Shock-transformation of whitlockite to merrillite and the implications for meteoritic phosphate

Adcock, C. T.; Tschauner, O.; Hausrath, E. M.; Udry, A.; Luo, S. N.; Cai, Y.; Ren, M.; Lanzirotti, A.; Newville, M.; Kunz, M.; Lin, C.

doi:10.1038/ncomms14667

Shock-transformation of whitlockite to merrillite and the implications for meteoritic phosphate

Journal Article · Sun Mar 05 23:00:00 EST 2017 · Nature Communications

DOI:https://doi.org/10.1038/ncomms14667· OSTI ID:1379764

Adcock, C. T. ^[1]; Tschauner, O. ^[2]; Hausrath, E. M. ^[1]; Udry, A. ^[1]; Luo, S. N. ^[3]; Cai, Y. ^[4]; Ren, M. ^[1]; Lanzirotti, A. ^[5]; Newville, M. ^[5]; Kunz, M. ^[6]; Lin, C. ^[7]

Univ. of Nevada, Las Vegas, NV (United States). Dept. of Geoscience
Univ. of Nevada, Las Vegas, NV (United States). Dept. of Geoscience, High Pressure Science and Engineering Center, Galilee Inst.; Southwest Jiaotong Univ., Chengdu (China). Key Lab. of Advanced Technologies of Materials
Southwest Jiaotong Univ., Chengdu (China). Key Lab. of Advanced Technologies of Materials; The Peace Inst. of Multiscale Sciences, Chengdu (China)
The Peace Inst. of Multiscale Sciences, Chengdu (China); Univ. of Science and Technology of China, Hefei (China). Dept. of Modern Mechanics
Univ. of Chicago, IL (United States). GeoScienceEnviro Center for Advanced Radiation Sources
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
Carnegie Inst. of Washington, Argonne, IL (United States). High Pressure Collaborative Access Team (HPCAT)

Meteorites represent the only samples available for study on Earth of a number of planetary bodies. The minerals within meteorites therefore hold the key to addressing numerous questions about our solar system. Of particular interest is the Ca-phosphate mineral merrillite, the anhydrous end-member of the merrillite-whitlockite solid solution series. For example, the anhydrous nature of merrillite in Martian meteorites has been interpreted as evidence of water-limited late-stage Martian melts. However, recent research on apatite in the same meteorites suggests higher water content in melts. One complication of using meteorites rather than direct samples is the shock compression all meteorites have experienced, which can alter meteorite mineralogy. Here we show whitlockite transformation into merrillite by shock-compression levels relevant to meteorites, including Martian meteorites. The results open the possibility that at least part of meteoritic merrillite may have originally been H ⁺ -bearing whitlockite with implications for interpreting meteorites and the need for future sample return.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231; NA0001982; FG02-94ER14466; FG02-99ER45775; AC02-06CH11357

OSTI ID:: 1379764

Alternate ID(s):: OSTI ID: 1347783

Journal Information:: Nature Communications, Journal Name: Nature Communications Vol. 8; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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