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延边地区二叠系 70余年来的研究历史 ,是一部争论—前进—再争论—再前进的地层研究史。迄今虽然尚未取得共识 ,但运用“现代地层”和“大陆边缘”理论观点 ,分析已经取得的丰富的实际资料 ,表明现在在空间上紧接相邻的某些岩石地层 ,在二叠纪时是分属龙岗 (和龙 )地块北部陆缘活动带、兴凯地块西部陆缘活动带、佳木斯地块南部陆缘活动带不同空间的沉积产物。按照岩石地层单位的定义 ,应首先划分不同陆缘的岩石地层序列 ,而后通过分隔陆缘的相对的深水盆地相的岩石地层序列为桥梁去认识各陆缘带间岩石地层序列的相互侧向关系。但在造山带中 ,相对的深水盆地相的岩石地层 ,常因消减作用难见其踪迹 ,此时 ,仅能通过年代地层的对比判断各陆缘带岩石地层序列可能存在的侧向关系。为此 ,本文在拟建各陆缘带岩石地层序列的基础上 ,探讨了其年代地层关系 ,期求为解决本区二叠纪岩石地层划分的长期争议 ,提供一个新的统一划分方案 ,供研讨和实践检验之。
The research history of the Permian in Yanbian area for more than 70 years is a debate - advance - again argue - the history of stratigraphic research. Although no consensus has so far been reached, the analysis of the wealth of actual data that has been made using the concepts of “modern strata” and “marginal continental margins” shows that some of the rock formations now spatially adjacent to each other were They belong to the northern continental belt of Longgang (Heilongjiang), the western continental belt of Xingkai, the sedimentary product of different space in the southern continental belt of Jiamusi. According to the definition of lithostratigraphic units, the lithostratigraphic sequences of different continental margins should be divided first, and then the mutual lateral relationship between lithostratigraphic sequences of various continental margins should be recognized by using the lithostratigraphic sequences of opposite deep-water basin facies as the bridge . However, in the orogenic belt, the rock formations in the opposite deep-water basin facies are usually not seen by the depletion effect. At this time, the possible lateral relationship between the lithostratigraphic sequences in each continental margin can only be judged by comparing the age strata. Therefore, based on the proposed sequence of lithostratigraphic sequences in each continental belt, this paper discusses the age-stratigraphic relationships and provides a new unified scheme for the resolution of Permian lithostratigraphic division in this area for Research and practice test.