DOI: 10.1016/j.epsl.2018.02.001
Scopus记录号: 2-s2.0-85044039094
论文题名: Temperature evolution and the oxygen isotope composition of Phanerozoic oceans from carbonate clumped isotope thermometry
作者: Henkes G.A. ; Passey B.H. ; Grossman E.L. ; Shenton B.J. ; Yancey T.E. ; Pérez-Huerta A.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 490 起始页码: 40
结束页码: 50
语种: 英语
英文关键词: carbonate clumped isotopes
; Late Paleozoic brachiopods
; paleoclimate evolution
; paleothermometry
; seawater oxygen isotope composition
英文摘要: Surface temperature is among the most important parameters describing planetary climate and habitability, and yet there remains considerable debate about the temperature evolution of the Earth's oceans during the Phanerozoic Eon (541 million years ago to present), the time during which complex metazoan life radiated on Earth. Here we critically assess the emerging record of Phanerozoic ocean temperatures based on carbonate clumped isotope thermometry of fossil brachiopod and mollusk shells, and we present new data that fill important gaps in the Late Paleozoic record. We evaluate and reject the hypothesis that solid-state reordering of 13C–18O bonds has destroyed the primary clumped isotope temperature signal of most fossils during sedimentary burial at elevated temperatures. The resulting Phanerozoic record, which shows a general coupling between tropical seawater temperatures and atmospheric carbon dioxide (CO2) levels since the Paleozoic, indicates that tropical temperatures during the icehouse climate of the Carboniferous period were broadly similar to present (∼25–30 °C), and suggests that benthic metazoans were able to thrive at temperatures of 35–40 °C during intervals of the early and possibly the latest Paleozoic when CO2 levels were likely 5–10× higher than present-day values. Equally important, there is no resolvable trend in seawater oxygen isotope ratios (δ18O) over the past ∼500 million years, indicating that the average temperature of oxygen exchange between seawater and the oceanic crust has been high (∼270 °C) since at least the early Paleozoic, which points to mid-ocean ridges as the dominant locus of water–rock interaction over the past half-billion years. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109944
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Geosciences, Stony Brook University, Earth and Space Science Building, Stony Brook, NY 11794, United States; Department of Earth and Environmental Sciences, University of Michigan, 1100 N. University Avenue, Ann Arbor, MI 48109, United States; Department of Geology and Geophysics, Texas A&M University, MS 3115, College Station, TX 77843, United States; ExxonMobil, Houston, TX, United States; Department of Geological Sciences, The University of Alabama, Box 870338, Tuscaloosa, AL 35487, United States
Recommended Citation:
Henkes G.A.,Passey B.H.,Grossman E.L.,et al. Temperature evolution and the oxygen isotope composition of Phanerozoic oceans from carbonate clumped isotope thermometry[J]. Earth and Planetary Science Letters,2018-01-01,490