永定县石坑岽矿区的构造特征分析

Structural Feature Analysis in the Shikengdong Mine Area,Yongding County

石坑岽矿区位于龙永煤田南部、抚市向斜的西翼,总体构造形态为一轴向近东西的背斜,受构造影响,背斜形态受到破坏严重。隔溪井田位于石坑岽矿区的东北,已查明的构造形态由多个钻孔控制,井田内的F11断层为逆断层,资料证实该断层延伸至石坑岽矿区,但在石坑岽矿区被确定为正断层(F5),为此利用隔溪井田中的10、17、23号钻孔资料及石坑岽矿区已有研究成果,对矿区内多条断层进行了重新解释,认定石坑岽矿区F5即为隔溪井田的F11逆断层。重新厘定的矿区构造形态,为石坑岽矿区转入详查勘探具有理论指导作用。

The Shikengdong mine area is situated in the southern part of the Longyong coalfield and west limb of Fushi syncline. General structural form is an anticline with axial trend near EW, and seriously destructed by tectonic actions. The Gexi minefield is located to the northeast of Shikengdong mine area, all identified structures are controlled by multiple boreholes, the F11 fault is a reverse fault, evidence is tendered that the fault has extended into Shikengdong mine area, but is deemed to a normal fault （FS）, thus to use data of boreholes Nos.10, 17 and 23, and existing research results in Shikengdong mine area, reinterpreted multiple faults in the mine area, determined that the F5 no other than the F11 reverse fault. Amended mine area structural forms have guiding importance theoretically when the Shikengdong mine area is ready to shift into preliminary exploration stage.