Iron oxidation state in serpentines and magnesian chlorites of subduction-related rocks by B. Reynard, C. Fellah, C. McCammon

“…Photo-oxidation is less important in Fe-poor phyllosilicates of the mica and talc families and does not affect the Fe-rich serpentines (greenalite, cronstedtite) of meteorites or Fe-rich terrestrial phyllosilicates. Mössbauer Fe<span class="inline-formula">³⁺</span> <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mo>/</mo></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="8pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="93e47eb16cb371fe6916d3191efc4f1d"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-34-645-2022-ie00002.svg" width="8pt" height="14pt" src="ejm-34-645-2022-ie00002.png"/></svg:svg></span></span> Fe<span class="inline-formula">_total</span> ratios of serpentine confirm the occurrence of a major redox change at the lizardite–antigorite transition near 300–400 <span class="inline-formula">^∘</span>C rather than at the dehydration of antigorite at 500–650 <span class="inline-formula">^∘</span>C in serpentinites from high-pressure ophiolites.…”
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An experimental study into the behaviour of sulfur during Martian differentiation by Nash, W

“…REE profiles generated by a simple partial melting model demonstrate the complexity of Martian meteorites’ petrogenesis, including the need for chemically separate reservoirs within Mars’ mantle.…”

MASS-TRANSFER OF XENON THROUGH A STEADY-STATE UPPER-MANTLE by Porcelli, D, Wasserburg, G

“…Consideration of the production and transport equations yields the following conclusions: (1) radiogenic 136Xe in the lower mantle is dominantly from spontaneous fission of Pu; (2) radiogenic 136Xe in the upper mantle is composed of radiogenic 136Xe from the lower mantle substantially augmented by spontaneous fission of U in the upper mantle; (3) the concentration of Xe in the lower mantle is &lt; 10-2 that of carbonaceous chondrites; (4) radiogenic 129Xe is stored in the lower mantle, and the 129Xe excesses seen in the upper mantle are due to mass transfer of Xe from the lower mantle to the upper mantle; (5) the residence time of Xe and He in the upper mantle is ∼1.4 Ga; (6) a substantial portion of nonradiogenic Xe in the upper mantle may be accounted for by subduction of atmospheric Xe; (7) if a large fraction of the total Xe in the upper mantle is subducted atmospheric Xe, then the lower mantle 129Xe 130Xe and 136Xe 130Xe ratios Xe must be large; and (8) the ratio of radiogenic 129Xe to 127I in the lower mantle is about 10-2 times that seen in meteorites. This indicates that Xe was lost from the Earth ∼-108 years after solar system formation. …”

Observations of “fresh” and weathered surfaces on asteroid pairs and their implications on the rotational-fission mechanism by Polishook, David, Moskovitz, Nicholas, Binzel, Richard P., DeMeo, Francesca E., Vokrouhlický, David, Žižka, Jindřich, Oszkiewicz, Dagmara

“…However, our sample includes “old” pairs (2 × 106 ⩾ age ⩾ 1 × 106 years) that present relatively low, meteoritic-like spectral slopes (<0.2% per μm). This illustrates a timescale of at least ∼2 myr before an object develops high spectral slope that is typical for S-type asteroids. …”
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Enhancements of the refractory submicron aerosol fraction in the Arctic polar vortex: feature or exception? by R. Weigel, C. M. Volk, K. Kandler, E. Hösen, G. Günther, B. Vogel, J.-U. Grooß, S. Khaykin, G. V. Belyaev, S. Borrmann

“…This estimate is compared with the expected atmospheric influx of meteoritic material (110 ± 55 × 10³ kg per day). …”
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The naked planet Earth: Most essential pre-requisite for the origin and evolution of life by S. Maruyama, M. Ikoma, H. Genda, K. Hirose, T. Yokoyama, M. Santosh

“…Late bombardment from asteroid belt supplied water to make 3–5 km thick ocean, and not from icy meteorites from Kuiper belt beyond cool Jupiter. It was essential to meet the above conditions that enabled the Earth as a habitable planet with evolved life forms. …”
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Mineralogy, geochemistry, fluid inclusions and genesis of Fe-Cu-Au mineralization associated with Ahmadabad intrusions, Semnan by Fariba Tayefi, Behzad Mehrabi, Majid Ghasemi Siani

“…On the basis of mineralogical and microthermometric studies of fluid inclusions, the mineralizing fluid was possibly of magmatic origin; cooled and diluted by mixing with meteoritic fluids. Temperature and pressure drop following the migration of the magmatic fluid to the shallow depths may changes the nature of mineralizing fluids from reduced to oxidant state and deposition of iron as hematite after sulfide (pyrite and chalcopyrite) and sulfate (barite) precipitation. …”
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De l’agglomération antique de Cassinomagus au village de Chassenon (Charente) : un bilan des connaissances by Lucie Carpentier, Sandra Sicard

“…And a series of gravel structures, composed of the local substratum, a rock of meteoritic origin were discovered on the southern plateau. …”
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The RADIOSTAR Project by Maria Lugaro, Benoit Côté, Marco Pignatari, Andrés Yagüe López, Hannah Brinkman, Borbála Cseh, Jacqueline Den Hartogh, Carolyn Louise Doherty, Amanda Irene Karakas, Chiaki Kobayashi, Thomas Lawson, Mária Pető, Benjámin Soós, Thomas Trueman, Blanka Világos

“…Radioactive nuclei are the key to understanding the circumstances of the birth of our Sun because meteoritic analysis has proven that many of them were present at that time. …”
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The potential science and engineering value of samples delivered to Earth by Mars sample return by Beaty, DW, Grady, MM, McSween, HY, Sefton-Nash, E, Carrier, BL, Altieri, F, Amelin, Y, Ammannito, E, Anand, M, Benning, LG, Bishop, JL, Borg, LE, Boucher, D, Brucato, JR, Busemann, H, Campbell, KA, Czaja, AD, Debaille, V, Marais, DJ, Dixon, M, Ehlmann, BL, Farmer, JD, Fernandez-Remolar, DC, Filiberto, J, Fogarty, J, Glavin, DP, Goreva, YS, Hallis, LJ, Harrington, AD, Hausrath, EM, Herd, CDK, Horgan, B, Humayun, M, Kleine, T, Kleinhenz, J, Mackelprang, R, Mangold, N, Mayhew, LE, McCoy, JT, McCubbin, FM, McLennan, SM, Moser, DE, Moynier, F, Mustard, JF, Niles, PB, Ori, GG, Raulin, F, Rettberg, P, Rucker, MA, Schmitz, N, Schwenzer, SP, Sephton, MA, Shaheen, R, Sharp, ZD, Shuster, DL, Siljeström, S, Smith, CL, Spry, JA, Steele, A, Swindle, TD, Kate, IL, Tosca, NJ, Usui, T, Van Kranendonk, MJ, Wadhwa, M, Weiss, BP, Werner, SC, Westall, F, Wheeler, RM, Zipfel, J, Zorzano, MP

“…© The Meteoritical Society, 2019. Executive Summary: Return of samples from the surface of Mars has been a goal of the international Mars science community for many years. …”