Geologic map of the Chinese Camp and Moccasin Quadrangles, Tuolumne County, California
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Miscellaneous Field Studies Map↗
Geology topics
B. A. Morgan
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Geology and resources of titanium
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Professional Paper↗
Chemistry and mineralogy of garnet pyroxenites from Sabah, Malaysia
Garnet pyroxenites and corundum-garnet amphibolites from the Dent peninsula of eastern Sabah (North Borneo) occur as blocks in a slump breccia deposit of late Miocene age. The earliest formed minerals include pyrope-almandine garnet, tschermakitic augite, pargasite, and rutile. Cumulate textures are present in two of the six specimens studied. The earlier fabric has been extensively brecciated and partly replaced by plagioclase, ilmenite, and a fibrous amphibole. The bulk composition and mineralogy of these rocks are similar to those of garnet pyroxenite lenses within ultramafic rocks. Estimated temperature and pressure for the origin of the Sabah garnet pyroxenites is 850±150° C and 19±4 kbar.
Contributions to Mineralogy and Petrology↗