Výsledky vyhledávání - "A. R. Sarafian"

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

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The water and fluorine content of 4 Vesta

Autor: Eve L. Berger, Horst R. Marschall, Kevin Righter, Sune G. Nielsen, Adam R. Sarafian, Glenn A. Gaetani

Publikováno v: Geochimica et Cosmochimica Acta. 266:568-581

The processes that controlled accretion of water and volatiles to the inner solar system remain enigmatic, because it is difficult to determine the absolute concentrations of volatile elements in planetary bodies. In this contribution we study rare u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::45caf8595a57bfa43fd4e2a4e38ec1ce
https://doi.org/10.1016/j.gca.2019.08.023

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Vanadium isotope composition of seawater

Autor: Kuo-Fang Huang, Jurek Blusztajn, Tristan J. Horner, Adam R. Sarafian, Peter L. Morton, Sune G. Nielsen, Indra S. Sen, Fei Wu, Jeremy D. Owens, Tianyi Huang

Publikováno v: Geochimica et Cosmochimica Acta. 244:403-415

The speciation, burial, and isotopic composition of vanadium (V) in seawater is predicted to be closely coupled to the redox state of the oceans. While the speciation and burial terms are reasonably constrained, the V isotopic composition of seawater

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9c08e627a4c95f5755f0483aba467b88
https://doi.org/10.1016/j.gca.2018.10.010

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How do secondary iron enrichments form within basaltic eucrites? An experimental approach

Autor: Stella Rombeck, Christian Vollmer, Julia Roszjar, Adam R. Sarafian, Stephan Klemme, Akira Yamaguchi

Some basaltic eucrites and basaltic lithologies in howardites derived from the asteroid 4 Vesta exhibit unusual secondary veinlet textures consisting mostly of fayalitic olivine and Fe‐enrichments within pyroxenes. Recent studies discussed the form

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6856e3ced9120c83245fdb0cf875c48
http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8760

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Fossil records of early solar irradiation and cosmolocation of the CAI factory: A reappraisal

Autor: Glenn J. MacPherson, Q. R. Shollenberger, Horst R. Marschall, Adam R. Sarafian, Richard von Mutius, Benjamin Jacobsen, Sune G. Nielsen, Maureen E. Auro, Gregory A. Brennecka, Kevin W. Burton, David V. Bekaert, Ming-Chang Liu

Publikováno v: Science Advances, 2021, Vol.7(40), pp.eabg8329 [Peer Reviewed Journal]
Science Advances

Description
CAIs, the oldest solids in the Solar System, probably formed further away from the Sun than previously thought.
Calcium-aluminum–rich inclusions (CAIs) in meteorites carry crucial information about the environmental conditions

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fd35508b5bf72ff4aed0f9749a1145b
https://doi.org/10.1126/sciadv.abg8329

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Highly volatile element (H, C, F, Cl, S) abundances and H isotopic compositions in chondrules from carbonaceous and ordinary chondrites

Autor: Conel M. O'd. Alexander, Steven D. Jacobsen, K. Shimizu, Adam R. Sarafian, Erik H. Hauri, Ruslan A. Mendybaev, Jianhua Wang, Larry R. Nittler

Publikováno v: Goldschmidt2021 abstracts.

The partial pressures and isotopic compositions of volatiles present during chondrule formation can be constrained by the highly volatile element or HVE (H, C, F, Cl, and S) abundances and isotopic compositions in chondrules. Here we present the resu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f58ffd77055f31a8c455380bd0f4cc3
https://doi.org/10.7185/gold2021.4521

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