Hydrothermal jarosite and hematite in a pyroxene-hosted melt inclusion in martian meteorite Miller Range (MIL) 03346: Implications for magmatic-hydrothermal fluids on Mars

McCubbin, F. M.; Tosca, Nicholas J.; Smirnov, Alexander; Nekvasil, H.; Steele, A.; Fries, M.; Lindsley, D. H.

doi:10.1016/j.gca.2009.05.031

Cited by 101 publications

(101 citation statements)

References 55 publications

(71 reference statements)

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“…Substantial evidence has been presented to show that lunar magmas have higher H contents than previously suggested (Saal et al 2008(Saal et al , 2013McCubbin et al 2010bMcCubbin et al , 2010cBoyce et al 2010;Greenwood et al 2011;Hauri et al 2011;Barnes et al 2013Barnes et al , 2014Hui et al 2013;Tartèse et al 2013. Furthermore, recent studies have confirmed the presence of hydrous amphibole and apatite in many martian meteorites (i.e., Watson et al 1994;Leshin 2000;Boctor et al 2003;Greenwood et al 2008;McCubbin et al 2009McCubbin et al , 2010aHallis et al 2012;Gross et al 2013). In fact, recent estimates of H 2 O abundances in the martian interior are similar to estimates of the terrestrial mantle (McCubbin et al 2010aGross et al 2013).…”

Section: Introductionmentioning

confidence: 72%

Volatile abundances of coexisting merrillite and apatite in the martian meteorite Shergotty: Implications for merrillite in hydrous magmas

McCubbin

Shearer

Burger

et al. 2014

American Mineralogist

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Whitlockite and merrillite are two Ca-phosphate minerals found in terrestrial and planetary igneous rocks, sometimes coexisting with apatite. Whitlockite has essential structural hydrogen, and merrillite is devoid of hydrogen. Whitlockite components have yet to be discovered in samples of extraterrestrial merrillite, despite evidence for whitlockite-merrillite solid solution in terrestrial systems. The observation of merrillite in meteoritic and lunar samples has led many to conclude that the magmas from which the merrillite formed were "very dry." However, the Shergotty martian meteorite has been reported to contain both apatite and merrillite, and recently the apatite has been shown to contain substantial OH abundances, up to the equivalent of 8600 ppm H 2 O. In the present study, we determined the abundances of F, Cl, H 2 O, and S in merrillite from Shergotty using secondary ion mass spectrometry (SIMS). We determined that the merrillite in Shergotty was properly identified (i.e., no discernible whitlockite component), and it coexists with OH-rich apatite. The absence of a whitlockite component in Shergotty merrillite and other planetary merrillites may be a consequence of the limited thermal stability of H in whitlockite (stable only at T <1050 °C), which would prohibit merrillite-whitlockite solid-solution at high temperatures. Consequently, the presence of merrillite should not be used as evidence of dry magmatism without a corresponding estimate of the T of crystallization. In fact, if a whitlockite component in extraterrestrial merrillite is discovered, it may indicate formation by or equilibration with hydrothermal or aqueous fluids.

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Section: Introductionmentioning

confidence: 72%

Volatile abundances of coexisting merrillite and apatite in the martian meteorite Shergotty: Implications for merrillite in hydrous magmas

McCubbin

Shearer

Burger

et al. 2014

American Mineralogist

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“…Wanke et al 2001;Clark et al 2005;, as well as in martian meteorites (e.g. Farquhar et al 2000;Greenwood 2000;McCubbin et al 2009), no sulfurous gases have been detected in the martian atmosphere. Recent ground-based spectroscopic observations have placed an upper limit of 0.3 ppb of SO 2 in the current atmosphere (Encrenaz et al 2011a(Encrenaz et al , 2011b.…”

Section: Atmospheric Compositionmentioning

confidence: 99%

The Sample Analysis at Mars Investigation and Instrument Suite

et al. 2012

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The Sample Analysis at Mars (SAM) investigation of the Mars Science Laboratory (MSL) addresses the chemical and isotopic composition of the atmosphere and volatiles extracted from solid samples. The SAM investigation is designed to contribute substantially to the mission goal of quantitatively assessing the habitability of Mars as an essential step in the search for past or present life on Mars. SAM is a 40 kg instrument suite located in the interior of MSL's Curiosity rover. The SAM instruments are a quadrupole mass spectrometer, a tunable laser spectrometer, and a 6-column gas chromatograph all coupled through solid and gas processing systems to provide complementary information on the same samples. The SAM suite is able to measure a suite of light isotopes and to analyze volatiles directly from the atmosphere or thermally released from solid samples. In addition to measurements of simple inorganic compounds and noble gases SAM will conduct a sensitive search for organic compounds with either thermal or chemical extraction from sieved samples delivered by the sample processing system on the Curiosity rover's robotic arm.

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“…Alternatively, apatite structural formulae can be computed based on three (B-site), five (A-site), or eight (total) cations. Cation normalizations for apatite are less common, but have proven very successful for minerals with multivalent substitutions in both cation and anion sites like amphiboles and sulfates (Hawthorne, 1983;Cosca et al, 1991;Hawthorne and Oberti, 2007;McCubbin et al, 2009). The primary assumptions for the cation normalization are: (1) all significant cations present in the mineral have been analyzed or accounted for, (2) there are no structural vacancies in the cation sites in the apatite, (3) the valence states of all the cations are known (specifically for using a cation normalization to determine the anions per formula unit as would typically be the case for apatite).…”

Section: Electron Probe Microanalysis (Epma) Of Apatitementioning

confidence: 99%

Fluorine and chlorine abundances in lunar apatite: Implications for heterogeneous distributions of magmatic volatiles in the lunar interior

McCubbin

Jolliff²,

Nekvasil

et al. 2011

Geochimica et Cosmochimica Acta

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Hydrothermal jarosite and hematite in a pyroxene-hosted melt inclusion in martian meteorite Miller Range (MIL) 03346: Implications for magmatic-hydrothermal fluids on Mars

Cited by 101 publications

References 55 publications

Volatile abundances of coexisting merrillite and apatite in the martian meteorite Shergotty: Implications for merrillite in hydrous magmas

Volatile abundances of coexisting merrillite and apatite in the martian meteorite Shergotty: Implications for merrillite in hydrous magmas

The Sample Analysis at Mars Investigation and Instrument Suite

Fluorine and chlorine abundances in lunar apatite: Implications for heterogeneous distributions of magmatic volatiles in the lunar interior

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