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DOI | 10.1038/NGEO3007 |
Abundant carbon in the mantle beneath Hawai'i | |
Anderson, Kyle R.1; Poland, Michael P.2 | |
2017-09-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Estimates of carbon concentrations in Earth's mantle vary over more than an order of magnitude, hindering our ability to understand mantle structure and mineralogy, partial melting, and the carbon cycle. CO2 concentrations in mantle-derived magmas supplying hotspot ocean island volcanoes yield our most direct constraints on mantle carbon, but are extensively modified by degassing during ascent. Here we show that undegassed magmatic and mantle carbon concentrations may be estimated in a Bayesian framework using diverse geologic information at an ocean island volcano. Our CO2 concentration estimates do not rely upon complex degassing models, geochemical tracer elements, assumed magma supply rates, or rare undegassed rock samples. Rather, we couple volcanic CO2 emission rates with probabilistic magma supply rates, which are obtained indirectly from magma storage and eruption rates. We estimate that the CO2 content of mantle-derived magma supplying Hawai`i's active volcanoes is 0.97(-0.19)(+0.25) wt%-roughly 40% higher than previously believed-and is supplied from a mantle source region with a carbon concentration of 263(-62)(+81) ppm. Our results suggest that mantle plumes and ocean island basalts are carbon-rich. Our data also shed light on helium isotope abundances, CO2/Nb ratios, and may imply higher CO2 emission rates from ocean island volcanoes. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409229600020 |
WOS关键词 | KILAUEA VOLCANO ; MIDOCEAN RIDGES ; OCEAN-RIDGE ; CO2 ; HELIUM ; ERUPTIONS ; MODELS ; FLUXES ; RATES ; PLUME |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35087 |
专题 | 地球科学 气候变化 |
作者单位 | 1.US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA; 2.US Geol Survey, 1300 SE Cardinal Ct, Vancouver, WA 98683 USA |
推荐引用方式 GB/T 7714 | Anderson, Kyle R.,Poland, Michael P.. Abundant carbon in the mantle beneath Hawai'i[J]. NATURE GEOSCIENCE,2017,10(9). |
APA | Anderson, Kyle R.,&Poland, Michael P..(2017).Abundant carbon in the mantle beneath Hawai'i.NATURE GEOSCIENCE,10(9). |
MLA | Anderson, Kyle R.,et al."Abundant carbon in the mantle beneath Hawai'i".NATURE GEOSCIENCE 10.9(2017). |
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