干旱区生态环境知识资源中心(Arid): Unusual shallow marine matground-adapted benthic biofacies from the Lower Triassic of the northern Paleotethys: Implications for biotic recovery following the end-Permian mass extinction

Arid

DOI	10.1016/j.earscirev.2018.07.012
	Unusual shallow marine matground-adapted benthic biofacies from the Lower Triassic of the northern Paleotethys: Implications for biotic recovery following the end-Permian mass extinction
	Feng, Xueqian 1; Chen, Zhong-Qiang 1; Bottjer, David J.2; Wu, Siqi 1; Zhao, Laishi 3; Xu, Yaling 1; Shi, G. R.4; Huang, Yuangeng 1; Fang, Yuheng 1; Tu, Chenyi 1
通讯作者	Chen, Zhong-Qiang ; Bottjer, David J.
来源期刊	EARTH-SCIENCE REVIEWS
ISSN	0012-8252
EISSN	1872-6828
出版年	2019
卷号	189 页码:194-219
英文摘要	We report two shallow marine, ichnofauna-bivalve-microbial mat biofacies from the Lower Triassic Xiahuancang Formation of the southern Qilian area, Qinghai Province, northwestern China, which was located at moderate high paleolatitudes on the northern margin of the Paleotethys Ocean. Paleoenvironmental analyses show that Members I and II of the Xiahuancang Formation represent a shoreface and a lower shoreface to offshore transition setting, respectively. Biofacies 1, recognized from Member I, is characterized by a diverse ichnofauna (including deep-tiers of Rosselia and Diplocraterion), Claraia-dominated bivalves, and microbially induced sedimentary structures (MISSs). Biofacies 2, in succeeding Member II, is dominated by a diverse ichnofauna, epifaunal and shallow infaunal bivalves, and wrinkle structures. Primary co-occurrences, preservational features, and palimpsest or crosscutting relationships of all components within the biofacies indicate that microbial mats, bivalves, and trace-makers actively interacted with one another during deposition. They largely represent contemporaneous biotic associations. Microbial mats are interpreted to have grown under well-oxygenated conditions after storm deposition due to the association of deep-tiering infauna and diverse epifauna as well as well-developed cross-stratification, and the top layer of microbial mats could serve as an oasis for metazoans. Microbial mats not only proliferated in harsh environments, but also coexist with epifauna and deep-tiering infauna in well-oxygenated settings following the end-Permian crisis. Their occurrences in the Early Triassic are unrelated to environmental stresses, which are coincident with their sedimentologic record from other geological time intervals. Apparently, the southern Qilian ichnofauna-bivalve-microbial mat biofacies with juxtaposed epifauna, infauna and MISS- or wrinkle-related microbial mats represents a matground-adapted benthic metazoan ecosystem in the earliest Triassic, which provided sufficient oxygen, food, and other hydrodynamic conditions hospitable for metazoans and ecosystems to recover and reached a fairly high level (recovery stage 3) in a tough time when most biotas suffered biotic depletion and environmental stress. The biotic components in unique biofacies may represent a phase shift community in siliciclastic settings during the Early Triassic.
英文关键词	Ichnodiversity Microbial mats Deep-tiering infauna Phase shifts Unusual biofacies Early Triassic Northwestern China
类型	Article
语种	英语
国家	Peoples R China ; USA ; Australia
收录类别	SCI-E
WOS记录号	WOS:000462692600011
WOS关键词	SOUTH CHINA IMPLICATIONS ; RESOLVING MISS CONCEPTIONS ; TRACE FOSSILS ; WRINKLE STRUCTURES ; MICROBIAL MATS ; ENVIRONMENTAL-INFLUENCES ; ICHNOFOSSIL ASSEMBLAGES ; GEOLOGICAL APPROACH ; ECOSYSTEM RECOVERY ; CARBONATE PLATFORM
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215106
作者单位	1.China Univ Geosci Wuhan, Sch Earth Sci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China; 2.Univ Southern Calif, Dept Earth Sci, Los Angeles, CA 90089 USA; 3.China Univ Geosci Wuhan, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China; 4.Deakin Univ, Sch Life & Environm Sci, Burwood Campus, Melbourne, Vic 3125, Australia
推荐引用方式 GB/T 7714	Feng, Xueqian,Chen, Zhong-Qiang,Bottjer, David J.,et al. Unusual shallow marine matground-adapted benthic biofacies from the Lower Triassic of the northern Paleotethys: Implications for biotic recovery following the end-Permian mass extinction[J],2019,189:194-219.
APA	Feng, Xueqian.,Chen, Zhong-Qiang.,Bottjer, David J..,Wu, Siqi.,Zhao, Laishi.,...&Tu, Chenyi.(2019).Unusual shallow marine matground-adapted benthic biofacies from the Lower Triassic of the northern Paleotethys: Implications for biotic recovery following the end-Permian mass extinction.EARTH-SCIENCE REVIEWS,189,194-219.
MLA	Feng, Xueqian,et al."Unusual shallow marine matground-adapted benthic biofacies from the Lower Triassic of the northern Paleotethys: Implications for biotic recovery following the end-Permian mass extinction".EARTH-SCIENCE REVIEWS 189(2019):194-219.