Minor and Trace Elements in Meteoritic Minerals

Mason, Brian; Graham, A. L.

doi:10.5479/si.00810274.3.1

Cited by 77 publications

(69 citation statements)

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“…Trace element analyses in meteoritic minerals are used as a guide to which major minerals may serve as host phases during condensation (e.g., Allen & Mason 1973;Mason & Graham 1970). However, the host minerals in meteorites may only preserve the '' final '' product of the condensation sequence, leaving aside any subsequent changes from mineral processing and alteration on the meteorite parent body after accretion of nebular condensates.…”

Section: Elementmentioning

confidence: 99%

Solar System Abundances and Condensation Temperatures of the Elements

Lodders

2003

ApJ

4,263

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Solar photospheric and meteoritic CI chondrite abundance determinations for all elements are summarized and the best currently available photospheric abundances are selected. The meteoritic and solar abundances of a few elements (e.g., noble gases, beryllium, boron, phosphorous, sulfur) are discussed in detail. The photospheric abundances give mass fractions of hydrogen (X ¼ 0:7491), helium (Y ¼ 0:2377), and heavy elements (Z ¼ 0:0133), leading to Z=X ¼ 0:0177, which is lower than the widely used Z=X ¼ 0:0245 from previous compilations. Recent results from standard solar models considering helium and heavy-element settling imply that photospheric abundances and mass fractions are not equal to protosolar abundances (representative of solar system abundances). Protosolar elemental and isotopic abundances are derived from photospheric abundances by considering settling effects. Derived protosolar mass fractions are X 0 ¼ 0:7110, Y 0 ¼ 0:2741, and Z 0 ¼ 0:0149. The solar system and photospheric abundance tables are used to compute self-consistent sets of condensation temperatures for all elements.

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Section: Elementmentioning

confidence: 99%

Solar System Abundances and Condensation Temperatures of the Elements

Lodders

2003

ApJ

4,263

227

4,623

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“…The procedure followed in the present investigation was similar to that used in an earlier investigation on meteorite minerals (Mason and Graham 1970), except that a new method of photoplate data processing, described by Taylor (1971), was employed.…”

Section: Vol 15mentioning

confidence: 99%

Minor and trace element distribution in minerals of the Muzzle River Gabbro

Mason

1972

New Zealand Journal of Geology and Geophysics

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Minor and trace elements in the Muzzle River gabbro are concentrated mainly in the accessory minerals, especially apatite and sphene. These minerals contain the major part of the lanthanides, Y, D, and Th. Sphene, but not apatite, is highly enriched in Sc, Zr, Nb, Sn, Sb, Hf, W, and Pb. Barium and rubidium are concentrated in biotite and orthoclase. The feldspars show positive europium anomalies, which are plausibly ascribed to the presence of this element in the divalent state.

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“…Main phases dissolved in HC I are olivine and troilite for the ordinary chondrites . Considering the difficulty of substantial migration of REE into these minerals (Mason and Graham, 1970), it is inferred that Sm and La recovered in the HCI treatment were present in the phosphate minerals, which were not leached in the preceding EDTA steps.…”

Section: Distribution Of Ree In Ordinary Chondritesmentioning

confidence: 99%

“…The HCI-resistant fraction consists of pyroxene and plagioclase for the most part. According to Mason and Graham (1970), pyroxene is the main host phase for the REE unaccompanied with phosphorus. Table 2 shows the Sm budgets for four chondrites under the assumption that phosphate and pyroxene are the major constituent minerals for the REE.…”

Section: Distribution Of Ree In Ordinary Chondritesmentioning

confidence: 99%

“…Ca-phosphate is also the host mineral for the rare earth elements (REE) in the ordinary chondrites (Mason and Graham, 1970;Allen and Mason, 1973;Curtis and Schmitt, 1979;Ebihara and Honda, 1983). Based on the REE abundances Ebihara and Honda ( 1983) suggested that chemical fractionation had taken place among the actinoid and lanthanoid elements during the formation of some ordinary chondrites.…”

Section: Introductionmentioning

confidence: 99%

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