金鸿山地区侏罗系地层划分和构造控煤分析  

Analysis on the stratigraphic division and the coal-controlling by structure of Jurassic in Jinhongshan area

作　　者：向科俊 曹理 葛胜伟 李泽敏 XIANG Ke-jun;CAO Li;GE Sheng-wei;LI Ze-min(Shaanxi Tiandi Geology Co. ,Ltd. ,Xi’an 710054,China;Shaanxi 186 Coalfield Geology Co. ,Ltd. ,Xi’an 710065,China)

机构地区：[1]陕西天地地质有限责任公司,陕西西安710054 [2]陕西省一八六煤田地质有限公司,陕西西安710065

出　　处：《陕西煤炭》2020年第5期70-73,共4页Shaanxi Coal

摘　　要：金鸿山地处柴达木盆地西北缘,区内以往开展了数次煤炭勘查工作,基本都以地质路线调查为主,对地层、构造等基础地质特征研究不够深入,找煤效果欠佳。由于区内地层风化严重,难以找到化石作为支撑地层划分的直接依据,所以对该区侏罗系地层的划分上一直存在分歧。通过该区最近几年投入的一些地质工作,总结前人成果,通过岩石地层学、构造学等方法,对该区侏罗系地层划分、构造控煤规律进行综合分析,认为本区侏罗系地层由老到新划分为侏罗系中统大煤沟组(J2d)、侏罗系中统石门沟组(J2s)、侏罗系上统采石岭组(J3c),区内构造控煤条件为典型的老山埋藏型。Jinhongshan area is located in the northwest margin of Qaidam Basin.In the past,several coal exploration works focusing on geological route survey has been carried out in the area,but the research on the basic geological characteristics such as strata and structure is not deep enough,and the coal prospecting effect is not good.Because of the serious weathering of the strata in the area,it is difficult to find fossils as the direct basis for supporting stratigraphic division,so there are always differences in the division of Jurassic strata in this area.Based on the geological work of the area in recent years,combined with the previous geological results,the Jurassic stratigraphic division and the structural coal control law are comprehensively analyzed by using lithostratigraphy,tectonics and other methods.The results show that the Jurassic strata in this area can be divided into Middle Jurassic Dameigou formation(J2d),Middle Jurassic Shimengou formation(J2s)and Upper Jurassic Caishiling formation(J3c),and the structural coal control condition in the area is typical Laoshan buried type.

关 键 词：侏罗系 地层划分 构造控煤 老山埋藏 

分 类 号：TD11[矿业工程—矿山地质测量]