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Chemistry and mineralogy of garnet pyroxenites from Sabah, Malaysia

September 28, 2010

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.

Citation Information

Publication Year 1974
Title Chemistry and mineralogy of garnet pyroxenites from Sabah, Malaysia
DOI 10.1007/BF00951337
Authors B.A. Morgan
Publication Type Article
Publication Subtype Journal Article
Series Title Contributions to Mineralogy and Petrology
Series Number
Index ID 70001277
Record Source USGS Publications Warehouse
USGS Organization