大兴安岭地区突泉盆地侏罗系充填序列及暗色泥岩发育特征

突泉盆地的侏罗系火山-沉积地层充填序列划分为3个级别的火山-沉积旋回，包括2个一级旋回，5个二级旋回.主要发育于红旗组的暗色泥岩具有一定的生烃潜力，综合评价为中等-好烃源岩，万宝组暗色泥岩生烃潜力较差.上古生界二叠系暗色泥岩具有较大的生烃潜力，是今后进一步加强油气基础调查的工作方向.

THE DEVELOPMENT OF MELAMUDSTONE AND THE JURASSIC FILLING SEQUENCE IN TUQUAN BASIN, DAXINGANLING REGION

According to the evolvement features,the filling sequence of the Jurassic volcanic-sedimentary strata in the Tuquan Basin,Daxinganling region can be assigned to three grades of volcanic-sedimentary cycles,including 2 cycles of Grade I,5 cycles of Grade II and several cycles of Grade III.The organic geochemical characteristics show that the melamudstone in Jurassic Hongqi formation is medium to good grade of source rock for hydrocarbon,while that in the Wanbao formation is relatively poor.The high maturity of the Permian melamudstone is favorable to the formation of Permian hydrocarbon source rocks,indicating that the Paleozoic strata should be the focal point for the future investigation.