AGE OF THE HUOLINHE FORMATION IN THE HUOLINHE BASIN, EASTERN INNER MONGOLIA, CHINA: EVIDENCE FROM U-Pb ZIRCON DATING AND PALYNOLOGICAL ASSEMBLAGES

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	AGE OF THE HUOLINHE FORMATION IN THE HUOLINHE BASIN, EASTERN INNER MONGOLIA, CHINA: EVIDENCE FROM U-Pb ZIRCON DATING AND PALYNOLOGICAL ASSEMBLAGES
	Shi Gongle1 ; Li Jianguo1 ; Tan Tan 1; Dong Chong 1; Li Qiuli 2; Wu Qiong 3; Zhang Bole 4; Yin Suxin 1; Herrera Fabiany 5; Herendeen Patrick S 5
	2021
发表期刊	JOURNAL OF STRATIGRAPHY
ISSN	0253-4959
卷号	45 期号:1 页码:69-81
摘要	The Huolinhe Formation in the Huolinhe Basin, eastern Inner Mongolia is one of the most important Lower Cretaceous coal-bearing strata in China, yielding abundant, diverse, and well-preserved plant fossils. Its precise age, however, is poorly known due to lack of associated marine deposits and volcanic beds. Here we present U-Pb zircon ages, and the associated palynological assemblages of an ash layer of the Huolinhe Formation recently discovered at the Zhahanaoer open-cast coal mine in Jarud Banner. Stratigraphic analyses based on boreholes suggest that the ash layer occurs near the bottom of the “lower coal-bearing member” of the Huolinhe Formation. U-Pb zircon geochronology using the SIMS method constrains the depositional age of the ash layer to be 125.6±1.0 Ma (late Barremian-earliest Aptian), and this is consistent with the result from LA-ICP-MS analyses of the same sample. A late Barremian-earliest Aptian age for the ash layer is also supported by the palynological assemblage associated with the layer, in which the pollen of gymnosperms and the spores of ferns and bryophytes are dominant, angiosperm pollen is very rare and represented by only Clavatipollenites. This study contributes important new data for understanding the age of the entire Huolinhe Formation and also provides a more precise maximum age for the key plant fossils preserved in the deposits above the ash layer.
关键词	霍林河组早白垩世含煤盆地 U-Pb地质年代学孢子花粉内蒙古 Huolinhe Formation Early Cretaceous coal-bearing basin U-Pb geochronology pollen and spores Inner Mongolia
语种	英语
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/41958
专题	中国科学院南京地质古生物研究所
作者单位	1.中国科学院南京地质古生物研究所 2.中国科学院地质与地球物理研究所 3.南京大学 4.Qingdao Research Institute of Geotechnical Prospecting and Surveying 5.Chicago Botanic Garden 6.耶鲁大学
第一作者单位	中国科学院南京地质古生物研究所
推荐引用方式 GB/T 7714	Shi Gongle,Li Jianguo,Tan Tan,et al. AGE OF THE HUOLINHE FORMATION IN THE HUOLINHE BASIN, EASTERN INNER MONGOLIA, CHINA: EVIDENCE FROM U-Pb ZIRCON DATING AND PALYNOLOGICAL ASSEMBLAGES[J]. JOURNAL OF STRATIGRAPHY,2021,45(1):69-81.
APA	Shi Gongle.,Li Jianguo.,Tan Tan.,Dong Chong.,Li Qiuli.,...&Crane Peter R.(2021).AGE OF THE HUOLINHE FORMATION IN THE HUOLINHE BASIN, EASTERN INNER MONGOLIA, CHINA: EVIDENCE FROM U-Pb ZIRCON DATING AND PALYNOLOGICAL ASSEMBLAGES.JOURNAL OF STRATIGRAPHY,45(1),69-81.
MLA	Shi Gongle,et al."AGE OF THE HUOLINHE FORMATION IN THE HUOLINHE BASIN, EASTERN INNER MONGOLIA, CHINA: EVIDENCE FROM U-Pb ZIRCON DATING AND PALYNOLOGICAL ASSEMBLAGES".JOURNAL OF STRATIGRAPHY 45.1(2021):69-81.