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徐淮地区处在华北地台南缘,分布有徐州、淮北、淮南三大煤矿,周围绕以中、新生代叠合盆地。该区有煤成气生成、聚集和保存条件,是我们在找气工作中应予重视的对象。一、基岩结构和区域地质背景据朱英研究,华北地台的结晶基底由多个古陆核拼接而成。其中的“河淮陆核”以同位素年龄18—25亿年之泰山杂岩为核心,北起天津、南经本区东半部而止于蚌埠,沿北北东向展布,呈长卵
Xuhuai area is located in the southern edge of North China platform, distributed in Xuzhou, Huaibei, Huainan three coal mines around the Central Plains, Cenozoic superimposed basin. There are coal-based gas generation, accumulation and preservation of the area, we are looking for work in the gas should be the object of attention. First, bedrock structure and regional geological background According to Zhu Ying’s research, the crystalline basement of the North China platform is made up of multiple ancient continental cores. Among them, the “He-Huai-Lu nuclear” takes the Taishan complex with an isotopic age of 1.8-2.0 billion years as the core, starts from Tianjin in the north and ends in Bengbu in the east half of the area and spreads along the north-north-east direction