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NUMBER 19 69
Constituent
Olivine
Hypersthene
Diopside
Albite
Orthoclase
TABLE 2.—Normative composition of the Harleton meteorite in weight percent
Weight percent
43.2
25.5
4.9
7.8
1.4
0.6
served in II. This ratio was used to calculate the
FeO value for I. The FeO value for the composite
analysis was based on the total Fe, the direct S,
and the metallic Fe values. The metallic Fe value
in I was determined by correcting the total Fe value
in I for Fe combined as FeS and FeO.
The normative composition of the Harleton
meteorite, calculated from the analysis, is given in
Table 2. The figures are consistent with the
observed mineralogical composition. From the
analysis acid-soluble silicate, which is olivine,
amounts to approximately 42%, compared to 43.2%
in the norm; acid-insoluble silicate (pyroxene and
plagioclase) is 42%, and the norm shows 9.8%
plagioclase and 30.4% pyroxene.
The chemical and mineralogical composition of
the Harleton meteorite shows that it is a typical
olivine-hypersthene chondrite, according to the
classification of Prior (1920). The total iron content,
22.6%, is that of an L (low-iron) group chondrite
in the Urey-Craig classification (1953). Van Schmus
and Wood (1967:764) classify Harleton as an L6
chondrite.
Literature Cited
Bainbridge, A. E., H. E. Suess, and H. Wanke
1962. The Tritium Content of Three Stony Meteorites
and One Iron Meteorite. Geochimica et Cosmochimica
Ada, 26:471-473.
Bunch, T. E., Klaus Keil, and K. G. Snetsinger
1967. Chromite Composition in Relation to Chemistry
and Texture of Ordinary Chondrites. Geochimica et
Cosmochimica Ada, 31:1569-1582.
Davis, R., Jr., R. W. Stoenner, and O. A. Schaeffer
1963. Cosmic-Ray Produced Ar 37 and Ar 39 Activities in
Recently Fallen Meteorites. Pages 355-365 in Radioactive
Dating. Vienna: International Atomic Energy
Agency.
Constituent
Apatite
Chromite
Ilmenite
Troilite
Weight percent
0.5
0.8
0.2
6.6
8.5
Eberhardt, P., O. Eugster, J. Geiss, and K. Marti
1966. Rare Gas Measurements in 30 Stone Meteorites.
Zeitschrift fur Naturforschung, 21a:414-^126.
Fireman, E. L.
1967. Radioactivities in Meteorites and Cosmic-Ray Variations.
Geochimica et Cosmochimica Ada, 31:1691-
1700.
Fireman, E. L., J. DeFelice, and D. Tilles
1963. Tritium and Radioactive Argon and Xenon in
Meteorites and Satellites. Pages 323-334 in Radioactive
Dating. Vienna: International Atomic Energy
Agency.
Goel, Parmatma S., and Truman P. Kohman
1962. Cosmogenic Carbon-14 in Meteorites and Terrestrial
Ages of "Finds" and Craters. Science, 136:875-876.
Grimaldi, F. S.
1960. Dilution-Addition Method for Flame Spectrophotometry.
U.S. Geological Survey Professional Paper,
400B:494-495.
Hillebrand, W. F., G. E. F. Lundell, H. A. Bright, and
J. I. Hoffman
1953. Applied Inorganic Analysis. 2nd edition, 1034 pages.
New York: John Wiley and Sons.
Honda, Masatake, and James R. Arnold
1964. Effects of Cosmic Rays on Meteorites. Science
, 143:203-212.
Kohman, T. P., and P. S. Goel
1963. Terrestrial Ages of Meteorites from Cosmogenic C M .
Pages 395-411 in Radioactive Dating. Vienna: International
Atomic Energy Agency.
Kuno, H.
1954. Study of Orthopyroxene from Volcanic Rocks. American
Mineralogist, 39:30-46.
Loveland, W., R. A. Schmitt, and D. E. Fisher
1969. Aluminum Abundances in Stony Meteorites. Geochimica
et Cosmochimica Ada, 33:375-385.
Mabuchi. H., J. Tobailem, C. Leger, and R. Bibron
1968. Radioactivite induite par le rayonnement cosmique
dans la meteorite Granes. Geochimica et, Cosmochimica
Ada, 32:949-963.
Moss, A. A., M. H. Hey, and D. I. Bothwell
1961. Methods for the Chemical Analysis of Meteorites,
I: Siderites, Mineralogical Magazine, 32:802-816.