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THE CHEMISTRY AND MINERALOGY OF THE HOMEWOOD, MANITOBA, METEORITE
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The Homewood meteorite is a slightly weathered find of 325 grams discovered in 1970 about 64 km southwest of Winnipeg, Manitoba. It consists of olivine (Fa25.4; 43.8 normative wt. percent), orthopyroxene (Fs23.3; 28.5 percent), kamacite and taenite (7.5 percent), troilite (5.6 percent), maskelynite (8.3 percent), chromite (1.0 percent), whitlockite (0.7 percent) and minor patchy Ca pyroxene. Bulk chemical analysis yielded Fetotal 21.60 wt. percent, Fe/SiO20.55, SiO2/MgO 1.53 and FeO/Fetotal 0.29. Barred olivine, radiating pyroxene and porphyritic chondrules, all with ill‐defined outlines, occur in the meteorite. Most chemical and mineralogical features characterize the Homewood meteorite as an L6 (hypersthene) chondrite. The presence of maskelynite, the undulatory extinction, extensive fracturing and pervasive mosaicism of olivine, and the poor definition of chondrule outlines suggest that the Homewood meteorite has been shocked in the range of 300–350 kbar.
Title: THE CHEMISTRY AND MINERALOGY OF THE HOMEWOOD, MANITOBA, METEORITE
Description:
The Homewood meteorite is a slightly weathered find of 325 grams discovered in 1970 about 64 km southwest of Winnipeg, Manitoba.
It consists of olivine (Fa25.
4; 43.
8 normative wt.
percent), orthopyroxene (Fs23.
3; 28.
5 percent), kamacite and taenite (7.
5 percent), troilite (5.
6 percent), maskelynite (8.
3 percent), chromite (1.
0 percent), whitlockite (0.
7 percent) and minor patchy Ca pyroxene.
Bulk chemical analysis yielded Fetotal 21.
60 wt.
percent, Fe/SiO20.
55, SiO2/MgO 1.
53 and FeO/Fetotal 0.
29.
Barred olivine, radiating pyroxene and porphyritic chondrules, all with ill‐defined outlines, occur in the meteorite.
Most chemical and mineralogical features characterize the Homewood meteorite as an L6 (hypersthene) chondrite.
The presence of maskelynite, the undulatory extinction, extensive fracturing and pervasive mosaicism of olivine, and the poor definition of chondrule outlines suggest that the Homewood meteorite has been shocked in the range of 300–350 kbar.
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