Biostratigraphy and microfacies of Upper Cretaceous oceanic red beds from the northern Tethyan Himalaya in Gyangze, southern Tibet of China

doi:10.1016/j.palaeo.2025.113152

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	Biostratigraphy and microfacies of Upper Cretaceous oceanic red beds from the northern Tethyan Himalaya in Gyangze, southern Tibet of China
	Li, Yuewei 1,2,3; Li, Guobiao 1,2; Jiang, Ganqing 4; Wang, Tianyang 5; Bao, Kezhantu 1,2; Xie, Dan 3; Wang, Jingjing 1,2; Ding, Jie 1,2; Wang, Chengshan 1,2
	2025-10-15
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	676 页码:20
通讯作者	Li, Guobiao(liguobiao@cugb.edu.cn)
摘要	The Cretaceous oceanic (or marine) red beds (CORBs) and their implications for "oceanic oxic events" have attracted enormous attention of geologists worldwide. In southern Tibet, the CORBs are widely distributed in Upper Cretaceous strata of the northern Tethyan Himalaya (NTH). One of the well-exposed, CORB-bearing, mixed carbonate-shale sequences in the NTH is outcropped in the Bangguolai section of Rilang Township, Gyangze County, southern Tibet of China. Well-preserved CORBs of the Chuangde Formation in the Bangguolai section consist of reddish shale, limestone and marlstone with interbeds of siltstone, which overlie the Jiabula/ Gyabula Formation (mainly shale) and underlie the Zongzhuo Formation ("melange"). The precise age, depositional environments, and regional/global correlation of the CORBs of the Chuangde Formation and their implications for synchronous vs. diachronous oceanic oxic events remain uncertain. This paper reports a comprehensive analysis of foraminiferal biostratigraphy, microfacies, and carbon isotopes for the CORB-bearing Chuangde Formation and the upper Jiabula Formation of the Bangguolai section. Detailed foraminiferal biostratigraphy of the Chuangde Formation reveals four planktic foraminiferal biozones including Globotruncanita elevata, Contusotruncana plummerae, Radotruncana calcarata and Globotruncanella havanensis, confirming that the Chuangde Formation (and CORBs) is of Campanian age, which is broadly correlatable with the typical Upper Cretaceous CORBs of pelagic-hemipelagic settings in other areas of the NTH in southern Tibet. Field and petrographic analyses identify eight microfacies and four facies associations for the Upper Cretaceous strata in Gyangze and its adjacent areas. In particular, the microfacies features and microfossil assemblages of CORBs in Gyangze and Kangmar areas indicate that the planktic foraminiferal packstone/grainstone CORBs were deposited from outer shelf to upper slope depositional environments, whereas the radiolarian chert CORBs may have deposited from deep-water, basinal environments below CCD (carbonate compensation depth). The positive and negative delta 13C excursions, anchored by key microfossil zonal boundaries, indicate that the Upper Cretaceous CORBs are synchronous in the eastern Tethys and other regions of the Northern Hemisphere.
关键词	CORBs Planktic foraminiferal biostratigraphy Microfacies Late Cretaceous Gyangze
DOI	10.1016/j.palaeo.2025.113152
关键词[WOS]	CARBON-ISOTOPE STRATIGRAPHY ; PLANKTONIC-FORAMINIFERA ; ANOXIC EVENTS ; SECTION ; GEOCHEMISTRY ; SEDIMENTS ; BOUNDARY ; ORIGIN ; CORBS ; ALPS
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41972031] ; National Natural Science Foundation of China[41272030] ; National Natural Science Foundation of China[40972026] ; Strategic Project of Science and Technology of Chinese Academy of Sciences[XDB050105003] ; National Basic Research Program of China[2012CB822001] ; National Basic Research Program of China[IGCP 608] ; National Basic Research Program of China[679]
项目资助者	National Natural Science Foundation of China ; Strategic Project of Science and Technology of Chinese Academy of Sciences ; National Basic Research Program of China
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:001542804500002
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/24833
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Li, Guobiao
作者单位	1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China 2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 4.Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA 5.Chinese Acad Sci, Inst Qinghai Tibet Plateau, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, Yuewei,Li, Guobiao,Jiang, Ganqing,et al. Biostratigraphy and microfacies of Upper Cretaceous oceanic red beds from the northern Tethyan Himalaya in Gyangze, southern Tibet of China[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2025,676:20.
APA	Li, Yuewei.,Li, Guobiao.,Jiang, Ganqing.,Wang, Tianyang.,Bao, Kezhantu.,...&Wang, Chengshan.(2025).Biostratigraphy and microfacies of Upper Cretaceous oceanic red beds from the northern Tethyan Himalaya in Gyangze, southern Tibet of China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,676,20.
MLA	Li, Yuewei,et al."Biostratigraphy and microfacies of Upper Cretaceous oceanic red beds from the northern Tethyan Himalaya in Gyangze, southern Tibet of China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 676(2025):20.