globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.02.032
论文题名:
Modern foraminifera, δ13C, and bulk geochemistry of central Oregon tidal marshes and their application in paleoseismology
作者: Engelhart S.E.; Horton B.P.; Vane C.H.; Nelson A.R.; Witter R.C.; Brody S.R.; Hawkes A.D.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 377
起始页码: 13
结束页码: 27
语种: 英语
英文关键词: δ13C ; Bulk geochemistry ; Cascadia ; Earthquake ; Foraminifera ; Oregon ; Paleoseismology ; Relative sea level
英文摘要: We assessed the utility of δ13C and bulk geochemistry (total organic content and C:N) to reconstruct relative sea-level changes on the Cascadia subduction zone through comparison with an established sea-level indicator (benthic foraminifera). Four modern transects collected from three tidal environments at Siletz Bay, Oregon, USA, produced three elevation-dependent groups in both the foraminiferal and δ13C/bulk geochemistry datasets. Foraminiferal samples from the tidal flat and low marsh are identified by Miliammina fusca abundances of >45%, middle and high marsh by M. fusca abundances of <45% and the highest marsh by Trochamminita irregularis abundances >25%. The δ13C values from the groups defined with δ13C/bulk geochemistry analyses decrease with an increasing elevation; -24.1±1.7‰ in the tidal flat and low marsh; -27.3±1.4‰ in the middle and high marsh; and -29.6±0.8‰ in the highest marsh samples. We applied the modern foraminiferal and δ13C distributions to a core that contained a stratigraphic contact marking the great Cascadia earthquake of AD 1700. Both techniques gave similar values for coseismic subsidence across the contact (0.88±0.39m and 0.71±0.56m) suggesting that δ13C has potential for identifying amounts of relative sea-level change due to tectonics. © 2013 Elsevier B.V.
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被引频次[WOS]:40   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69751
Appears in Collections:过去全球变化的重建

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作者单位: Department of Geosciences, University of Rhode Island, Woodward Hall, 9 East Alumni Avenue, Kingston, RI 02881, United States; Sea Level Research, Department of Earth and Environmental Science, University of Pennsylvania, Hayden Hall, 240 South 33rd St, Philadelphia, PA 19104, United States; Sea Level Research, Institute of Marine and Coastal Sciences, School of Environmental and Biological Sciences, Rutgers University, 71 Dudley Road, New Brunswick, NJ 08901, United States; British Geological Survey, Kingsley Dunham Centre, Keyworth, Nottingham, NG12 5GG, United Kingdom; Geologic Hazards Science Center, US Geological Survey, 1711 Illinois St., Golden, CO 80401, United States; Alaska Science Center, US Geological Survey, 4200 University Drive, Anchorage, AK 99508, United States; Nicholas School of the Environment, Duke University, Box 90328, Durham, NC 27708, United States; Department of Geography and Geology, University of North Carolina Wilmington, Wilmington, NC 28403, United States

Recommended Citation:
Engelhart S.E.,Horton B.P.,Vane C.H.,et al. Modern foraminifera, δ13C, and bulk geochemistry of central Oregon tidal marshes and their application in paleoseismology[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,377
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