The geologic model developed from the consistent pattern of finding PGM rich anorthositic
rocks just to the east of a xenolithic contact zone between the troctolite of the SKI and the Anorthositic
Lunar geology can be roughly broken down into two categories-the anorthositic
highlands, rich in calcium and aluminum, and the basaltic "maria," giant impact basins filled with solidified lava flows that are abundant in iron and magnesium.
The drilling has intersected packages of both cumulate and intrusive style magnetite-ilmenite mineralisation intercalated with gabbroic and anorthositic
Emplacement sequence of anorthositic
rocks in the southeastern portion of the Nain Complex.
dipping magnetite rich layer about 150m thick within an anorthositic
In addition, the overlying anorthositic
, Middle Unit (MU) contains three PGE enriched zones and hole RP03-01 on the southern boundary of Rooipoort contains the best PGE values in one of these zones intersected to date (Table: 1).
The mineralization is hosted by anorthositic
wallrock adjacent to the eastern margin of the SKI, and is characterized by a different tenor from most other mineralization seen thus far in the SKI.
Coughlan (1986) recognized five units in the Staples Mountain Gabbro, designated I to V from inferred bottom to top: I--gabbro, anorthositic
gabbro, and olivine gabbro; II--subophitic augite gabbro; III--interlayered norite and anortbosite; IV--unlayered augite gabbro and minor olivine gabbro; V --unlayered gabbronorite, with increased orthopyroxene and no olivine, in contrast to unit IV.
The target is entirely overburden covered and four widely spaced drill holes put down in the anomaly intersected layered gabbroic to anorthositic
The first new area of mineralization comprises PGE mineralization along the eastern side of the SKI and within the adjacent anorthositic
rocks on the East Shore Property as shown in Figures 1 and 2.
The drilling has intersected stacked packages of both cumulate and intrusive style magnetiteilmenite mineralisation intercalated with gabbroic and anorthositic
2 Ma from one of the gabbroic plutons shows that the gabbroic plutons arc co-genetic with the dioritic to granitic plutons, although they show varied ultramafic to anorthositic
and dioritic compositions as a result of crystal accumulation.