气候变化领域集成服务门户(CCPortal): Variability in Sulfur Isotope Records of Phanerozoic Seawater Sulfate

CCPortal

DOI	10.1029/2020GL088766
	Variability in Sulfur Isotope Records of Phanerozoic Seawater Sulfate
	Present T.M.; Adkins J.F.; Fischer W.W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	The δ34S of seawater sulfate reflects processes operating at the nexus of sulfur, carbon, and oxygen cycles. However, knowledge of past seawater sulfate δ34S values must be derived from proxy materials that are impacted differently by depositional and postdepositional processes. We produced new time series estimates for the δ34S value of seawater sulfate by combining 6,710 published data from three sedimentary archives—marine barite, evaporites, and carbonate-associated sulfate—with updated age constraints on the deposits. Robust features in multiple records capture temporal trends in the δ34S value of seawater and its interplay with other Phanerozoic geochemical and stratigraphic trends. However, high-frequency discordances indicate that each record is differentially prone to depositional biases and diagenetic overprints. The amount of noise, quantified from the variograms of each record, increases with age for all δ34S proxies, indicating that postdepositional processes obscure detailed knowledge of seawater sulfate's δ34S value deeper in time. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Deposition; Seawater; Stratigraphy; Sulfur; Age constraints; Carbonate-associated sulfates; Diagenetics; Evaporites; High frequency HF; Oxygen cycle; Sulfur isotope; Temporal trends; Sulfur compounds; age determination; depositional environment; diagenesis; historical record; isotopic analysis; marine sediment; Phanerozoic; proxy climate record; seawater; sulfate; sulfur isotope; time series analysis
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169726
作者单位	California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Present T.M.,Adkins J.F.,Fischer W.W.. Variability in Sulfur Isotope Records of Phanerozoic Seawater Sulfate[J],2020,47(18).
APA	Present T.M.,Adkins J.F.,&Fischer W.W..(2020).Variability in Sulfur Isotope Records of Phanerozoic Seawater Sulfate.Geophysical Research Letters,47(18).
MLA	Present T.M.,et al."Variability in Sulfur Isotope Records of Phanerozoic Seawater Sulfate".Geophysical Research Letters 47.18(2020).