Making tissintite: Mimicking meteorites in the multi-anvil

Rucks, Melinda J.; Whitaker, M. L.; Glotch, T. D.; Parise, John B.; Jaret, S. J.; Catalano, Tristan; Dyar, M. D.

doi:10.2138/am-2018-6539

Cited by 13 publications

(22 citation statements)

References 16 publications

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“…Recently, tissintite has been synthesized with starting material of natural labradorite (Rucks et al. ). Rucks et al.…”

Section: Discussionmentioning

confidence: 99%

“…Rucks et al. ). The small pyroxene grains in plagioclase glasses and early crystallized vacancy‐rich clinopyroxene grains in shock‐induced melt veins might have provided crystalline seeds for nucleation of tissintite.…”

Section: Discussionmentioning

confidence: 99%

“…Although tissintite has been observed in a few shocked Martian meteorites and eucrite meteorites, it was only synthesized in a recent shock experiment (Rucks et al. ). With starting material composition An 60 , Rucks et al.…”

Section: Discussionmentioning

confidence: 99%

“…With starting material composition An 60 , Rucks et al. () has synthesized tissintite at 6–8.5 GPa and 1000–1350 °C. In NWA 2650, the shock pressure for the formation of tissintite might be similar to this pressure range, although a relatively lower pressure would be high enough for the stability of tissintite.…”

Section: Discussionmentioning

confidence: 99%

“…; Rucks et al. ; Sims et al. ) and the observations of different plagioclase polymorphs in shocked samples have improved our understanding of the phase transformation behaviors, mechanisms, and conditions of anorthitic plagioclase.…”

Section: Introductionmentioning

confidence: 99%

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Shock‐induced phase transformation of anorthitic plagioclase in the eucrite meteorite Northwest Africa 2650

Chen

Zhang

Pang

et al. 2019

Meteorit & Planetary Scien

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Anorthite is an important constituent mineral in basaltic achondrites from small celestial bodies. Its high‐pressure phase transformation in shocked meteorites has not been systematically studied. In this study, we report the diverse phase transformation behaviors of anorthite in a shocked eucrite Northwest Africa (NWA) 2650, which also contains coesite, stishovite, vacancy‐rich clinopyroxene, super‐silicic garnet, and reidite. Anorthite in NWA 2650 has transformed into anorthite glass (anorthite glassy vein, maskelynite, and glass with a schlieren texture and vesicles), tissintite and dissociated into three‐phase assemblage grossular + kyanite + silica glass. Different occurrences of anorthite glass might have formed via the mechanism involving shear melting, solid‐state transformation, and postshock thermally melting, respectively. Tissintite could have crystallized from a high‐pressure plagioclase melt. The nucleation of tissintite might be facilitated by relict pyroxene fragments and the early formed vacancy‐rich clinopyroxene. The three‐phase assemblage grossular, kyanite, and silica glass should have formed from anorthitic melt at high‐pressure and high‐temperature conditions. The presence of maskelynite and reidite probably suggests a minimum peak shock pressure up to 20 GPa, while the other high‐pressure phases indicate that the shock pressure during the crystallization of shock melt veins might vary from >8 GPa to >2 GPa with a heterogeneous temperature distribution.

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“…Recently, tissintite has been synthesized with starting material of natural labradorite (Rucks et al. ). Rucks et al.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shock‐induced phase transformation of anorthitic plagioclase in the eucrite meteorite Northwest Africa 2650

Chen

Zhang

Pang

et al. 2019

Meteorit & Planetary Scien

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Unconventional high-pressure Raman spectroscopy study of kinetic and peak pressure effects in plagioclase feldspars

et al. 2020

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We present the results of a high-pressure semi-hydrostatic study of two plagioclase minerals, andesine and albite, using diamond anvil cells (DACs) to characterize in situ variations in Raman spectra under different static pressures. In this work, we also examined the kinetic effects on deformation at both long and short timescales through non-traditional experiments in which the DAC was either dropped or struck with a mallet. We examined the effects of strain rate, quench rate, and pressure duration on the Raman spectra of plagioclase. We observed that amorphization occurred in all the plagioclase samples we analyzed, and that amorphization onset and permanence differ depending on the composition, kinetics, energy input, and peak pressure. In andesine, samples pressurized above a peak pressure of 18 GPa, amorphization is permanent. Below this critical pressure, the phase has 'memory', and crystalline andesine reforms on decompression. Our findings suggest the presence of a thermodynamic energy well in andesine around 18 GPa, and we show that any additional energy input while close to 18 GPa results in amorphization becoming permanent. The effect of the energy well may be relevant for longer duration impacts. For such impacts, equilibrium state studies of deformation and phase formation were previously considered to be applicable. These experiments illuminating the presence of memory effects in plagioclase have implications for comparing static compression, in which samples are measured while under compression, with shock compression, for which samples are measured after decompression.Physics and Chemistry of Minerals (2020) 47:12Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Unique mineral assemblages of shock-induced titanium-rich melt pockets in eucrite Northwest Africa 8003

et al. 2019

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Making tissintite: Mimicking meteorites in the multi-anvil

Cited by 13 publications

References 16 publications

Shock‐induced phase transformation of anorthitic plagioclase in the eucrite meteorite Northwest Africa 2650

Shock‐induced phase transformation of anorthitic plagioclase in the eucrite meteorite Northwest Africa 2650

Unconventional high-pressure Raman spectroscopy study of kinetic and peak pressure effects in plagioclase feldspars

Unique mineral assemblages of shock-induced titanium-rich melt pockets in eucrite Northwest Africa 8003

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