Petrology of kimberlite from the DeBruyn and Martin Mine, Bellsbank, South Africa

Abstract

The micaceous kimberlite from DeBruyn and Martin Mine, Bellsbank, South Africa, is composed of olivine, phlogopite, spinels, and perovskite in a groundmass of calcite and phlogopite. Three types of phlogopite are present: macrocrysts [Mg/(Mg+Fe) : 0.93, FeO (3-3.5 wt.%o), TiO2 (0.5-0.7 wt.%), Cr2O3 (0.4-0.45 wt.%o), low Fe2O3, AT 1Fei" in tetrahedral sites… (More)

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