摘要
二连盆地砂岩型铀矿含矿层是一套以河流、沼泽相沉积为主的粗碎屑岩系,含丰富的孢粉化石。目前,该地区含矿地层的时代存在争论。本文通过对巴彦乌拉地区含矿地层中孢粉的综合研究,主要侧重孢子和花粉在地层中的分布特征及国内外孢粉组合的比较,确定其时代为早白垩世晚期的阿普第阿尔必期,沉积时期为温暖潮湿的亚热带气候,且有向半潮湿、半干热的方向发展的趋势。古地理环境以低平、丘陵地势为主,盆地周围有少量中、高山分布。
The sandstone-type uranium ore-bearing strata of Erlian basin is a suit of coarse crumb rocks that are mainly of river and marsh sedimentary faces, age of ore-bearing strata in this area is in dispute. By studying the palynology of ore-bearing strata in Bayanwula area, particularly the distribution of the spore and the pollen in the stratum and the comparison of domestic and the international palynology assemblage, its age of the strata was identified belong to aptian-albian stages of the Later Early Cretaceous （Aptian-Albian） under substropic warm humid climate with the tendency to semihumid and semi-dryhot. The paleo geography was of the low-flat and undulating topography, a few middling and high mountains distributing around the basin.
出处
《铀矿地质》
CAS
CSCD
2008年第3期150-154,共5页
Uranium Geology
关键词
赛汉组
孢粉组合
早白垩世
二连盆地
Saihan formation
palynology assemblage
Early Cretaceous
Erlian basin
