黑龙江黑宝山-罕达气盆地早白垩世九峰山组年代地层划分  

CHRONOSTRATIGRAPHIC DIVISION OF THE EARLY CRETACEOUS JIUFENGSHAN FORMATION IN HEIBAOSHAN-HANDAQI BASIN,HEILONGJIANG PROVINCE

作　　者：杨雅军[1] 江斌[1] 王筱筝 庞雪娇[1] 石国明 YANG Ya-jun;JIANG Bin;WANG Xiao-zheng;PANG Xue-jiao;SHI Guo-ming(Shenyang Center of China Geological Survey,Shenyang 110034,China;Core and Sample Center of Natural Resources,CGS,Sanhe 065201,Hebei Province,China;Heilongjiang Institute of Natural Resources Survey,Harbin 150036,China)

机构地区：[1]中国地质调查局沈阳地质调查中心,辽宁沈阳110034 [2]自然资源实物地质资料中心,河北三河065201 [3]黑龙江省自然资源调查院,黑龙江哈尔滨150036

出　　处：《地质与资源》2020年第5期403-410,共8页Geology and Resources

基　　金：中国地质调查局项目“全国陆域及海区地质图件更新与共享”(DD20190372);“大兴安岭区域地质调查片区总结与服务产品开发”(DD20160345-17);“松辽盆地西缘扎赉特旗-巴林左旗区域地质调查项目”(DD20190039).

摘　　要：为了确定黑龙江黑宝山-罕达气盆地九峰山组形成的气候环境及时代,对九峰山组生物地层特征进行了系统的总结与对比.植物及其孢粉化石反映了典型的亚热带潮湿气候环境,时代为早白垩世.对九峰山组下部所夹流纹质凝灰岩进行了LA-ICP-MS锆石U-Pb同位素测年,获得了119±0.89 Ma成岩年龄.综合古生物和同位素年龄确定九峰山组形成于早白垩世阿普特阶中晚期,这一研究成果可为东北地区晚中生代区域性地层、成煤时代、含煤盆地对比提供精确的年代依据.The biostratigraphic characteristics of Jiufengshan Formation in Heibaoshan-Handaqi Basin of Heilongjiang Province are systematically summarized and compared to determine the climatic environment and age of its formation.The plants and their sporopollen fossils reflect the typical subtropical humid climate and age of Early Cretaceous.The diagenetic age of 119±0.89 Ma is obtained by the LA-ICP-MS zircon U-Pb isotopic dating of rhyolitic tuff in the lower part of Jiufengshan Formation.Combined with the paleontology and isotopic age,it is determined that Jiufengshan Formation was formed in the middle-late Aptian of Early Cretaceous,which provides accurate chronological basis for the correlation of Late Mesozoic regional strata,coal-forming ages and coal-bearing basins in Northeast China.

关 键 词：黑宝山-罕达气盆地 九峰山组 年代地层 阿普特阶中晚期 黑龙江省 

分 类 号：P534.53[天文地球—古生物学与地层学] P597[天文地球—地质学]