A new approach to quantifying stratigraphical resolution: application to global stratotypes

doi:10.1111/let.12193

	A new approach to quantifying stratigraphical resolution: application to global stratotypes
	Melchin, MJ; Sheets, HD; Mitchell, CE; Fan, JX (樊隽轩)
	2017
发表期刊	Lethaia
ISSN	0024-1164
卷号	50 期号:3 SI 页码:407-423
摘要	Horizon annealing (HA) provides a method to order all horizons in a chronostratigraphic data set, including marker beds and isotopic excursions, as well as horizons that lack exact local markers (such as taxon first appearances) and are, thus, constrained only by local stratigraphical order. Global stratotype section and point (GSSP) levels placed within an HA composite succession can be precisely correlated with levels in all other sections in the composite that span the same interval. We present two approaches to the quantitative assessment of the uncertainty or error in the placement of horizons within the composite section: a permutation method (jackknife analysis) and a sensitivity analysis (the relaxed fit curve). From jackknife analysis, we calculate a standard deviation (sigma) of the variation in horizon placements and estimate the 95% confidence interval of the variation in horizon placement within the composite. We also directly assess the relative stability of event positions using the results of the jackknife. These approaches provide an objective method for assessing the relative strengths of GSSP candidates, in which we prefer those sections and horizons that are the most precisely controlled in the HA composite. Integration of biostratigraphical, chemostratigraphical and lithostratigraphical marker horizons into the HA process markedly improves levels of constraint within the composite compared to biostratigraphical data alone. In a temporally scaled composite, the 95% confidence intervals on horizon placements could be used to estimate temporal resolution. In our study, we estimate that the average temporal resolution is approximately 319 kyr, which approaches the range of that needed to test hypotheses of orbitally driven cyclicity.
关键词	Global stratotype section and point graptolites horizon annealing Ordovician quantitative stratigraphical correlation Silurian stratigraphical resolution
DOI	10.1111/let.12193
收录类别	SCI
语种	英语
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:000405953500007
出版者	WILEY
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/13603
专题	中国科学院南京地质古生物研究所其他
通讯作者	Melchin, MJ
推荐引用方式 GB/T 7714	Melchin, MJ,Sheets, HD,Mitchell, CE,et al. A new approach to quantifying stratigraphical resolution: application to global stratotypes[J]. Lethaia,2017,50(3 SI):407-423.
APA	Melchin, MJ,Sheets, HD,Mitchell, CE,&Fan, JX .(2017).A new approach to quantifying stratigraphical resolution: application to global stratotypes.Lethaia,50(3 SI),407-423.
MLA	Melchin, MJ,et al."A new approach to quantifying stratigraphical resolution: application to global stratotypes".Lethaia 50.3 SI(2017):407-423.