Rare Gases in the Iron and in the Inclusions of the Campo Del Cielo Meteorite, El Taco

Hintenberger, H.; Schultz, L.; Weber, H. W.

doi:10.1007/978-94-010-3411-1_71

Cited by 12 publications

(10 citation statements)

References 5 publications

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“…(2) Acapulcoites contain planetary-type noble gases at higher concentrations than in equilibrated OC (e.g., Palme et al, 1981). Such gases are found in chondrites (e.g., Signer and Suess, 1963) and are absent from the differentiated HED meteorites (Hintenberger et al, 1969;Bogard et al, 1971;Begemann et al, 1976). Wasson (1985) stated that the presence of significant amounts of planetary gases in a meteorite is prima facie evidence that the sample was produced by ''minor alteration of chondritic material rather than by igneous differentiation.''…”

Section: Oxygen Isotopic Composition Of Superior Valley 014mentioning

confidence: 98%

“…Slow cooling from elevated temperatures is likely to lead to loss of such gases as apparently occurred in the HED meteorites (e.g., Hintenberger et al, 1969;Bogard et al, 1971;Begemann et al, 1976). Planetary-type noble gases are characteristic of chondrites (e.g., Signer and Suess, 1963), including OC impact-melt breccias (e.g., Belle Plaine, Madrid, Orvinio, Rose City, Shaw, Taiban) (e.g., Schultz and Kruse, 1989).…”

Section: Cooling Historymentioning

confidence: 98%

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Petrogenesis of acapulcoites and lodranites: A shock-melting model

Rubin

2007

Geochimica et Cosmochimica Acta

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Section: Oxygen Isotopic Composition Of Superior Valley 014mentioning

confidence: 98%

Section: Cooling Historymentioning

confidence: 98%

Petrogenesis of acapulcoites and lodranites: A shock-melting model

Rubin

2007

Geochimica et Cosmochimica Acta

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“…Campo del Cielo has been extensively studied since the end of the 18th century, with first results from noble gases isotopic analyses published in 1960‐th (Alexander and Manuel ; Hintenberger et al. ; Alexander et al. ).…”

Section: Introductionmentioning

confidence: 99%

“…One early study of noble gases from Campo del Cielo (Hintenberger et al. ) was performed on two inclusions recovered from a large piece freshly cut from the 1993.8 kg slab of Campo del Cielo referred to as El Taco, a name often erroneously given to the meteorite itself. Besides a variable amount of graphite, these inclusions contained plagioclase, enstatite, diopside, and olivine.…”

Section: Introductionmentioning

confidence: 99%

I‐Xe ages of Campo del Cielo silicates as a record of the complex early history of theIABparent body

Pravdivtseva¹,

Meshik²,

Hohenberg³

et al. 2013

Meteorit & Planetary Scien

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Abstract-Using in situ laser analyses of a polished thin section from the IAB iron meteorite Campo del Cielo, we identified two silicate grains rich in radiogenic 129* Xe, Cr-diopside, and oligoclase, excavated them from the metal, and irradiated them with thermal neutrons for I-Xe dating. The release profiles of 129* Xe and 128* Xe are consistent with these silicates being diopside and oligoclase, with activation energies, estimated using Arrhenius plots, of $201 and $171 kcal mole À1 , respectively. The 4556.4 AE 0.4 Ma absolute I-Xe age of the more refractory diopside is younger than the 4558.0 AE 0.7 Ma I-Xe age of the less refractory oligoclase. We suggest that separate impact events at different locations and depths on a porous initial chondritic IAB parent body led to the removal of the melt and recrystallization of diopside and oligoclase at the times reflected by their respective I-Xe ages. The diopside and oligoclase grains were later brought into the studied inclusion by a larger scale catastrophic collision that caused breakup and reassembly of the debris, but did not reset the I-Xe ages dating the first events. The metal melt most probably was <1250°C when it surrounded studied silicate grains. This reassembly could not have occurred earlier than the I-Xe closure in diopside at 4556.4 AE 0.4 Ma.

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“…Elemental and isotopic abundances of spallogenic noble gases in iron meteorites have been the subject of many investigations since PANETH et al (1952) first reported the presence of spallogenic 'He in meteorites. Measurements of spallogenic He, Ne and Ar in iron meteorites (EBERT and WANKE, 1957;VINOGRADOV et al, 1957;NIER, 1958, 1959;FIRE MAN, 1958;GERLING and LEVSKII, 1958;NIER, 1960, 1962;SCHAEFFER and ZAHRIN GER, 1960;SCHAEFFER and FISHER, 1960;HEY MANN et al, 1966;NYQUIST et al, 1967NYQUIST et al, , 1972NYQUIST et al, , 1973HINTENBERGER et al, 1969;SCHULTZ et al, , 1971 are combined with measure ments of cosmic-ray produced radioactivities in iron meteorites (ARNOLD et al, 1961;LIPSCHTz et al, 1965;SCHAEFFER and HEYMANN, 1965) to obtain information about the length of time that bodies were exposed to cosmic rays, the pre atmospheric size. of the meteoroids, the energy spectrum of cosmic ray primaries and the at tenuation of primary and secondary cosmic ray particles in matter.…”

Section: Introductionmentioning

confidence: 99%

Composition of the noble gases in Canyon Diablo.

Downing

Manuel

1982

Geochem. J.

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Five separate fractions of noble gases were extracted and analyzed as a 150g sample of the Canyon Diablo iron meteorite was heated to successively higher temperatures by direct coupling with an RF coil.Isotopic compositions of the light gases, He, Ne and Ar, demonstrate that essentially their entire inventory was produced by spallation reactions. Spallation products are also a prominent feature of the isotopes of Kr and Xe, but in each gas fraction the spallogenic heavy gases were mixed with a nonspallogenic com ponent. The isotopic composition of Kr and Xe trapped in Canyon Diablo are shown to be type-Y, rather than the type-X Kr and Xe that is found with planetary He and Ne in mildly oxidized carbon fractions of chondrites.

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Rare Gases in the Iron and in the Inclusions of the Campo Del Cielo Meteorite, El Taco

Cited by 12 publications

References 5 publications

Petrogenesis of acapulcoites and lodranites: A shock-melting model

Petrogenesis of acapulcoites and lodranites: A shock-melting model

I‐Xe ages of Campo del Cielo silicates as a record of the complex early history of theIABparent body

Composition of the noble gases in Canyon Diablo.

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