The brecciated texture of polymict eucrites: Petrographic investigations of unequilibrated meteorites from the Antarctic Yamato collection

Autor: Stella Rombeck, Stephan Klemme, Adam R. Sarafian, Christian Vollmer, J. Roszjar

Publikováno v: Meteoritics & Planetary Science. 55:558-574

We report on the petrography and mineralogy of five Yamato polymict eucrites to better constrain the formation and alteration of crustal material on differentiated asteroids. Each sample consists of different lithic clasts that altogether form four d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2aa5d3b4531402f8f2368d9fa88271af
https://doi.org/10.1111/maps.13453

Decline of giant impacts on Mars by 4.48 billion years ago and an early opportunity for habitability

Autor: Desmond E. Moser, Axel Wittmann, Francis M. McCubbin, David J. Larson, Anthony J. Irving, L. F. White, G. Arcuri, David A. Reinhard, Kimberly T. Tait, I. Barker, J. Roszjar, Connor Davis, James Darling

Publikováno v: Moser, D E, Arcuri, G A, Reinhard, D, White, L F, Darling, J, Barker, I R, Larson, D J, Irving, A J, McCubbin, F M, Tait, K, Roszjar, J, Wittmann, A & Davis, C 2019, ' Decline of giant impacts on Mars by 4.48 billion years ago and an early opportunity for habitability ', Nature Geoscience, vol. 12, no. 7, pp. 522–527 . https://doi.org/10.1038/s41561-019-0380-0

The timing of the wane in heavy meteorite bombardment of the inner planets is debated. Its timing determines the onset of crustal conditions consistently below the thermal and shock pressure limits for microbiota survival, and so bounds the occurrenc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b55fb6b5f407621fa2fd360972d21bb
https://doi.org/10.1038/s41561-019-0380-0

Chlorine and hydrogen degassing in Vesta's magma ocean

Autor: J. Roszjar, Timm John, Martin J. Whitehouse, Adam R. Sarafian

Publikováno v: Earth and Planetary Science Letters. 459:311-319

The hydrophilic nature of halogens makes these elements ideal for probing potential hydrous geologic processes. Generally, in magmatic settings the stable isotopes of Cl may fractionate when H is in low concentrations and little fractionation occurs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::11837f317f52e0fdee337fa3189d9381
https://doi.org/10.1016/j.epsl.2016.10.029

Prolonged magmatism on 4 Vesta inferred from Hf–W analyses of eucrite zircon

Autor: J. Van Orman, Addi Bischoff, Klaus Mezger, Martin J. Whitehouse, J. Roszjar, G. Srinivasan, Erik E. Scherer

Publikováno v: Earth and Planetary Science Letters. 452:216-226

The asteroid 4 Vesta is the second most massive planetesimal in the Solar System and a rare example of a planetary object that possibly can be linked to a specific group of differentiated meteorites, the howardite–eucrite–diogenite suite. The 182

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::88a02c204fae4f435ca12b6802c04434
https://doi.org/10.1016/j.epsl.2016.07.025

Pb evolution in the Martian mantle

Autor: Joshua F. Snape, Jeremy J. Bellucci, Alexander A. Nemchin, J. Roszjar, Martin J. Whitehouse, Phil A. Bland, Gretchen Benedix

The initial Pb compositions of one enriched shergottite, one intermediate shergottite, two depleted shergottites, and Nakhla have been measured by Secondary Ion Mass Spectrometry (SIMS). These values, in addition to data from previous studies using a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6286d533abe1fed2f3bc4179916ef303
http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2992