Ragland - an LL3.4 chondrite find from New Mexico

Details Ragland - an LL3.4 chondrite find from New Mexico Ragland - an LL3.4 chondrite find from New Mexico

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986metic..21..217r&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 21, June 30, 1986, p. 217-229. SNSF-supported research.

Computer Science

6

Chondrites, Meteoritic Composition, Mineralogy, Abundance, Argon Isotopes, Olivine, Oxygen Isotopes, Petrology, Pyroxenes, Thermoluminescence

Scientific paper

The Ragland, New Mexico, chondrite was found in 1978. It consists of a single stone of 12.16 kg that broke into three pieces. The stone is moderately weathered and has a pronounced chondritic texture. Bulk composition favors an LL classification, and modal analysis and oxygen isotopic composition are consistent with this. The thermoluminescence sensitivity of 0.056 + or - 0.020 normalized to Dhajala, compositional variability of olivine (mean Fa 18.3, sigma = 10.1) and low-Ca pyroxene (mean Fs 14.6, sigma = 6.7), and Ca concentrations in olivine indicate metamorphic subtype 3.4 + or - 0.1. The isotopically heavy oxygen composition, which is characteristic of subtypes 3.0-3.1, may be a primary characteristic and not a result of weathering. Low concentrations of radiogenic Ar-40 and planetary Ar-36 suggest noble gas loss.

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