Investigations of the Howland reef of the Stillwater complex, Minneapolis Adit area: stratigraphy, structure and mineralization.
The zone of Pt concentration in the layered Archaean tholeiitic intrusion coincides with the reappearance of olivine. Variable proportions of olivine, bronzite, plagioclase and augite occur, along with phlogopite, hornblende, apatite, sulphides and chrome spinel as accessories. The sulphides include pyrrhotite, pentlandite, chalcopyrite, pyrite, Pt-group minerals and low-T alteration products. -K.A.R.
Bow, C; Wolfgram, D; Turner, A; Barnes, S; Evans, J; Zdepski, M; Boudreau, A
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