论同沉积、继承性控煤构造--禹州煤田虎头山断层

聚煤盆地内的同沉积断层,对煤系的厚度、岩相、含煤性等均具有明显的控制作用,而这种断层的聚煤期后继承活动,不仅使之成为地质自然边界,而且直接影响到矿区规划和煤炭生产。近期研究表明,禹州煤田虎头山断层是一个同沉积、继承性大型控煤构造,它在聚煤期就已活动,具聚煤期同沉积构造性质,主要证据有岩性、沉积厚度、聚煤作用、地层断距、断裂带近旁的不协调沉积现象以及趋势面分析结果等;聚煤期后该断层又发生了继承性活动,主要表现在基岩错断、地层缺失、对地貌及新生界沉积的控制和改造、断层旁侧次级构造发育、煤层露头遭受牵引、断裂破碎带特征等。虎头山断层这一重要特征的发现,对指导煤矿建井开采、深入探讨禹州煤田煤厚变化、地质构造乃至华北板块的构造演化,均具有重要的理论意义和实际价值。

Discussion on Syndepositional & Inherited Coal-controlling Structure--Hutoushan Fault in Yuzhou Coalfield

Thesynsedimentary fault in coal accumulating basin had a clear controlling role in the thickness, lithofacies and coal bearing nature of coal bearing series, and not only became a geological natural boundary but also had a direct effect on design of mining area and coal production because of its inheritable mobility after coal forming period.More recently,it is discovered that Hutoushan fault in Yuzhou coalfield is a large syndepositional inherited coal controlling structure. It was active during coal forming period. Based on the lithology,sedimentary thickness,coal accumulation,stratigraphic throw, disharmonic sedimentation at side of fault zone and result of trend surface analysis, it was proven to be a syndepositional fault in coal forming period. And after coal forming period posthumous movement took place again, with the evidences of bedrock dislocation and stratigraphic lacuna, control and reformation of landform and Cenozoicsedimentation, development of second order structures and traction of cool outcropping and features of fracture crushed zone,and so on. This discovery is very important and valuable both in theory and in practice, which gives guide lines for construction of mine,production,studying coalbed thickness,tectonics of Yuzhou coalfield and tectonicevolution of the north China plate.