globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2017.11.029
Scopus记录号: 2-s2.0-85035127581
论文题名:
A stable isotope record of late Cenozoic surface uplift of southern Alaska
作者: Bill N.S.; Mix H.T.; Clark P.U.; Reilly S.P.; Jensen B.J.L.; Benowitz J.A.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 482
起始页码: 300
结束页码: 311
语种: 英语
英文关键词: Alaska ; hydrologic cycle ; paleoaltimetry ; paleoenvironmental change ; stable isotopes ; surface uplift
Scopus关键词: Distillation ; Moisture ; Alaska ; Hydrologic cycles ; Paleoaltimetry ; Paleoenvironmental change ; Stable isotopes ; Isotopes ; altimetry ; Cenozoic ; distillation ; hydrogen isotope ; hydrological cycle ; isotopic composition ; paleoclimate ; paleoenvironment ; Pliocene-Pleistocene boundary ; seasonality ; stable isotope ; tectonic setting ; uplift ; Canada ; Yukon Territory
英文摘要: Although the timing of an acceleration in late-Cenozoic exhumation of southern Alaska is reasonably well constrained as beginning ∼5–∼6 Ma, the surface uplift history of this region remains poorly understood. To assess the extent of surface uplift relative to rapid exhumation, we developed a stable isotope record using the hydrogen isotope composition (δD) of paleo-meteoric water over the last ∼7 Ma from interior basins of Alaska and Yukon Territory. Our record, which is derived from authigenic clays (δDclay) in silicic tephras, documents a ∼50–60‰ increase in δD values from the late Miocene (∼6–∼7 Ma) through the Plio-Pleistocene transition (∼2–∼3 Ma), followed by near-constant values over at least the last ∼2 Ma. Although this enrichment trend is opposite that of a Rayleigh distillation model typically associated with surface uplift, we suggest that it is consistent with indirect effects of surface uplift on interior Alaska, including changes in aridity, moisture source, and seasonality of moisture. We conclude that the δDclay record documents the creation of a topographic barrier and the associated changes to the climate of interior Alaska and Yukon Territory. © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110138
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: College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, United States; Institute of Earth Sciences, University of Iceland, Reykjavík, 101, Iceland; Department of Environmental Studies and Sciences, Santa Clara University, Santa Clara, CA 95053, United States; Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada; Royal Alberta Museum, Edmonton, Alberta T5N 0M6, Canada; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK 99775, United States

Recommended Citation:
Bill N.S.,Mix H.T.,Clark P.U.,et al. A stable isotope record of late Cenozoic surface uplift of southern Alaska[J]. Earth and Planetary Science Letters,2018-01-01,482
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