地质与资源2025，Vol.34Issue(6)：714-720,7.DOI:10.13686/j.cnki.dzyzy.2025.06.005
黑龙江省讷河地区上白垩统Balmeisporites的发现及古环境意义
Discovery of Balmeisporites in the Upper Cretaceous of Nehe area,Heilongjiang Province:Paleoenvironmental implications
摘要
Abstract
The well HND-1 is located near Keshan Farm in Nehe City,northern Songliao Basin.The sporopollen analysis of mudstone from the 69.12-228.70 m interval indicates that the Cretaceous spore-pollen assemblages in this area are dominated by fern spores(56.5％),followed by gymnosperm pollen(43.5％).The most abundant genus identified is Balmeisporites,which is represented by four species.All of these species lack equatorial projections,showing the morphological characteristic consistent with a Late Cretaceous age.The spore-bearing horizon correlates with the Upper Cretaceous Mingshui Formation.The discovery of Balmeisporites not only enriches the fossil assemblage in the area,but also provides key evidence for the paleoenvironmental reconstruction of Mingshui Formation.Integrating the paleoenvironmental indicators from this genus and its associated sporopollen assemblage,it is inferred that Nehe region during the Late Cretaceous experienced a humid,subtropical climate with abundant water resources.关键词
孢粉/白垩纪/巴尔姆孢/明水组/松辽盆地Key words
spore-pollen/Cretaceous/Balmeisporites/Mingshui Formation/Songliao Basin分类
生物科学引用本文复制引用
董辛伟,张德军,杨涛,吴长宇..黑龙江省讷河地区上白垩统Balmeisporites的发现及古环境意义[J].地质与资源,2025,34(6):714-720,7.基金项目
国家自然科学基金项目"古生代-中生代重大转折期极端气候与生物响应"(42293280),"大兴安岭中南部中侏罗世植物群及地层新探"(42172024) （42293280）
中国地质调查局项目"东北地区地层古生物地质调查"(DD20230220) （DD20230220）
辽宁省教育厅基础研究项目(054/92000308087). （054/92000308087）
