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Licensed Unlicensed Requires Authentication Published by De Gruyter September 27, 2019

Chenmingite, FeCr2O4 in the CaFe2O4-type structure, a shock-induced, high-pressure mineral in the Tissint martian meteorite

  • Chi Ma EMAIL logo , Oliver Tschauner , John R. Beckett , Yang Liu , Eran Greenberg and Vitali B. Prakapenka
From the journal American Mineralogist

Abstract

Chenmingite (FeCr2O4; IMA 2017-036) is a high-pressure mineral, occurring as micrometer- to submicrometer-sized lamellae within precursor chromite grains along with xieite and Fe,Cr-rich ulvöspinel next to shock-induced melt pockets, from the Tissint martian meteorite. The composition of type chenmingite by electron probe analysis shows an empirical formula of (Fe0.752+Mg0.23Mn0.02)(Cr1.60Al0.29Fe0.063+Fe0.042+Ti0.02)Σ2.01O4.The general and end-member formulas are (Fe,Mg)(Cr,Al)2O4 and FeCr2O4. Synchrotron X‑ray diffraction reveals that chenmingite has an orthorhombic Pnma CaFe2O4-type (CF) structure with unit-cell dimensions: a = 9.715(6) Å, b = 2.87(1) Å, c = 9.49(7) Å, V = 264.6(4) Å3, and Z = 4. Both chenmingite and xieite formed by solid-state transformation of precursor chromite under high pressure and high temperature during the Tissint impact event on Mars. The xieite regions are always in contact with melt pockets, whereas chenmingite lamellae only occur within chromite, a few micrometers away from the melt pockets. This arrangement suggests that chenmingite formed under similar pressures as xieite but at lower temperatures, in agreement with experimental studies.

Acknowledgments and Funding

We thank Ross Angel and four anonymous reviewers for their constructive reviews. SEM, EBSD, and EPMA analyses were carried out at the Caltech GPS Division Analytical Facility, which is supported, in part, by NSF Grants EAR-0318518 and DMR-0080065. O.T. acknowledges support by NSF EAR-1838330. GSECARS is supported through DOE Award DESC0005278, and NSF award EAR-1128799 and -0318518, DE-FG02-94ER14466, and DMR-0080065. The Advanced Photon Source, a DOE Office of Science User Facility is operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.

References cited

Arévalo-Lopez, A.M., Dos santos-García, A.J., Castillo-Martínez, E., Durán, A., and Alario-Franco, M.A. (2010) Spinel to CaFe2O4 transformation: Mechanism and properties of β-CdCr2O4 Inorganic Chemistry, 49, 2827–2833.10.1021/ic902228hSearch in Google Scholar

Armstrong, J.T. (1995) CITZAF: a package of correction programs for the quantitative electron microbeam X‑ray analysis of thick polished materials, thin films, and particles. Microbeam Analysis, 4, 177–200.Search in Google Scholar

Baziotis, I.P., Liu, Y., DeCarli, P.S., Melosh, H.J., McSween, H.Y., Bodnar, R.J., and Taylor, L.A. (2013) The Tissint martian meteorite as evidence for the largest impact excavation. Nature Communications, 4, 1404, DOI:10.1038/ncomms2414, 7 pp.10.1038/ncomms2414Search in Google Scholar

Brenker, F.E., Stachel, T., and Harris, J.W. (2002) Exhumation of lower mantle inclusions in diamond: ATEM investigation of retrograde phase transitions, reactions and exsolution. Earth and Planetary Science Letters, 198, 1–9.10.1016/S0012-821X(02)00514-9Search in Google Scholar

Chen, M., Shu, J., Mao, H.-K., Xie, X., and Hemley, R.J. (2003a) Natural occurrence and synthesis of two new postspinel polymorphs of chromite. Proceedings of the National Academy of Sciences, 100, 14651–14654.10.1073/pnas.2136599100Search in Google Scholar

Chen, M., Shu, J., Xie, X., and Mao, H.-K. (2003b) Natural CaTi2O4-structured FeCr2O4 polymorph in the Suizhou meteorite and its significance in mantle mineralogy. Geochimica et Cosmochimica Acta, 67, 3937–3942.10.1016/S0016-7037(03)00175-3Search in Google Scholar

Chen, M., Shu, J., and Mao, H.-K. (2008) Xieite, a new mineral of high-pressure FeCr2O4 polymorph. Chinese Science Bulletin, 53, 3341–3345.10.1007/s11434-008-0407-1Search in Google Scholar

Dera, P., Zhuravlev, K., Prakapenka, V., Rivers, M.L., Finkelstein, G.J., Grubor-Urosevic, O., Tschauner, O., Clark, S.M., and Downs, R.T. (2013) High pressure single-crystal micro X‑ray diffraction analysis with GSE_ADA/RSV software. High Pressure Research, 33, Special Issue (SI), 466–484.10.1080/08957959.2013.806504Search in Google Scholar

Irifune, T., Fujino, K., and Ohtani, E. (1991) A new high-pressure form of MgAl2O4 Nature, 349, 409–411.10.1038/349409a0Search in Google Scholar

Ishii, T., Kojitani, H., Tsukamoto, S., Fujino, K., Mori, D., Inaguma, Y., Tsujino, N., Yoshino, T., Yamazaki, D., Higo, Y., Funakoshi, K., and Akaogi, M. (2014) High-pressure phase transitions in FeCr2O4 and structure analysis of new post-spinel FeCr2O4 and Fe2Cr2O5 phases with meteoritical and petrological implications. American Mineralogist, 99, 1788–1797.10.2138/am.2014.4736Search in Google Scholar

Ishii, T., Kojitani, H., Fujino, K., Yusa,H., Mori, D., Inaguma,Y., Matsushita, Y., Yamaura, K., and Akaogi, M. (2015) High-pressure high-temperature transitions in MgCr2O4 and crystal structures of new Mg2Cr2O5 and post-spinel MgCr2O4 phases with implications for ultrahigh-pressure chromitites in ophiolites. American Mineralogist, 100, 59–65.10.2138/am-2015-4818Search in Google Scholar

Ishii, T., Sakai, T., Kojitani, H., Mori, D., Inaguma, Y., Matsushita, Y., Yamaura, K., and Akaogi, M. (2018) High-pressure phase relations and crystal structures of postspinel phases in MgV2O4 FeV2O4 and MnCr2O4 Crystal chemistry of AB2O4 postspinel compounds. Inorganic Chemistry, 57, 6648–6657.10.1021/acs.inorgchem.8b00810Search in Google Scholar PubMed

Kessel, R., Schmidt, M.W., Ulmer, P., and Pettke, T. (2005) Trace element signature of subduction-zone fluids, melts and supercritical liquids at 120–180 km depth. Nature, 437, 724–727.10.1038/nature03971Search in Google Scholar PubMed

Kojitani, H., Hisatomi, R., and Akaogi, M. (2007) High-pressure phase relations and crystal chemistry of calcium ferrite-type solid solutions in the system MgAl2O4-Mg2SiO4 American Mineralogist, 92, 1112–1118.10.2138/am.2007.2255Search in Google Scholar

Kraus, W., and Nolze, G. (1996) PowderCell—a program for the representation and manipulation of crystal structures and calculation of the resulting X‑ray powder patterns. Journal of Applied Crystallography, 29, 301–303.10.1107/S0021889895014920Search in Google Scholar

Lazíc, B., Kahlenberg, V., Konzett, J., and Kaindl, R. (2006) On the polymorphism of CaAl2O4-structural investigations of two high pressure modifications. Solid State Sciences, 8, 589–597.10.1002/chin.200636005Search in Google Scholar

Ma, C. (2018) A closer look at shocked meteorites: Discovery of new high-pressure minerals. American Mineralogist, 103, 1521–1522.10.2138/am-2018-6710Search in Google Scholar

Ma, C., and Tschauner, O. (2017) Chenmingite, IMA 2017-036. CNMNC Newsletter No. 38, August 2017, page 1037; Mineralogical Magazine, 81, 1033–1038.Search in Google Scholar

Ma, C., Tschauner, O., Beckett, J.R., Liu, Y., Rossman, G.R., Zhuravlev, K., Prakapenka, V., Dera, P., and Taylor, L.A. (2015) Tissintite, (Ca,Na,⎕)Al-Si2O6 a highly-defective, shock-induced, high-pressure clinopyroxene in the Tissint martian meteorite. Earth and Planetary Science Letters, 422, 194–205.10.1016/j.epsl.2015.03.057Search in Google Scholar

Ma, C., Tschauner, O., Beckett, J.R., Liu, Y., Rossman, G.R., Sinogeikin, S.V., Smith, J.S., and Taylor, L.A. (2016) Ahrensite, γ-Fe2SiO4 a new shock-metamorphic mineral from the Tissint meteorite: implications for the Tissint shock event on Mars. Geochimica et Cosmochimica Acta, 184, 240–256.10.1016/j.gca.2016.04.042Search in Google Scholar

Ma, C., Tschauner, O., Beckett, J.R., and Liu, Y. (2018) Discovery of chenmingite, FeCr2O4 with an orthorhombic CaFe2O4-type structure, a shock-induced high-pressure mineral in the Tissint martian meteorite. 49th Lunar and Planetary Science Conference, Abstract 1564.Search in Google Scholar

Ono, S., Kikegawa, T., and Ohishi, Y. (2006) The stability and compressibility of MgAl2O4 high-pressure polymorphs. Physics and Chemistry of Minerals, 33, 200–206.10.1007/s00269-006-0068-zSearch in Google Scholar

Prescher, C., and Prakapenka, V.B. (2015) DIOPTAS: a program for reduction of two-dimensional X‑ray diffraction data and data exploration. High Pressure Research, 35, 223–230.10.1080/08957959.2015.1059835Search in Google Scholar

Tschauner, O., Ma, C., Beckett, J.R., Prescher, C., Prakapenka, V.B., and Rossman, G.R. (2014) Discovery of bridgmanite, the most abundant mineral in the Earth, in a shocked meteorite. Science, 346, 1100–1102.10.1126/science.1259369Search in Google Scholar PubMed

Tschauner, O., Huang, S., Greenberg, E., Prakapenka, V.B., Ma, C., Rossman, G.R., Shen, A.H., Zhang, D., Newville, M., Lanzirotti, A., and Tait, K. (2018) Ice-VII inclusions in diamonds: Evidence for aqueous fluid in the Earth’s deep mantle. Science, 359, 1136–1139.10.1126/science.aao3030Search in Google Scholar PubMed

von Dreele, R.B., and Larson, A.C. (2004) General Structure Analysis System (GSAS). Los Alamos National Laboratory Report LAUR, New Mexico.Search in Google Scholar

Walton, E.L., Sharp, T.G., Hu, J., and Filiberto, J. (2014) Heterogeneous mineral assemblages in martian meteorite Tissint as a result of a recent small impact event on Mars. Geochimica et Cosmochimica Acta, 140, 334–348.10.1016/j.gca.2014.05.023Search in Google Scholar

Received: 2019-02-14
Accepted: 2019-07-06
Published Online: 2019-09-27
Published in Print: 2019-10-25

© 2019 Walter de Gruyter GmbH, Berlin/Boston

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