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DOI | 10.1038/s41561-019-0451-2 |
Extensive crustal extraction in Earth's early history inferred from molybdenum isotopes | |
McCoy-West, Alex J.1,2; Chowdhury, Priyadarshi2; Burton, Kevin W.1; Sossi, Paolo3; Nowell, Geoff M.1; Fitton, J. Godfrey4; Kerr, Andrew C.5; Cawood, Peter A.2; Williams, Helen M.1,6 | |
2019-11-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:11页码:946-+ |
文章类型 | Article |
语种 | 英语 |
国家 | England; Australia; Switzerland; Scotland; Wales |
英文摘要 | Estimates of the volume of the earliest crust based on zircon ages and radiogenic isotopes remain equivocal. Stable isotope systems, such as molybdenum, have the potential to provide further constraints but remain underused due to the lack of complementarity between mantle and crustal reservoirs. Here we present molybdenum isotope data for Archaean komatiites and Phanerozoic komatiites and picrites and demonstrate that their mantle sources all possess subchondritic signatures complementary to the superchondritic continental crust. These results confirm that the present-day degree of mantle depletion was achieved by 3.5 billion years ago and that Earth has been in a steady state with respect to molybdenum recycling. Mass balance modelling shows that this early mantle depletion requires the extraction of a far greater volume of mafic-dominated protocrust than previously thought, more than twice the volume of the continental crust today, implying rapid crustal growth and destruction in the first billion years of Earth's history. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493905700018 |
WOS关键词 | CONTINENTAL-GROWTH ; MANTLE ; FRACTIONATION ; MO ; KOMATIITES ; GEOCHEMISTRY ; DIFFERENTIATION ; CONSTRAINTS ; SUBDUCTION ; SYSTEMS |
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/223768 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Durham, Dept Earth Sci, Durham, England; 2.Monash Univ, Sch Earth Atmosphere & Environm, Clayton, Vic, Australia; 3.Swiss Fed Inst Technol, Inst Geochem & Petr, Zurich, Switzerland; 4.Univ Edinburgh, Sch GeoSci, Edinburgh, Midlothian, Scotland; 5.Cardiff Univ, Sch Earth & Ocean Sci, Cardiff, S Glam, Wales; 6.Univ Cambridge, Dept Earth Sci, Cambridge, England |
推荐引用方式 GB/T 7714 | McCoy-West, Alex J.,Chowdhury, Priyadarshi,Burton, Kevin W.,et al. Extensive crustal extraction in Earth's early history inferred from molybdenum isotopes[J]. NATURE GEOSCIENCE,2019,12(11):946-+. |
APA | McCoy-West, Alex J..,Chowdhury, Priyadarshi.,Burton, Kevin W..,Sossi, Paolo.,Nowell, Geoff M..,...&Williams, Helen M..(2019).Extensive crustal extraction in Earth's early history inferred from molybdenum isotopes.NATURE GEOSCIENCE,12(11),946-+. |
MLA | McCoy-West, Alex J.,et al."Extensive crustal extraction in Earth's early history inferred from molybdenum isotopes".NATURE GEOSCIENCE 12.11(2019):946-+. |
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