塔河地区断裂对奥陶系古岩溶的控制作用

Controlling Effects of Fault over Ordovician Palaeokarst in Tahe Region

塔河地区奥陶系发育加里东中期、加里东晚期—海西早期和海西晚期的逆断裂,断裂走向总体为NW向、NE向、EW向和SN向为主。断裂对奥陶系古岩溶地貌的形成和发育具有明显的控制作用,岩溶残丘、沟谷和古水系常沿NW向、NE向和SN向断裂发育。断裂带附近古岩溶储层尤为发育,缝洞型储层发育优势方向展布受控于断裂展布方向。

Many reverse faults develop in Ordovician palaeokarst in Tahe region, which include mainly NW, and NE,and EW, and SN directional.The formation and the development of palaeokarst landform is controled by the faults, palaeokarst hammock,and palaeokarst ravine, and ancestral river extend along fualts in NW and NE and SN direction.These faults control the development and the distribution of palaeokarst reservior, the best trend of fracture cavity system is dominated by the faults.