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Preferential localized thinning of lithospheric mantle in the melt-poor Malawi Rift 期刊论文
NATURE GEOSCIENCE, 2020
作者:  Hopper, Emily;  Gaherty, James B.;  Shillington, Donna J.;  Accardo, Natalie J.;  Nyblade, Andrew A.;  Holtzman, Benjamin K.;  Havlin, Christopher;  Scholz, Christopher A.;  Chindandali, Patrick R. N.;  Ferdinand, Richard W.;  Mulibo, Gabriel D.;  Mbogoni, Gabriel
收藏  |  浏览/下载：7/0  |  提交时间：2020/08/09
Distinct formation history for deep-mantle domains reflected in geochemical differences 期刊论文
NATURE GEOSCIENCE, 2020, 13 (7) : 511-+
作者:  Doucet, Luc S.;  Li, Zheng-Xiang;  Gamal El Dien, Hamed;  Pourteau, Amaury;  Murphy, J. Brendan;  Collins, William J.;  Mattielli, Nadine;  Olierook, Hugo K. H.;  Spencer, Christopher J.;  Mitchell, Ross N.
收藏  |  浏览/下载：6/0  |  提交时间：2020/07/06
Identification of chondritic krypton and xenon in Yellowstone gases and the timing of terrestrial volatile accretion 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (25) : 13997-14004
作者:  Broadley, Michael W.;  Barry, Peter H.;  Bekaert, David V.;  Byrne, David J.;  Caracausi, Antonio;  Ballentine, Christopher J.;  Marty, Bernard
收藏  |  浏览/下载：9/0  |  提交时间：2020/06/16
origin of Earth'  s volatiles  accretion  mantle plume  noble gases  Yellowstone  
Hydrothermal (NN)-N-15-N-15 abundances constrain the origins of mantle nitrogen 期刊论文
NATURE, 2020, 580 (7803) : 367-+
作者:  Zhao, Steven;  Jang, Cholsoon;  Liu, Joyce;  Uehara, Kahealani;  Gilbert, Michael;  Izzo, Luke;  Zeng, Xianfeng;  Trefely, Sophie;  Fernandez, Sully;  Carrer, Alessandro;  Miller, Katelyn D.;  Schug, Zachary T.;  Snyder, Nathaniel W.;  Gade, Terence P.;  Titchenell, Paul M.;  Rabinowitz, Joshua D.;  Wellen, Kathryn E.
收藏  |  浏览/下载：14/0  |  提交时间：2020/05/13

Nitrogen is the main constituent of the Earth'  s atmosphere, but its provenance in the Earth'  s mantle remains uncertain. The relative contribution of primordial nitrogen inherited during the Earth'  s accretion versus that subducted from the Earth'  s surface is unclear(1-6). Here we show that the mantle may have retained remnants of such primordial nitrogen. We use the rare (NN)-N-15-N-15 isotopologue of N-2 as a new tracer of air contamination in volcanic gas effusions. By constraining air contamination in gases from Iceland, Eifel (Germany) and Yellowstone (USA), we derive estimates of mantle delta N-15 (the fractional difference in N-15/N-14 from air), N-2/Ar-36 and N-2/He-3. Our results show that negative delta N-15 values observed in gases, previously regarded as indicating a mantle origin for nitrogen(7-10), in fact represent dominantly air-derived N-2 that experienced N-15/N-14 fractionation in hydrothermal systems. Using two-component mixing models to correct for this effect, the (NN)-N-15-N-15 data allow extrapolations that characterize mantle endmember delta N-15, N-2/Ar-36 and N-2/He-3 values. We show that the Eifel region has slightly increased delta N-15 and N-2/Ar-36 values relative to estimates for the convective mantle provided by mid-ocean-ridge basalts(11), consistent with subducted nitrogen being added to the mantle source. In contrast, we find that whereas the Yellowstone plume has delta N-15 values substantially greater than that of the convective mantle, resembling surface components(12-15), its N-2/Ar-36 and N-2/He-3 ratios are indistinguishable from those of the convective mantle. This observation raises the possibility that the plume hosts a primordial component. We provide a test of the subduction hypothesis with a two-box model, describing the evolution of mantle and surface nitrogen through geological time. We show that the effect of subduction on the deep nitrogen cycle may be less important than has been suggested by previous investigations. We propose instead that high mid-ocean-ridge basalt and plume delta N-15 values may both be dominantly primordial features.


  
Large-scale flow of Indian Ocean asthenosphere driven by Reunion plume 期刊论文
NATURE GEOSCIENCE, 2019, 12 (12) : 1043-+
作者:  Barruol, G.;  Sigloch, K.;  Scholz, J. -R.;  Mazzullo, A.;  Stutzmann, E.;  Montagner, J. -P.;  Kiselev, S.;  Fontaine, F. R.;  Michon, L.;  Deplus, C.;  Dyment, J.
收藏  |  浏览/下载：6/0  |  提交时间：2020/02/16
Palaeoarchaean deep mantle heterogeneity recorded by enriched plume remnants 期刊论文
NATURE GEOSCIENCE, 2019, 12 (8) : 672-678
作者:  Wang, Chao;  Song, Shuguang;  Wei, Chunjing;  Su, Li;  Allen, Mark B.;  Niu, Yaoling;  Li, Xian-Hua;  Dong, Jinlong
收藏  |  浏览/下载：10/0  |  提交时间：2019/11/27
Widespread volcanism in the Greenland-North Atlantic region explained by the Iceland plume 期刊论文
NATURE GEOSCIENCE, 2019, 12 (1) : 61-+
作者:  Steinberger, Bernhard;  Bredow, Eva;  Lebedev, Sergei;  Schaeffer, Andrew;  Torsvik, Trond H.
收藏  |  浏览/下载：2/0  |  提交时间：2019/04/09
Anomalous mantle transition zone beneath the Yellowstone hotspot track 期刊论文
NATURE GEOSCIENCE, 2018, 11 (6) : 449-+
作者:  Zhou, Ying
收藏  |  浏览/下载：0/0  |  提交时间：2019/04/09
Indian Ocean floor deformation induced by the Reunion plume rather than the Tibetan Plateau 期刊论文
NATURE GEOSCIENCE, 2018, 11 (5) : 362-+
作者:  Iaffaldano, G.;  Davies, D. R.;  DeMets, C.
收藏  |  浏览/下载：7/0  |  提交时间：2019/04/09
Western US volcanism due to intruding oceanic mantle driven by ancient Farallon slabs 期刊论文
NATURE GEOSCIENCE, 2018, 11 (1) : 70-+
作者:  Zhou, Quan;  Liu, Lijun;  Hu, Jiashun
收藏  |  浏览/下载：4/0  |  提交时间：2019/04/09