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Discovery of bridgmanite, the most abundant mineral in Earth, in a shocked meteorite

Tschauner, Oliver and Ma, Chi and Beckett, John R. and Prescher, Clemens and Prakapenka, Vitali B. and Rossman, George R. (2014) Discovery of bridgmanite, the most abundant mineral in Earth, in a shocked meteorite. Science, 346 (6213). pp. 1100-1102. ISSN 0036-8075. doi:10.1126/science.1259369.

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Meteorites exposed to high pressures and temperatures during impact-induced shock often contain minerals whose occurrence and stability normally confine them to the deeper portions of Earth's mantle. One exception has been MgSiO_3 in the perovskite structure, which is the most abundant solid phase in Earth. Here we report the discovery of this important phase as a mineral in the Tenham L6 chondrite and approved by the International Mineralogical Association (specimen IMA 2014-017). MgSiO_3-perovskite is now called bridgmanite. The associated phase assemblage constrains peak shock conditions to ~24 gigapascals and 2300 kelvin. The discovery concludes a half century of efforts to find, identify, and characterize a natural specimen of this important mineral.

Item Type:Article
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URLURL TypeDescription Information
Tschauner, Oliver0000-0003-3364-8906
Ma, Chi0000-0002-1828-7033
Prakapenka, Vitali B.0000-0001-9270-2330
Rossman, George R.0000-0002-4571-6884
Additional Information:©2014 American Association for the Advancement of Science. 30 July 2014; accepted 22 October 2014. The crystallographic information about bridgmanite is available at the Inorganic Crystal Structure Database and American Mineralogist databases and in the supplementary materials. This work was supported by U.W. Department of Energy (DOE) award DESC0006278, NASA grant NNX12AH63G, and NSF grants EAR-1128799, DE-FG02-94ER14466, EAR-0318518, and DMR-0080065. Part of this work was performed at GeoSoilEnviroCARS (Sector 13), Advanced Photon Source, Argonne National Laboratory. GeoSoilEnviroCARS is supported by NSF-EART-1128799 and DE-FG02-94ER14466). The Advanced Photon Source, a DOE Office of Science User Facility, is operated by Argonne National Laboratory under contract no. DE-AC02-06CH11357. We thank reviewers N. Ross and T. Sharp for their helpful comments.
Funding AgencyGrant Number
Department of Energy (DOE)DESC0005278
Department of Energy (DOE)DE-FG02-94ER14466
Department of Energy (DOE)DE-FG02-94ER14466
Department of Energy (DOE)DE-AC02-06CH11357
Issue or Number:6213
Record Number:CaltechAUTHORS:20141126-141558657
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52186
Deposited On:27 Nov 2014 19:28
Last Modified:10 Nov 2021 19:22

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