黑龙江省东部裴德组砾石中放射虫的发现及其意义

裴德组原指分布在黑龙江省东部龙爪沟群下部、中生代海相化石层之下的一套含煤的陆相火山碎屑岩地层,所含植物化石一般认为属于ConiopterisPhoenicopsis植物群的中侏罗世组合。裴德组下部的砾石中发现了放射虫化石,鉴定和对比的结果表明这些砾石来自东部的那丹哈达地体。对佳木斯地体和那丹哈达地体拼贴时限和拼贴地点的进一步分析则建议将“龙爪沟群”解体、裴德组形成的时代修正到白垩纪。

Discovery of the Radiolarians from the Conglomerate of the Peide Formation in Eastern Heilongjiangand Its Tectonostratigraphical Significance

The Peide Formation originally meant a suit ofcoal bearing continentalpyro clastic strata under the marine fossiliferous beds in the lower part of the Longzhaogou Group distributed in the eastern Heilongjiang Province,has long been believed to be Mid dle Jurassic.Thepebblesin the lowerpartofthe Peide Formation yieldsradiolarians.The results ofidentification and correlation show thatthesepebblesderivefrom the Nadanhada terrane to the east.The furtheranalyses oftime range and localities ofthe amalgamation of the Jiamusi and Nadanhada terranes suggest abrogating the name “Longzhaogou Group” and redetermining the age forthe forming ofthe Peide Formation as Cretaceous.