STRUCTURAL LITHOLOGICAL LITHOFACIES MAPPING METHOD—A New Method for 1∶50,000 Geological Mapping of the Terrestrial Red Basin
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摘要: 通过吉安—泰和盆地１∶５万区域地质调查实践，提出了构造—岩性—岩相填图法：首先在区域性资料分析的基础上，通过踏勘确立构造不整合面、相变换面，初步划分岩石地层单位的群、组；第二，测制剖面，详细研究构造不整合面、相变换面、同相叠复面等界面特征及被这些界面围限的岩石地层内部结构等，正式划分岩石地层群、组、段，建立岩石地层层序；第三，利用主干地质路线调查，建立盆地地层格架；第四，开展面上地质调查，完成１∶５万地质填图；最后，进行综合分析，选择重点区段、剖面进行详细研究，总结盆地沉积模式Abstract: Through the 1∶50,000 regional geological survey of the Ji’an Taihe basin,the authors put forward the structural lithological lithofacies mapping method.First,determine structural unconformities and facies change surfaces and preliminarily establish the lithostratigraphic units group and formation on the basis of an analysis of regional data and subsequent reconnaissance.Second,construct the section and intensively study all kinds of lithostratigraphic surface and the internal structures of the rocks and strata bounded by these surfaces in order to establish the groups,formations and members as well as the lithostratigraphic sequences.Third,carry out surveys along main geological lines in order to establish the stratigraphic framework of the basin.Fourth,carry out geological surveys to complete 1∶50,000 geological mapping.Finally,make an integrated analysis and select important areas and sections to conduct a detailed study and establish a depositional model of the whole basin.
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