Discovery of the first natural hydride

Luca Bindi, Fernando Camara, Willlliam L. Griffin, Jin-Xiang Huang, Sarah E. M. Gain, Vered Toledo, Suzanne Y. O'Reilly

Research output: Contribution to journalArticle

Abstract

Although hydrogen is the most abundant element in the solar system, the mechanisms of exchange of this element between the deep interior and surface of Earth are still uncertain. Hydrogen has profound effects on properties and processes on microscopic-to-global scales. Here we report the discovery of the first hydride (VH2) ever reported in nature. This phase has been found in the ejecta of Cretaceous pyroclastic volcanoes on Mt Carmel, N. Israel, which include abundant xenoliths containing highly reduced mineral assemblages. These xenoliths were sampled by their host magmas at different stages of their evolution but are not genetically related to them. The xenoliths are interpreted as the products of extended interaction between originally mafic magmas and CH4+H-2 fluids, derived from a deeper, metal-saturated mantle. The last stages of melt evolution are recorded by coarse-grained aggregates of hibonite (CaAl12O19) + grossite (CaAl4O7) + V-rich spinels +/- spheroidal to dendritic inclusions of metallic vanadium (V0), apparently trapped as immiscible metallic melts. The presence of V-0 implies low oxygen fugacities and suggests crystallization of the aggregates in a hydrogen-rich atmosphere. The presence of such reducing conditions in the upper mantle has major implications for the transport of carbon, hydrogen and other volatile species from the deep mantle to the surface.

Original languageEnglish
Pages (from-to)611-614
Number of pages4
JournalAmerican Mineralogist
Volume104
Issue number4
DOIs
Publication statusPublished - Apr 2019

Cite this

Bindi, L., Camara, F., Griffin, W. L., Huang, J-X., Gain, S. E. M., Toledo, V., & O'Reilly, S. Y. (2019). Discovery of the first natural hydride. American Mineralogist, 104(4), 611-614. https://doi.org/10.2138/am-2019-6949
Bindi, Luca ; Camara, Fernando ; Griffin, Willlliam L. ; Huang, Jin-Xiang ; Gain, Sarah E. M. ; Toledo, Vered ; O'Reilly, Suzanne Y. / Discovery of the first natural hydride. In: American Mineralogist. 2019 ; Vol. 104, No. 4. pp. 611-614.
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Bindi, L, Camara, F, Griffin, WL, Huang, J-X, Gain, SEM, Toledo, V & O'Reilly, SY 2019, 'Discovery of the first natural hydride' American Mineralogist, vol. 104, no. 4, pp. 611-614. https://doi.org/10.2138/am-2019-6949

Discovery of the first natural hydride. / Bindi, Luca; Camara, Fernando; Griffin, Willlliam L.; Huang, Jin-Xiang; Gain, Sarah E. M.; Toledo, Vered; O'Reilly, Suzanne Y.

In: American Mineralogist, Vol. 104, No. 4, 04.2019, p. 611-614.

Research output: Contribution to journalArticle

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AU - Bindi, Luca

AU - Camara, Fernando

AU - Griffin, Willlliam L.

AU - Huang, Jin-Xiang

AU - Gain, Sarah E. M.

AU - Toledo, Vered

AU - O'Reilly, Suzanne Y.

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KW - EARTHS

KW - MANTLE

KW - DIAMONDS

KW - BENEATH

KW - STATE

KW - WATER

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DO - 10.2138/am-2019-6949

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JO - American Mineralogist

JF - American Mineralogist

SN - 0003-004X

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Bindi L, Camara F, Griffin WL, Huang J-X, Gain SEM, Toledo V et al. Discovery of the first natural hydride. American Mineralogist. 2019 Apr;104(4):611-614. https://doi.org/10.2138/am-2019-6949