and suggestions dealing with problems which are how to use the marks and names etc. of lithostratigraphic unit.
