Startseite Occurrence of tuite and ahrensite in Zagami and their significance for shock-histories recorded in martian meteorites
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Occurrence of tuite and ahrensite in Zagami and their significance for shock-histories recorded in martian meteorites

  • Lixin Gu ORCID logo , Sen Hu , Mahesh Anand , Xu Tang , Jianglong Ji , Bin Zhang , Nian Wang und Yangting Lin
Veröffentlicht/Copyright: 27. Mai 2022
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American Mineralogist
Aus der Zeitschrift American Mineralogist Band 107 Heft 6

Abstract

We report on the discovery of two high-pressure minerals, tuite and ahrensite, located in two small shock-induced melt pockets (SIMP 1 and 2) in the Zagami martian meteorite, coexisting with granular and acicular stishovite and seifertite. Tuite identified in this study has two formation pathways: decomposition of apatite and transformation of merrillite under high-P-T conditions. Chlorine-bearing products, presumably derived from the decomposition of apatite, are concentrated along the grain boundaries of tuite grains. Nanocrystalline ahrensite in the pyroxene clast in SIMP 2 is likely to be a decomposition product of pigeonite under high-P-T conditions by a solid-state transformation mechanism. The pressure and temperature conditions estimated from the high-pressure minerals in the shock-induced melt pockets are ~12–22 GPa and ~1100–1500 °C, respectively, although previous estimates of peak shock pressure are higher. This discrepancy probably represents the shift of kinetic relative to thermodynamic phase boundaries, in particular the comparatively small region that we examine here, rather than a principal disagreement between the peak shock conditions.

Keywords: Tuite; ahrensite; Zagami; martian meteorite; high-pressure minerals

Funding statement: This study was financially supported by the National Natural Science Foundation of China (41973062), China Scholarship Council (201804910284), UK STFC grants to MA (ST/P000657/1 and ST/T000228/1), the key research program of the Institute of Geology and Geophysics, CAS (IGGCAS-201905), Pre-research project on Civil Aerospace Technologies by CNSA (D020201 and D020203), and Beijing Municipal Science and Technology Commission (Z191100004319001).

Acknowledgments

The Zagami section was loaned by the National History Museum in New York. We thank A.E. Oliver Tschauner, reviewer Erin Walton, and another anonymous reviewer for their constructive suggestions and comments to improve the quality of the manuscript.

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Received: 2021-02-17
Accepted: 2021-05-28
Published Online: 2022-05-27
Published in Print: 2022-05-27

© 2022 Mineralogical Society of America

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  12. Hydrothermal troctolite alteration at 300 and 400 °C: Insights from flexible Au-reaction cell batch experimental investigations
  13. Timescales and rates of intrusive and metamorphic processes determined from zircon and garnet in migmatitic granulite, Fiordland, New Zealand
  14. In situ chemical and isotopic analyses and element mapping of multiple-generation pyrite: Evidence of episodic gold mobilization and deposition for the Qiucun epithermal gold deposit in Southeast China
  15. Hydrothermal mineralization of celadonite: Hybridized fluid–basalt interaction in Janggi, Korea
  16. Gungerite, TlAs5Sb4S13, a new thallium sulfosalt with a complex structure containing covalent As-As bonds
  17. Nitscheite, (NH4)2[(UO2)2(SO4)3(H2O)2]·3H2O, a new mineral with an unusual uranyl-sulfate sheet
  18. Protocaseyite, a new decavanadate mineral containing a [Al4(OH)6(H2O)12]6+ linear tetramer, a novel isopolycation
  19. Fission-track etching in apatite: A model and some implications
  20. Hydrothermal monazite trumps rutile: Applying U-Pb geochronology to evaluate complex mineralization ages of the Katbasu Au-Cu deposit, Western Tianshan, Northwest China
  21. Erratum
https://doi.org/10.2138/am-2022-8020
Schlagwörter für diesen Artikel
Tuite; ahrensite; Zagami; martian meteorite; high-pressure minerals

Artikel in diesem Heft

  1. Periodic and non-periodic stacking in molybdenite (MoS2) revealed by STEM
  2. The effect of halogens (F, Cl) on the near-liquidus crystallinity of a hydrous trachyte melt
  3. Occurrence of tuite and ahrensite in Zagami and their significance for shock-histories recorded in martian meteorites
  4. Zolenskyite, FeCr2S4, a new sulfide mineral from the Indarch meteorite
  5. Refined estimation of Li in mica by a machine learning method
  6. Olivine in picrites from continental flood basalt provinces classified using machine learning
  7. The glass transition and the non-Arrhenian viscosity of carbonate melts
  8. Etching of fission tracks in monazite: Further evidence from optical and focused ion beam scanning electron microscopy
  9. The low-temperature shift of antigorite dehydration in the presence of sodium chloride: In situ diffraction study up to 3 GPa and 700 °C
  10. Chemistry-dependent Raman spectral features of glauconite and nontronite: Implications for mineral identification and provenance analysis
  11. Experimental determination of solubility constants of saponite at elevated temperatures in high ionic strength solutions
  12. Hydrothermal troctolite alteration at 300 and 400 °C: Insights from flexible Au-reaction cell batch experimental investigations
  13. Timescales and rates of intrusive and metamorphic processes determined from zircon and garnet in migmatitic granulite, Fiordland, New Zealand
  14. In situ chemical and isotopic analyses and element mapping of multiple-generation pyrite: Evidence of episodic gold mobilization and deposition for the Qiucun epithermal gold deposit in Southeast China
  15. Hydrothermal mineralization of celadonite: Hybridized fluid–basalt interaction in Janggi, Korea
  16. Gungerite, TlAs5Sb4S13, a new thallium sulfosalt with a complex structure containing covalent As-As bonds
  17. Nitscheite, (NH4)2[(UO2)2(SO4)3(H2O)2]·3H2O, a new mineral with an unusual uranyl-sulfate sheet
  18. Protocaseyite, a new decavanadate mineral containing a [Al4(OH)6(H2O)12]6+ linear tetramer, a novel isopolycation
  19. Fission-track etching in apatite: A model and some implications
  20. Hydrothermal monazite trumps rutile: Applying U-Pb geochronology to evaluate complex mineralization ages of the Katbasu Au-Cu deposit, Western Tianshan, Northwest China
  21. Erratum
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Heruntergeladen am 21.9.2025 von https://www.degruyterbrill.com/document/doi/10.2138/am-2022-8020/html?lang=de
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