NEW IDEAS ON THE COAL-EXPLORATING DIR ECTION IN MULTI-PERIOD COAL-ACUMULATED BASINS

The traditional coal-explorating direction mostly took the modern retained basin-margin as the target is spite of the age of this coal-bearing strata. According to the recent research of the east margin of the Songliao Basin and Shuangyang region,Changchun,the authors think that in the new coal-explorating strategy,the residual coal basins,which are overlapped by the Quaternary and wrongly located in the old strata by the sporadic outcrops,should be found widely in the periphery of the basin; meanwhile,care must be taken to the coal-bearing strate pinched from the present basin margin to interior,because an another independent coal-bearing subbasin may be existed in the deeper part of basin.