Isotopic and elemental abundances of copper and zinc in lunar samples, Zagami, Pele’s hairs, and a terrestrial basalt

Herzog, G. F.; Moynier, Frédéric; Albarède, Francis; Berezhnoy, A. A.

doi:10.1016/j.gca.2009.05.067

Cited by 151 publications

(108 citation statements)

References 57 publications

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“…By contrast, terrestrial basalts from a variety of magmatic settings show a very narrow range of +0.2 0 < d 66 Zn < +0.60 (Ben Othman et al, 2003Albarède, 2004;Cloquet et al, 2008;Herzog et al, 2009; this study) which suggest that Zn isotopes are homogeneously well distributed within the Earth's mantle, and that igneous processes do not lead to subsequent Zn isotopic fractionation. This may be related to the higher zinc concentrations in terrestrial igneous rocks ([Zn] = 50-100 ppm; Lodders and Fegley, 1998), or a greater homogenation of kilogram-sized terrestrial samples used as standards, but it may also indicate a significant difference in the formation history of the two planetary bodies.…”

Section: Isotopic Variation Within An Individual Meteoritementioning

confidence: 56%

“…At least two replicate analyses were performed for 80% of the samples; 3-6 replicates were performed for the more extreme samples such as PCA 82502. The replicate analyses of the same samples carried out during different analytical sessions define an external reproducibility (±2 sd) of ±0.09& for d 66 Zn and ±0.27& for d 68 Zn (see Moynier et al (2006) and Herzog et al (2009) for extensive discussion of our analytical precision). With respect to the total amount of Zn in the samples, the blank of about 10 ng introduces an error of 0.10& or less, based on a "worst case" contaminant of d 66 Zn = À2.0& added to the smallest Zn content sample (Zn = 290 ng) at a presumed +1.0& (thus the blank is 3.4% or less of the sample).…”

Section: Methodsmentioning

confidence: 99%

“…A Rayleigh evaporation model can be used to further test this hypothesis, using the equation The lunar basalts show Zn fractionation that is largely chondritic, while the soil, which has been substantially gardened by impacts, is isotopically heavy (Moynier et al, 2006;Herzog et al, 2009) (Fig. 2).…”

Section: Chondritic Origin For Vesta and The Origin Of The Elemental mentioning

confidence: 99%

“…Zn isotopic determinations in chondrites and iron meteorites show significantly more variation than is found in terrestrial materials (Luck et al, 2005;Moynier et al, 2007;Barrat et al, 2012), suggesting volatilization processes and core/mantle segregation in their formation. On the Earth and on the Moon, volatization from impact events is the primary cause of Zn isotopic fractionation (Moynier et al, 2006(Moynier et al, , 2010Albarède et al, 2007;Herzog et al, 2009). We have previously used Zn isotope ratios to determine the role of impact-induced volatization in the formation of tektites ) and ureilites (Moynier et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Zinc isotopes in HEDs: Clues to the formation of 4-Vesta, and the unique composition of Pecora Escarpment 82502

Paniello¹,

Moynier²,

Beck

et al. 2012

Geochimica et Cosmochimica Acta

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The d 66 Zn (permil deviation of the 66 Zn/ 64 Zn ratio from a terrestrial standard) values for a suite of 20 non-Antarctic HED (howardite-eucrite-diogenite) meteorites and one mesosiderite, and for eight Antarctic eucrites and diogenites, were measured in order to determine the role of volatization in the formation of their presumed parent body, the asteroid 4-Vesta. The 20 non-Antarctic HEDs had d 66 Zn values that ranged from À2.0& to +1.67&, with a mean value of À0.01 ± 0.39& (2 se); this range likely represents a small-scale heterogeneity due to brecciation induced by multiple impacts. The non-Antarctic eucrites (d 66 Zn = +0.00 ± 0.58& (2 se), n = 12) were isotopically the same as the diogenites (d 66 Zn = À0.31 ± 0.80& (2 se), n = 4), and the howardites (d 66 Zn = +0.26 ± 0.37& (2 se), n = 4). On average, non-Antarctic eucrite falls were isotopically heavier (+0.50&) than non-Antarctic finds (À1.00&). The Antarctic finds studied were all unbrecciated samples, and they were significantly heavier than the non-Antarctic samples with a d 66 Zn range of +1.63& to +6.22& for four eucrites (mean, +4.32&) and +0.94& to +1.60& for three diogenites (mean + 1.23&), excluding one anomalous sample, while their Zn concentration is significantly lower than the brecciated samples. These data suggest that the unbrecciated eucrites probably represent the eucritic crust shortly after differentiation and cooling of the parent asteroid, at which time volatization of lighter zinc isotopes led to an isotopically heavy crust. Early impact events caused the ejection of these unbrecciated meteorites, which were subsequently spared from brecciation caused by multiple additional impacts on the much larger Vesta. The range of d 66 Zn values and Zn concentration for the brecciated HEDs in this study supports a major contribution to the Vestan surface by chondritic impactors (À1.30 < d 66 Zn < +0.76& for ordinary and carbonaceous chondrites). The anomalous eucrite PCA 82502 (d 66 Zn = À7.75&) is significantly isotopically lighter than the other HEDs and is the natural sample with the lightest Zn isotopic composition reported in the solar system to date. This meteorite most likely originated from a distinct parent body.

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Section: Isotopic Variation Within An Individual Meteoritementioning

confidence: 56%

Section: Methodsmentioning

confidence: 99%

Section: Chondritic Origin For Vesta and The Origin Of The Elemental mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Zinc isotopes in HEDs: Clues to the formation of 4-Vesta, and the unique composition of Pecora Escarpment 82502

Paniello¹,

Moynier²,

Beck

et al. 2012

Geochimica et Cosmochimica Acta

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“…These observations can be reconciled by deposition of volatiles (e.g. Zn, S, Cl, F, Pb) occurring upon quenching of the beads within the associated vapour jet that expelled them, reduction of FeO to Fe-rich metal phases at the surface of the glass beads [107] and fractionation of Zn isotopes [71].…”

Section: (D) Local Eruption Processes?mentioning

confidence: 99%

Evaporative fractionation of volatile stable isotopes and their bearing on the origin of the Moon

Day

Moynier

2014

Phil. Trans. R. Soc. A.

108

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The Moon is depleted in volatile elements relative to the Earth and Mars. Low abundances of volatile elements, fractionated stable isotope ratios of S, Cl, K and Zn, high μ ( 238 U/ 204 Pb) and long-term Rb/Sr depletion are distinguishing features of the Moon, relative to the Earth. These geochemical characteristics indicate both inheritance of volatile-depleted materials that formed the Moon and planets and subsequent evaporative loss of volatile elements that occurred during lunar formation and differentiation. Models of volatile loss through localized eruptive degassing are not consistent with the available S, Cl, Zn and K isotopes and abundance data for the Moon. The most probable cause of volatile depletion is global-scale evaporation resulting from a giant impact or a magma ocean phase where inefficient volatile loss during magmatic convection led to the present distribution of volatile elements within mantle and crustal reservoirs. Problems exist for models of planetary volatile depletion following giant impact. Most critically, in this model, the volatile loss requires preferential delivery and retention of late-accreted volatiles to the Earth compared with the Moon. Different proportions of late-accreted mass are computed to explain present-day distributions of volatile and moderately volatile elements (e.g. Pb, Zn; 5 to >10%) relative to highly siderophile elements (approx. 0.5%) for the Earth. Models of early magma ocean phases may be more effective in explaining the volatile loss. Basaltic materials (e.g. eucrites and angrites) from highly differentiated airless asteroids are volatile-depleted, like the Moon, whereas the Earth and Mars have proportionally greater volatile contents. Parent-body size and the existence of early atmospheres are therefore likely to represent fundamental controls on planetary volatile retention or loss.

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The behavior of iron and zinc stable isotopes accompanying the subduction of mafic oceanic crust: A case study from Western Alpine ophiolites

Inglis

Debret

Burton

et al. 2017

Geochem Geophys Geosyst

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Arc lavas display elevated Fe 31 /RFe ratios relative to MORB. One mechanism to explain this is the mobilization and transfer of oxidized or oxidizing components from the subducting slab to the mantle wedge. Here we use iron and zinc isotopes, which are fractionated upon complexation by sulfide, chloride, and carbonate ligands, to remark on the chemistry and oxidation state of fluids released during prograde metamorphism of subducted oceanic crust. We present data for metagabbros and metabasalts from the Chenaillet massif, Queyras complex, and the Zermatt-Saas ophiolite (Western European Alps), which have been metamorphosed at typical subduction zone P-T conditions and preserve their prograde metamorphic history. There is no systematic, detectable fractionation of either Fe or Zn isotopes across metamorphic facies, rather the isotope composition of the eclogites overlaps with published data for MORB. The lack of resolvable Fe isotope fractionation with increasing prograde metamorphism likely reflects the mass balance of the system, and in this scenario Fe mobility is not traceable with Fe isotopes. Given that Zn isotopes are fractionated by S-bearing and C-bearing fluids, this suggests that relatively small amounts of Zn are mobilized from the mafic lithologies in within these types of dehydration fluids. Conversely, metagabbros from the Queyras that are in proximity to metasediments display a significant Fe isotope fractionation. The covariation of d 56 Fe of these samples with selected fluid mobile elements suggests the infiltration of sediment derived fluids with an isotopically light signature during subduction.

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Isotopic and elemental abundances of copper and zinc in lunar samples, Zagami, Pele’s hairs, and a terrestrial basalt

Cited by 151 publications

References 57 publications

Zinc isotopes in HEDs: Clues to the formation of 4-Vesta, and the unique composition of Pecora Escarpment 82502

Zinc isotopes in HEDs: Clues to the formation of 4-Vesta, and the unique composition of Pecora Escarpment 82502

Evaporative fractionation of volatile stable isotopes and their bearing on the origin of the Moon

The behavior of iron and zinc stable isotopes accompanying the subduction of mafic oceanic crust: A case study from Western Alpine ophiolites

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