黑龙江嘉荫乌云组地层划分及时代的新认识  

Some New Knowledge on Subdivisions and Age of Wuyun Formation in Jiayin of Heilongjiang, China

作　　者：孙革[1] 全成[1] 孙春林[1] 孙跃武[1] 雒昆利[2] 吕建生[1] 

机构地区：[1]吉林大学古生物学与地层学研究中心,吉林长春130026 [2]中国科学院地理科学与资源研究所,北京100101

出　　处：《吉林大学学报（地球科学版）》2005年第2期137-142,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金国际(地区)合作重大项目(30220130698)

摘　　要：黑龙江嘉荫乌云煤矿等地的早第三纪乌云组及其植物群的划分、对比及时代等问题长期争论。笔者等在乌云组下部发现以Tiliaephyllum tsagajanicum 等为标志的大植物及孢粉化石组合,显示古新世达宁早期的时代。并据此将乌云组划分为两段:下段为“白山头段”(新建),代表乌云组下部的地层,时代为达宁早期;上段为“含煤段”,时代可能主要为达宁晚期。结合与北邻俄罗斯布列亚盆地同期地层及植物群的对比,认为整个乌云组应与上查加扬组(并包括中查加扬组上部)相对比。嘉荫乌云露天煤矿所出露的含煤地层及其植物化石的时代,仅大体上属于古新世达宁晚期,并非达宁期全部。There have been controversies on the subdivisions and geological age of the coal-bearing Wuyun Formation in Jiayin of Heilongjiang, China. Recently, the authors have found the early Danian florule characterized by Tiliaephyllum tsagajanicum, including mega- and microfossil plants, from the lower part of the Wuyun Formation in the Baishantou section area of Jiayin along the right bank of the Heilongjiang River. Based mainly on the discovery, the authors proposed the Wuyun Formation subdivided into two members: the lower member (Baishantou Member) of the formation representing the lower Danian; and the upper member (Coal-bearing Member) representing mainly the upper Danian. Correlating the Wuyun Formation to its equivalents in the Bureya Basin of Russia, the authors consider that the Wuyun Formation is basically corresponding to the Upper Tsagayan Formation and the upper part of Middle Tsagayan Formation in the Bureya Basin. The plant fossils collected previously from the Wuyun Opencut Coal-mine, are probably aged in late Danian only.

关 键 词：乌云组 白山头段 古新世这宁早期 嘉荫 黑龙江 

分 类 号：P534.61[天文地球—古生物学与地层学]