A unique suit of Wuchiapingian marine red beds in central China representing a specific paleogeography and paleoclimate association

doi:10.1016/j.marpetgeo.2023.106190

	A unique suit of Wuchiapingian marine red beds in central China representing a specific paleogeography and paleoclimate association
	Cheng, Cheng 1,2,4; Shan, Zi'an 1; Shan, Mingyu 1; Zhou, Zhonglai 1; Ren, Bingyan 1; Chu, Yike 1; Li, Shuangying 3; Wang, Dan 1; Wang, Hongzuo 1; Shu, Xujie 1
刊名	MARINE AND PETROLEUM GEOLOGY
	2023-05-01
卷号	151 页码:12
关键词	Yundoutan formation Xikou section Hematite Oxic Warming climate Palaeotethys
ISSN号	0264-8172
DOI	10.1016/j.marpetgeo.2023.106190
通讯作者	Cheng, Cheng(15555138156@163.com) ; Li, Shuangying(lsysteven@126.com)
英文摘要	Marine red beds (MRBs) as a special geological phenomenon have been considered relevant to specific palaeogeographic or paleoclimatic conditions. The Wuchiapingian Yundoutan Formation in Xikou, Shaanxi, Central China is characterized by a huge thick succession of red limestones, which is a unique deposition among marine strata of China during the Wuchiapingian. The lithology, mineralogy, and geochemistry features of the Yundoutan Formation MRBs were analyzed by using techniques of field measurement, polarized optical microscope, field emission scanning electron microscope (FESEM), diffuse absorbance spectroscopy (DAS), X-ray diffraction (XRD), and geochemical analysis, which were used to discuss their origin and palaeogeographic and paleoclimatic responses. The results show that the stain mineral for the MRBs is mainly weakly-crystalline hematite which can not be observed in the FESEM but was detected from the DAS first derivative spectra with featured peaks around 570 nm. The similar trend of Fe with refractory elements and the strong positive correlation between Fe and Al suggest Fe is mainly a terrestrial source. Limestones of the Yundoutan Formation contain different colors including red, light gray, and dark gray. Red limestones have comparable contents of Fe with dark gray limestones, which are larger than that of light gray limestones, but they are depleted in redox-sensitive elements (Cr, Ni, Cu, Zn, Mo, U) and riched in Fe(III) compared with dark gray limestones. Those indicate that the formation of red limestones needs both enough terrestrial Fe and strong oxic conditions. A mechanism proposed for the formation of red limestones was that Fe was transported from the highlands, which were then deposited under a strong oxic environment and transformed into hematite. We suggest the Wuchiapingian MRBs formed in Central China represent a unique paleogeography and palaeoclimate association. During that time, the study area attached to the northern margin of the United North China-Qinling Block received terrestrial materials from its northward highlands, which provided Fe under a warm climate. Meanwhile, the study area located between the South and North China blocks was on the narrow seaway connecting the Palaeotethys and Panthalassa, which produced relatively fast exchanging rates of seawater and thus a high content of oxygen that can easily transform terrestrial-sourced Fe into hematite. The gradual transition among color-different limestones may be driven by the changes in rainfall that influenced river transportation on terrestrial materials or sea-level changes that influenced the redox state of the water-sediment interface.
资助项目	National Natural Science Foundation of China[42002111] ; Fund from the State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[213101] ; Key Laboratory of Stratigraphy and Palaeontology, Ministry of Natural Resources of China[KLSP2103] ; Training Program of Innovation and Entrepreneurship for Undergraduates of Nantong University
WOS关键词	PERMIAN CARBON-ISOTOPE ; BACTERIAL MEDIATION ; ALPS ; PALEOBIOGEOGRAPHY ; STRATIGRAPHY ; AUSTRIA ; RECORDS ; ORIGIN ; INPUT ; TIME
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000992945300001
资助机构	National Natural Science Foundation of China ; Fund from the State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) ; Key Laboratory of Stratigraphy and Palaeontology, Ministry of Natural Resources of China ; Training Program of Innovation and Entrepreneurship for Undergraduates of Nantong University
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/42153]
专题	中国科学院南京地质古生物研究所
通讯作者	Cheng, Cheng; Li, Shuangying
作者单位	1.Nantong Univ, Sch Geog Sci, Nantong 226019, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 3.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China 4.Minist Nat Resources, Key Lab Stratig & Palaeontol, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Cheng,Shan, Zi'an,Shan, Mingyu,et al. A unique suit of Wuchiapingian marine red beds in central China representing a specific paleogeography and paleoclimate association[J]. MARINE AND PETROLEUM GEOLOGY,2023,151:12.
APA	Cheng, Cheng.,Shan, Zi'an.,Shan, Mingyu.,Zhou, Zhonglai.,Ren, Bingyan.,...&Qian, Peng.(2023).A unique suit of Wuchiapingian marine red beds in central China representing a specific paleogeography and paleoclimate association.MARINE AND PETROLEUM GEOLOGY,151,12.
MLA	Cheng, Cheng,et al."A unique suit of Wuchiapingian marine red beds in central China representing a specific paleogeography and paleoclimate association".MARINE AND PETROLEUM GEOLOGY 151(2023):12.