论文部分内容阅读
为扩大勘探领域 ,运用古生物资料对大庆外围盆地的古气候进行了研究。外围盆地侏罗纪—早白垩世早期发育的地层有早侏罗世海拉尔盆地的东宫组 ,中侏罗世三江盆地的绥滨断陷的绥滨组 ,晚侏罗世三江盆地的东荣组、虎林盆地的裴德组、七虎林组 ,早白垩世早期鸡西盆地、三江盆地的滴道组、城子河组、穆棱组、虎林盆地的下云山组、上云山组 ,在这些组中除晚侏罗世东荣组、裴德组、七虎林组外 ,其它各组都产有比较丰富的孢粉化石。未发现孢粉化石的层位 ,依据植物化石 ,得出早侏罗世东宫组为潮湿的暖温带气候 ,中侏罗世绥滨组为潮湿的北亚热带气候 ,晚侏罗世为潮湿的暖温带气候 ,早白垩世早期滴道组、下云山组为潮湿的北亚热带气候 ,城子河组、上云山组为潮湿的中亚热带气候 ,穆棱组为潮湿的南亚热带气候
In order to expand the exploration area, paleoclimate data of the peripheral basins in Daqing were studied by palaeontological data. The Jurassic-Early Early Cretaceous strata in the peripheral basins include the Early Miocene East Sea Formation in the Hailar Basin, the Suibin Formation in the Suibin Fault in the Middle Jurassic Sanjiang Basin, the Dongrong Formation in the Late Jurassic Sanjiang Formation , The Peide Formation, the Qihulin Formation in the Hulin Basin, the Jixi Basin in the Early Cretaceous, the Didao Formation in the Sanjiang Basin, the Chengzihe Formation, the Muling Formation, the Xiayunshan Formation in the Hulin Basin, the Shangyunshan Formation, In these groups, except for Late Jurassic Dongrong Formation, PeiDe Formation and Qihulin Formation, all other groups have rich sporopollen fossils. No layer of sporopollen fossils was found. Based on the plant fossils, the Early Jurassic Donggong Formation was humid and warm temperate climate, the Middle Jurassic Suibin Formation was humid and humid subtropical climate, and the Late Jurassic was humid and warm In the temperate climate, the early drifting channel in the Early Cretaceous and the Xiayunshan Formation in the humid northern subtropical climate, the Chengzihe Formation and the Shangyunshan Formation in the humid subtropical climate, and the Muling Formation in the humid southern subtropical climate