Earliest Triassic microbialite micro- to megastructures in the Huaying   area of Sichuan Province, South China: Implications for the nature of   oceanic conditions after the end-Permian extinction

doi:10.1669/0883-1351(2003)018&lt;0388:ETMMTM&gt;2.0.CO;2

CORC > 北京大学 > 地球与空间科学学院

	Earliest Triassic microbialite micro- to megastructures in the Huaying area of Sichuan Province, South China: Implications for the nature of oceanic conditions after the end-Permian extinction
	Ezaki, Y ; Liu, JB ; Adachi, N
刊名	palaios
	2003
关键词	MASS EXTINCTION NANPANJIANG BASIN GREAT BANK NEW-MEXICO STROMATOLITES CARBONATE FACIES REEF BOUNDARY CYANOBACTERIA
DOI	10.1669/0883-1351(2003)018<0388:ETMMTM>2.0.CO;2
英文摘要	The end-Permian extinction reflects one of the greatest biotic crises in earth history. Evidence of the event and its aftermath is well preserved in Permian/Triassic transitional strata of Sichuan Province in South China, originally deposited in the western part of the Yangtze epicontinental sea. Lowest Triassic strata (the Hindeodus parvus conodont Zone) lie. with apparent conformity on uppermost Permian skeletal packstone and wackestone, and are overlain by deeper subtidal thinly bedded argillaceous lime mudstone. These beds are characterized by thrombolitic mesostructures that exhibit macrostructures of highly variable columnar shapes, showing a distinctive stratigraphic succession in bed form from planar to domed and subspherical forms. Spheroidal and ellipsoidal micritic bodies (30 mum in average diameter) are preserved in clusters and are interpreted as calcified coccoidal microbes. The earliest Triassic thrombolitic columns and masses are considered to have been constructed by vertical and lateral accretion of mesoclots of microbial origin. Even after the end-Permian extinction, microbial formation of carbonates apparently predominated in Sichuan in localized subtidal to intertidal environments. Microbialites that formed immediately after the end-Permian extinction represent not only disaster-related forms in stressed environments, but also space- and time-specific, environmentally induced carbonates that may be related in part to the causal mechanism of extinction and delay of biotic recovery. The microbialite sequences in Sichuan Province, South China provide a glimpse of the pre-existing "background" and following "foreground" microbial world, and hence a window that was open temporarily in the post-extinction interval.; Geology; Paleontology; SCI(E); 73; ARTICLE; 4-5; 388-402; 18
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/400554]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Ezaki, Y,Liu, JB,Adachi, N. Earliest Triassic microbialite micro- to megastructures in the Huaying area of Sichuan Province, South China: Implications for the nature of oceanic conditions after the end-Permian extinction[J]. palaios,2003.
APA	Ezaki, Y,Liu, JB,&Adachi, N.(2003).Earliest Triassic microbialite micro- to megastructures in the Huaying area of Sichuan Province, South China: Implications for the nature of oceanic conditions after the end-Permian extinction.palaios.
MLA	Ezaki, Y,et al."Earliest Triassic microbialite micro- to megastructures in the Huaying area of Sichuan Province, South China: Implications for the nature of oceanic conditions after the end-Permian extinction".palaios (2003).