within layered mafic/ultramafic intrusions. In the case of layered intrusions, the ratios element geochemistry of the Lower and. Middle Group Chromitites of the Eastern. Bushveld Complex, Econ.
within layered mafic/ultramafic intrusions. the Merensky Reef, South Africa; the. J-M Reef of the Stillwater Complex, USA; and the Great Dyke, Zimbabwe). Wider zones of PGE sulfide enrichment. within mafic/ultramafic intrusions (. Munni Munni, Australia; River Valley and. East Bull Lake Intrusions, Canada). In the case of layered intrusions, the ratios. of the PGE to elements such as S, Cu and Se are. much more useful exploration tools than absolute. element geochemistry of the Lower and.
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It is estimated that nt (PGE) - enriched zones of several meters thickness could be present at depth in the mafic-ultramafic intrusion. Chondrite - normalised plots reveal that the ultramafic rocks have a similar PGE fractionation trend as the Bushveld and Stillwater layered complexes. This contrasts with the ophiolite-type ultramafic associations of the Sierras Pampeanas in Cordoba Province, which occur about 400 km to the northeast of the study area.
Petrology and nt geochemistry of Archaean layered mafic-ultramafic intrusions, west Pilbara . Geology and economic potential of the Palaeoproterozoic layered mafic-ultramafic intrusions in the East Kimberley, Western Australia.
Petrology and nt geochemistry of Archaean layered mafic-ultramafic intrusions, west Pilbara Block, Western Australia. 243. Detailed studies of the Mount Isa Inlier. 247. Geology of the Prince Charles Mountains, Antarctica.
Basic geological regions of Australia, by age. The geology of Australia . the Giles Complex mafic-ultramafic intrusions in the Musgrave Block at ~1080 Ma. The geology of Australia includes virtually all known rock types and from all geological time periods spanning over . billion years of the Earth's history. Australia is a continent situated on the Indo-Australian Plate. The continental crust is composed primarily of Archaean, Proterozoic and some Palaeozoic granites and gneisses. A thin veneer of mainly Phanerozoic sedimentary basins cover much of the Australian landmass (these are up to 7 km thick).
HOATSON,DM, WALLACE,DA, SUN,S-S, MACIAS,LF, SIMPSON,CJ and KEAYS,RR (1992) Petrology and nt geochemistry of Archaean layered mafic-ultramafic intrusions, west Pilbara block, Western Australia. Hoatson, "A LASER-RAMAN MICROPROBE STUDY OF PLATINUM-GROUP MINERALS FROM THE MUNNI-MUNNI LAYERED INTRUSION, WEST PILBARA BLOCK, WESTERN-AUSTRALIA", Canadian Mineralogist, 33, 1995, pp. 409-417.
Use of geochemistry as a guide to platinum group element potential of mafic-ultramafic rocks: examples from the west Pilbara Block and Halls Creek Mobile Zone, Western Australia. Gebre-Mariam, M. Groves, D. I. McNaughton, N. J. Mikucki, E. and Vearncombe, J. R. 1993. Archaean Au−Ag mineralisation at Racetrack, near Kalgoorlie, Western Australia: a high crustal-level expression of the Archaean composite lode-gold system.
They comprise: (a) ring-zoned, Ural-Alaskan type bodies of the 'Pt-bearing belt' (Kachkanar, Tagil, Uktus); and (b) te complexes overlain by layered wehrlite, gabbro, and diorite (Nurali, Mindyak) supposed to be ophiolite-type suites. Total PGE and Au contents are generally higher in Ural-Alaskan type complexes compared with te complexes.
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