青海省木里煤田构造控煤特征及找煤方向

Characteristics of structural coal control and coal searching direction in Muli Coalfield,Qinghai Province

木里煤田是青海省重要的煤产地,其中聚乎更、哆嗦公马、雪霍立、外力哈达、热水等地含煤地层出露较好、煤系埋深较浅。受祁连山构造带以及阿尔金断裂走滑作用的控制,木里煤田构造类型多样。根据木里煤田的地质背景,从沉积聚煤规律、构造特征及其控煤作用等方面对木里煤田隐伏区及逆冲推覆构造下含煤地层进行分析,指出应在已知矿区外围逆冲推覆断层下盘找煤,同时被新生代覆盖的隐伏区为今后找煤的方向。

Muli Coalfield is an important coal producing area in Qinghai Province,among which Juhugeng,Duosuogongma,Xuehuoli,Wailihada,Reshui and other places have better coal bearing strata exposure and shallow coal measures burial depth.Controlled by Qilian Mountain structural belt and Altun fault strike slip,Muli Coalfield has various structural types.According to the geological background of Muli Coalfield,the coal bearing strata in the hidden area and under thrust nappe structure of Muli Coalfield are analyzed from the aspects of sedimentary coal accumulation law,structural characteristics and coal control.It is pointed out that the coal exploration should be carried out in the footwall of the thrust nappe fault around the known mining area,and the hidden area covered by the Cenozoic is the direction of coal exploration in the future.