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Carbonated mantle domains at the base of the Earth's transition zone

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Carbonated mantle domains at the base of the Earth's transition zone. / Sun, Wei-dong; Hawkesworth, Chris J.; Yao, Chao; Zhang, Chan-chan; Huang, Rui-fang; Liu, Xi; Sun, Xin-lei; Ireland, Trevor; Song, Mao-shuang; Ling, Ming-xing; Ding, Xing; Zhang, Zhao-feng; Fan, Wei-ming; Wu, Zhong-qing.

In: Chemical Geology, Vol. 478, 05.02.2018, p. 69-75.

Research output: Contribution to journalArticlepeer-review

Harvard

Sun, W, Hawkesworth, CJ, Yao, C, Zhang, C, Huang, R, Liu, X, Sun, X, Ireland, T, Song, M, Ling, M, Ding, X, Zhang, Z, Fan, W & Wu, Z 2018, 'Carbonated mantle domains at the base of the Earth's transition zone', Chemical Geology, vol. 478, pp. 69-75. https://doi.org/10.1016/j.chemgeo.2017.08.001

APA

Sun, W., Hawkesworth, C. J., Yao, C., Zhang, C., Huang, R., Liu, X., Sun, X., Ireland, T., Song, M., Ling, M., Ding, X., Zhang, Z., Fan, W., & Wu, Z. (2018). Carbonated mantle domains at the base of the Earth's transition zone. Chemical Geology, 478, 69-75. https://doi.org/10.1016/j.chemgeo.2017.08.001

Vancouver

Sun W, Hawkesworth CJ, Yao C, Zhang C, Huang R, Liu X et al. Carbonated mantle domains at the base of the Earth's transition zone. Chemical Geology. 2018 Feb 5;478:69-75. https://doi.org/10.1016/j.chemgeo.2017.08.001

Author

Sun, Wei-dong ; Hawkesworth, Chris J. ; Yao, Chao ; Zhang, Chan-chan ; Huang, Rui-fang ; Liu, Xi ; Sun, Xin-lei ; Ireland, Trevor ; Song, Mao-shuang ; Ling, Ming-xing ; Ding, Xing ; Zhang, Zhao-feng ; Fan, Wei-ming ; Wu, Zhong-qing. / Carbonated mantle domains at the base of the Earth's transition zone. In: Chemical Geology. 2018 ; Vol. 478. pp. 69-75.

Bibtex - Download

@article{2bde1ae1b40948eba5f3da7609f119fe,
title = "Carbonated mantle domains at the base of the Earth's transition zone",
abstract = "The oxygen fugacity of the upper mantle is 3–4 orders of magnitude higher than that of the lower mantle and this has been attributed to Fe2+ disproportionating into Fe3+ plus Fe0 at pressures > 24 GPa. The upper mantle might therefore have been expected to have evolved to more oxidizing compositions through geological time, but it appears that the oxygen fugacity of the upper mantle has remained constant for the last 3.5 billion years. Thus, it indicates that the mantle has been actively buffered from the accumulation of Fe3+, and that this is linked to oxidation of diamond to carbonate coupled with reduction of Fe3+ to Fe2+. When subducted plates penetrate into the lower mantle, compensational upwelling transports bridgmanite into the transition zone, where it breaks down to ringwoodite and majorite, releasing the ferric iron. The system returns to equilibrium through oxidation of diamond. Early in Earth history, diamond may have been enriched at the base of the transition zone in the Magma Ocean, because it is denser than peridotite melts at depths shallower than 660 km, and it is more buoyant below. Ongoing oxidation of diamond forms carbonate, leading to relatively high carbonate concentrations in the source of ocean island basalts.",
keywords = "Carbon cycle, Carbon concentration, Elasticity, First-principles calculations, Earth mantle",
author = "Wei-dong Sun and Hawkesworth, {Chris J.} and Chao Yao and Chan-chan Zhang and Rui-fang Huang and Xi Liu and Xin-lei Sun and Trevor Ireland and Mao-shuang Song and Ming-xing Ling and Xing Ding and Zhao-feng Zhang and Wei-ming Fan and Zhong-qing Wu",
note = "This study was supported by National Key R&D Program of China 2016YFC0600408, CASXDB18020000, NSFC91328204 to W.D.S., State Key Development Program of Basic Research of China (2014CB845905), NSFC41274087 to Z.Q.W. 41090371 to X.L. TRI acknowledges a Chinese Academy of Sciences President's International Fellowship for visiting scientists Grant No. 2015VEA003.",
year = "2018",
month = feb,
day = "5",
doi = "10.1016/j.chemgeo.2017.08.001",
language = "English",
volume = "478",
pages = "69--75",
journal = "Chemical Geology",
issn = "0009-2541",
publisher = "Elsevier",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Carbonated mantle domains at the base of the Earth's transition zone

AU - Sun, Wei-dong

AU - Hawkesworth, Chris J.

AU - Yao, Chao

AU - Zhang, Chan-chan

AU - Huang, Rui-fang

AU - Liu, Xi

AU - Sun, Xin-lei

AU - Ireland, Trevor

AU - Song, Mao-shuang

AU - Ling, Ming-xing

AU - Ding, Xing

AU - Zhang, Zhao-feng

AU - Fan, Wei-ming

AU - Wu, Zhong-qing

N1 - This study was supported by National Key R&D Program of China 2016YFC0600408, CASXDB18020000, NSFC91328204 to W.D.S., State Key Development Program of Basic Research of China (2014CB845905), NSFC41274087 to Z.Q.W. 41090371 to X.L. TRI acknowledges a Chinese Academy of Sciences President's International Fellowship for visiting scientists Grant No. 2015VEA003.

PY - 2018/2/5

Y1 - 2018/2/5

N2 - The oxygen fugacity of the upper mantle is 3–4 orders of magnitude higher than that of the lower mantle and this has been attributed to Fe2+ disproportionating into Fe3+ plus Fe0 at pressures > 24 GPa. The upper mantle might therefore have been expected to have evolved to more oxidizing compositions through geological time, but it appears that the oxygen fugacity of the upper mantle has remained constant for the last 3.5 billion years. Thus, it indicates that the mantle has been actively buffered from the accumulation of Fe3+, and that this is linked to oxidation of diamond to carbonate coupled with reduction of Fe3+ to Fe2+. When subducted plates penetrate into the lower mantle, compensational upwelling transports bridgmanite into the transition zone, where it breaks down to ringwoodite and majorite, releasing the ferric iron. The system returns to equilibrium through oxidation of diamond. Early in Earth history, diamond may have been enriched at the base of the transition zone in the Magma Ocean, because it is denser than peridotite melts at depths shallower than 660 km, and it is more buoyant below. Ongoing oxidation of diamond forms carbonate, leading to relatively high carbonate concentrations in the source of ocean island basalts.

AB - The oxygen fugacity of the upper mantle is 3–4 orders of magnitude higher than that of the lower mantle and this has been attributed to Fe2+ disproportionating into Fe3+ plus Fe0 at pressures > 24 GPa. The upper mantle might therefore have been expected to have evolved to more oxidizing compositions through geological time, but it appears that the oxygen fugacity of the upper mantle has remained constant for the last 3.5 billion years. Thus, it indicates that the mantle has been actively buffered from the accumulation of Fe3+, and that this is linked to oxidation of diamond to carbonate coupled with reduction of Fe3+ to Fe2+. When subducted plates penetrate into the lower mantle, compensational upwelling transports bridgmanite into the transition zone, where it breaks down to ringwoodite and majorite, releasing the ferric iron. The system returns to equilibrium through oxidation of diamond. Early in Earth history, diamond may have been enriched at the base of the transition zone in the Magma Ocean, because it is denser than peridotite melts at depths shallower than 660 km, and it is more buoyant below. Ongoing oxidation of diamond forms carbonate, leading to relatively high carbonate concentrations in the source of ocean island basalts.

KW - Carbon cycle

KW - Carbon concentration

KW - Elasticity

KW - First-principles calculations

KW - Earth mantle

U2 - 10.1016/j.chemgeo.2017.08.001

DO - 10.1016/j.chemgeo.2017.08.001

M3 - Article

VL - 478

SP - 69

EP - 75

JO - Chemical Geology

JF - Chemical Geology

SN - 0009-2541

ER -

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