永兴县邓家冲区段地质构造新认识与中深部煤炭资源的新发现及启示

New understanding of geological structure and new discovery of coal resources in the middle and deep part of Dengjiachong section of Yongxing County

永兴县邓家冲区段浅部1971年提交了地质勘探最终报告。报告认为,永耒向斜西翼沿地层走向分布一个由高角度正断层组成的大断层系(F_(1)),它将中深部(-300 m以下)的可采煤层断失,区内无找煤前景,因此,近三十年来一直无地勘单位在该区进行地质勘查。2010年,湖南省煤炭地质勘查院对该区构造进行了重新解释,确定F_(1)为一推覆构造且原地系统中赋存有可采煤层,据此设立了探矿权,取得了较好的找煤效果,因此,启发和促进了相邻区段煤炭勘查项目的实施,并预测了荆草坪区段是下一步煤炭勘查的靶区。

The final geological report of the shallow part of the Dengjiachong section in Yongxing County was submitted in 1971.According to the report,a large fault system(F_(1))composed of high angle normal faults is along the strike of the strata in the West Wing of Yonglei syncline,which breaks the minable coal seams in the middle and deep(-300m below),and there is no coal prospecting potential in the area.Therefore,no geological exploration was conducted in the area for decades.In 2010,the coal geological exploration institute of Hunan province reinterpreted the structure of the area,and determined F_(1) as a nappe structure where contained minable coal seams in the in-situ system.Based on this,the exploration right was established,and good coal prospecting effect was achieved.Therefore,the implementation of coal exploration projects in adjacent sections was inspired and promoted,and the Jingcaoping section was predicted as the next coal exploration target area.