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MINERALOGY AND CHEMISTRY OF THE KYLE, TEXAS, CHONDRITE
Author(s) -
Fodor R. V.,
Keil Klaus,
Jarosewich E.,
Huss G. I.
Publication year - 1971
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1971.tb00410.x
Subject(s) - troilite , chondrite , meteorite , kamacite , whitlockite , geology , chondrule , chromite , olivine , ilmenite , mineralogy , plagioclase , geochemistry , ordinary chondrite , astrobiology , apatite , paleontology , physics , quartz
The Kyle, Texas, U.S.A., chondrite was identified in 1965. Electron microprobe analyses and microscopic examination show the following mineralogy: olivine (Fa 26.2 mole %), orthopyroxene (Fs 21.0 mole %), clinopyroxene, plagioclase (An 10.3 mole %), chlorapatite, whitlockite, kamacite, taenite, troilite, chromite, and an iron‐bearing terrestrial weathering product. Eutectic intergrowths of metaltroilite and a brecciated matrix indicate that the Kyle chondrite was shocked. Recrystallization and shock have obliterated chondrule‐matrix boundaries. A chemical analysis of the meteorite shows the following results (in weight %) : Fe 0.38, Ni 1.22, Co 0.05, FeS 5.98, SiO 2 38.41, TiO 2 0.11, Al 2 O 3 2.13, Cr 2 O 3 0.55, Fe 2 O 3 8.02, FeO 14.83, MnO 0.31, MgO 23.10, CaO 1.60, Na 2 O 0.74, K 2 O 0.08, P 2 O 5 0.19, H 2 O + 1.73, H 2 O − 0.37, C 0.03, Sum 99.83. On the basis of bulk chemistry, composition of olivine and orthopyroxene, and the recrystallized matrix, the Kyle meteorite is classified as an L6 chondrite.