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Heavy-mineral concentrates (garnets, chromites) and xenoliths from 21 Cretaceous-Tertiary kimberlite intrusions have been used to map the lithospheric mantle beneath the Lac de Gras area in the central part of the Slave Province. Analyses of Nickel Temperature (T Ni ) and Zinc Temperature (T Zn )...
Olivine-Bearing zone I (OB I) is host to the principal platinum-group element deposit of the Stillwater complex, the J-M reef. OB I is characterized by a lower Troctolite subzone composed of troctolite, dunite, gabbronorite and anorthosite, and an overlying Anorthosite subzone composed largely of...
On the basis of their structural and compositional characteristics, mafic rocks in the Ronda peridotite are classified into four groups: group A (garnet-bearing rocks) occurring in the spinel tectonite domain; group B (spinel websterites) along the recrystallization front; group C (Ti-rich spinel...