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Record Details

Record 20 of 37162
Major element chemical compositions of chondrules in unequilibrated chondrites
Author and Affiliation:
Ikeda, Y.(Ibaraki Univ., Hitachi, Japan)
Abstract: The chemical compositions (except for metals and sulfides in chondrules) of more than 500 chondrules from unequilibrated E, H, L, LL, and C chondrites were measured using a broad beam of an electron-probe microanalyzer. The compositions of chondrules can be represented by various mixtures of normative compositions of olivine, low-Ca pyroxene, plagioclase, and high-Ca pyroxene with minor amounts of spinel, feldspathoid, SiO2-minerals, etc., indicating that the chondrule precursor materials consisted of aggregates of these minerals. The Al, Na, and K contents of most chondrules reflect the compositions of the ternary feldspar (An-Ab-Kf) of the chondrule precursor materials, and chemical types of chondrules (KF, SP, IP, and CP) are defined on the basis of the atomic proportion of Al, Na, and K.
Publication Date: Jan 01, 1984
Document ID:
19850007293
(Acquired Nov 13, 1995)
Accession Number: 85N15602
Subject Category: LUNAR AND PLANETARY EXPLORATION
Coverage: Topical Abstract only
Document Type: Conference Paper
Publication Information: Lunar and Planetary Institute The 47th Ann. Meteoritical Soc. Meeting; p. 1 p
Publisher Information: Japan
Financial Sponsor: NASA; United States
Organization Source: Ibaraki Univ.; Dept. of Earth Sciences.; Hitachi, Japan
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: CHEMICAL COMPOSITION; CHONDRITES; CHONDRULE; ALUMINUM; CHEMICAL ANALYSIS; CRYSTALS; ELECTRON PROBES; POTASSIUM; RATIOS; SODIUM
Imprint And Other Notes: In Lunar and Planetary Institute The 47th Ann. Meteoritical Soc. Meeting 1 p (SEE N85-15599 06-91)
Availability Source: Other Sources
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