Isochronline in chemostratigraphy for global correlation and an exception of the Walther's law of facies

doi:10.1111/iar.12470

	Isochronline in chemostratigraphy for global correlation and an exception of the Walther's law of facies
	Wang, Wei 1,2
刊名	ISLAND ARC
	2022
卷号	31 期号:1 页码:15
关键词	chemostratigraphy facies-independent proxy global correlation grid mapping isochronline lateral strata measurement law of facies
ISSN号	1038-4871
DOI	10.1111/iar.12470
通讯作者	Wang, Wei(weiwang@nigpas.ac.cn)
英文摘要	Chemostratigraphy based on various proxies has been well developed in recent decades for stratigraphic correlation by higher resolution, gap-less sampling, and environmental records. At present, various types of samples are measured quantitatively in higher accuracy and wider application than traditional biostratigraphy. Even the benthonic index fossils are widely replaced by pelagic data for biostratigraphic correlation, fossil gaps also could cause data break in a section. However, chemostratigraphy remains challenge as its data from sediments is to resolve mixtureof local depositional environment and global correlatable signal. How to separate these two parts and extract the local imprints free from the mixture is the subject of this study. An isochronlines is a newly introduced auxiliary line for the globally correlatable signal extraction from the mixture signals. An isochronline is a virtual synchronous line on plane of an equal depositional environment, and can evaluate the global signal unlike the chemostratigraphic data that provides environmental records. Based on the data obtained from lateral stratigraphic investigation along a bed strike, or from grid mapping on a wide-open outcrop of a bedding plane, or on a surface of a lithological unit, the facies-independent chemostratigraphic proxies could be extracted. A set of methods was designed including lateral profiling and grid mapping on the outcrop to extract the facies-independent geochemical signal for global correlation based on isochronlines identification, and an exception of the Walther's law of facies was revealed. Meanwhile, the author presents examples to avoid misleading of the global chemostratigraphic correlation based on isochronline analysis. This method included measurement of two-wing lateral-vertical strata, determination of non-lithological lens from geochemical abnormities of diagenesis, and microhabitat. An example from Laibin Auxiliary boundary Stratotype Section and Point of Lopingian-Guadalupian of Permian was measured by grid mapping, that revealed the isochronlines, extracted facies-independent geochemical proxies for global correlation, and hidden geochemical lenses.
资助项目	National Natural Science Foundation of China[42130206] ; National Natural Science Foundation of China[41227801] ; National Natural Science Foundation of China[41273004] ; SPRP of CAS[XDB26000000]
WOS关键词	STRONTIUM ISOTOPE STRATIGRAPHY ; PERMIAN-TRIASSIC BOUNDARY ; SEA-LEVEL ; CARBON ; OXYGEN ; SECTION ; SR-87/SR-86 ; RESOLUTION ; BIOSTRATIGRAPHY ; CONSTRAINTS
WOS研究方向	Geology
语种	英语
出版者	WILEY
WOS记录号	WOS:000884252500001
资助机构	National Natural Science Foundation of China ; SPRP of CAS
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/41462]
专题	中国科学院南京地质古生物研究所
通讯作者	Wang, Wei
作者单位	1.Chinese Acad Sci, Ctr Excellence Life & Palaeoenvironm, Nanjing, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, State Key Lab Paleobiol & Stratig, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Wei. Isochronline in chemostratigraphy for global correlation and an exception of the Walther's law of facies[J]. ISLAND ARC,2022,31(1):15.
APA	Wang, Wei.(2022).Isochronline in chemostratigraphy for global correlation and an exception of the Walther's law of facies.ISLAND ARC,31(1),15.
MLA	Wang, Wei."Isochronline in chemostratigraphy for global correlation and an exception of the Walther's law of facies".ISLAND ARC 31.1(2022):15.