Late Miocene fossils from Nainnainxuonla, Nyalam, Xizang,and their implications for paleoenvironment

doi:10.18654/1000-0569/2024.05.04

IVPP-IR

	Late Miocene fossils from Nainnainxuonla, Nyalam, Xizang,and their implications for paleoenvironment
	Li, Qiang; Ni, Xijun; Deng, Tao; Wu, FeiXiang
	2024-05-01
发表期刊	ACTA PETROLOGICA SINICA
ISSN	1000-0569
卷号	40 期号:5 页码:1406-1417
通讯作者	Li, Qiang(mailliqiang@ivpp.ac.cn)
摘要	The southern slope of the Nainnainxuonla Mesa, Nyalam, Xizang (Tibet)preserves thick Neogene sediments of the Dati Paleolake Basin, which is considered crucial for studying the Neogene uplift and environmental changes in the Himalayan region. Remains of the late Late Miocene Hipparion (Cremohipparion)forstenae have been found in the Nainnainxuonla section. Although significant work has been done on the stratigraphy and vertebrate fossils of representative Neogene sedimentary basins in the Himalayas, with emphasis on the Zanda and Gyirong basins, research on the Dati Paleolake Basin remains limited. In 2020, the paleontology team of the Second Comprehensive Scientific Expedition to the Qinghai.Tibet Plateau (QTP), organized by the Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, investigated the Mesozoic.Cenozoic strata and paleontology in the Nyalam region. A small number of vertebrate fossils were discovered from the Nainnainxuonla section, including cyprinid pharyngeal teeth, limb bones of rhinoceroses and hipparion limb bones, and lagomorph cheek teeth. Among these fossils, the lagomorph fossils belong to Bellatonoides eroli, representing the first discovery of this genus in the QTP and indicating an age no later than the early Late Miocene. Two distinct stratigraphic levels and ages have been identified in the Nainnainxuonla section based on mammalian fossils. The upper fluvial facies strata yield H. (C.)forstenae of late Late Miocene (Baodean)age, while the lower lacustrine facies strata yield B. eroli, possibly of early Late Miocene (Bahean)age. During the late Middle to early Late Miocene, B. eroli was typically found at the strata in Ankara, Turkey and central Inner Mongolia, China. It was often associated with primates and other forest.dwelling mammals. H. (C.)forstenae, which is believed to have adapted to open habitats, is distributed in the late Late Miocene strata of Gyirong, Tibet, and Baode, Shanxi. Its altitudinal distribution does not exceed 2900 meters. Based on these fossil evidence, it is reasonable to infer that the Nyalam Dati Paleolake Basin had a paleo.altitude nearly in 2000 meters lower than its current elevation during the early to late Late Miocene. From the early to late Late Mionce, the paleovegetation type changed from the forest environment to the forest.grassland with quite open environment. In general, the paleoenvironment of Nainnainxuonla during the Late Miocene was much more favorable than it is today
DOI	10.18654/1000-0569/2024.05.04
关键词[WOS]	SOUTHERN TIBET ; INNER-MONGOLIA ; PLIOCENE ; EVOLUTION ; CHINESE ; BASIN ; AGE
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:001208845500004
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/23633
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Li, Qiang
作者单位	Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Li, Qiang,Ni, Xijun,Deng, Tao,et al. Late Miocene fossils from Nainnainxuonla, Nyalam, Xizang,and their implications for paleoenvironment[J]. ACTA PETROLOGICA SINICA,2024,40(5):1406-1417.
APA	Li, Qiang,Ni, Xijun,Deng, Tao,&Wu, FeiXiang.(2024).Late Miocene fossils from Nainnainxuonla, Nyalam, Xizang,and their implications for paleoenvironment.ACTA PETROLOGICA SINICA,40(5),1406-1417.
MLA	Li, Qiang,et al."Late Miocene fossils from Nainnainxuonla, Nyalam, Xizang,and their implications for paleoenvironment".ACTA PETROLOGICA SINICA 40.5(2024):1406-1417.