松辽盆地外围油气新区中生代地层研究新进展

New research progress of the Mesozoic strata in new areas on the periphery of Songliao Basin

通过对松辽盆地外围西部中生代重点盆地的调查分析,重新划分了龙江盆地的中生代地层,特别是重新解释了甘河组的含义;解体了突泉盆地的付家洼子组,将其分别划归为付家洼子组、满克头鄂博组、玛尼吐组;重新划分了扎鲁特盆地的火山岩地层,根据同位素年龄测试结果,将一部分划归古生界大石寨组的火山岩地质体分别划归中生界塔木兰沟组、玛尼吐组;建立了松辽盆地外围西部中生代重点盆地,包括龙江盆地、突泉盆地、扎鲁特盆地和乌兰盖盆地中生代地层的对比关系。

By investigating the main Mesozoic basins on the western periphery of the Songliao Basin,the authors redivided the Mesozoic strata in Longjiang basin and reinterpreted the meaning of Ganhe Formation.In Tuquan basin,Fujiawazi Formation is disintegrated into Fujiawazi Formation,Manketouebo Formation and Manitu Formation.The Mesozoic strata in Zhalute basin are redivided and,especially,a part of Paleozoic Dashizhai Formation is assigned to Tamulangou Formation and Manitu Formation according to isotopic dating results.The lithostratigraphy,biostratigraphy and and chronolithologic units in the main Mesozoic basins on the periphery of Songliao Basin were studied,which included Longjiang basin,Tuquan basin,Zhalute basin and Wulangai basin.The regional stratigraphic column and stratigraphic framework of the main basins were established for potential oil and gas prospective areas.