Geo-Platinum 87

Front Matter....Pages i-xvi
Exploration for Platinum: a Contemporary Viewpoint....Pages 1-12
The Platinum Market: Recent History and Future Developments....Pages 13-20
Evaluation of the Nickel Sulphide Bead Method of Fire-assay for the Platinum-Group Elements using Neutron Activation Analysis....Pages 21-27
Preconcentration of Precious Metals by Tellurium Sulphide Fire-assay Followed by Instrumental Neutron Activation Analysis....Pages 29-42
The Potential of Fire-assay and ICP-MS for the Determination of Platinum-Group Elements in Geological Materials....Pages 43-44
ICP-AES Determination of Precious Metals in Difficult Materials....Pages 45-45
New Detection Techniques for Locating Precious Metal Minerals by Beta Autoradiography: Preliminary Results for Rhodium and Silver Grains....Pages 47-56
Solubility and Transport of Platinum-Group Elements in Hydrothermal Solutions: Thermodynamic and Physical Chemical Constraints....Pages 57-82
New Mechanisms for the Mobilization of the Platinum-Group Elements in the Supergene Zone....Pages 83-92
Spinel Non-stoichiometry as the Explanation for Ni-, Cu- and PGE-enriched Sulphides in Chromitites....Pages 93-109
The Potential for Hydrothermal Platinum Deposits....Pages 111-112
The Use of Mantle Normalization and Metal Ratios in Discriminating between the Effects of Partial Melting, Crystal Fractionation and Sulphide Segregation on Platinum-Group Elements, Gold, Nickel and Copper: Examples from Norway....Pages 113-143
Noble Metal Geochemistry of some Ni-Cu Deposits in the Sveconorwegian and Caledonian Orogens in Norway....Pages 145-158
The Significance of Cumulus Chlorapatite and High-temperature Dashkesanite to the Genesis of PGE Mineralization in the Koitelainen and Keivitsa-Satovaara Complexes, Northern Finland....Pages 159-160
The Shetland Ophiolite: Evidence for a Supra-subduction Zone Origin and Implications for Platinum-Group Element Mineralization....Pages 161-161
Nickel-Copper and Precious Metal Mineralisation in the Caledonian Mafic and Ultramafic Intrusions of North-East Scotland....Pages 163-164
Platinum-Group Element Analyses of Serpentinites in the Eastern Central Alps, from Davos (Switzerland) to the Valmalenco (Italy)....Pages 165-177
Further Data on Platinum—Palladium Minerals from the Ivrea-Verbano Sulphide Deposits....Pages 179-179
Platinum-Group Elements and Au Distribution in Ni Arsenide-Chromite Veins from the Rifo-Betic Lherzolite Massifs (Morocco—Spain)....Pages 181-198
PGE Distribution in some Ultramafic Rocks and Minerals from the Bou-Azzer Ophiolite Complex (Morocco)....Pages 199-210
Exploration for Platinum-Group Elements in the Labrador Trough, Canada....Pages 211-214
Platinum-Group Element Mineralisation and the Relative Importance of Magmatic and Deuteric Processes: Field Evidence from the Lac des Iles Deposit, Ontario, Canada....Pages 215-236
Platinum-Group Mineral Precipitation from Fluids in Pegmatitic Gabbro: Two Duck Lake Intrusion, Coldwell Complex, Ontario, Canada....Pages 237-237
Interelement Correlation, Stratigraphic Variation and Distribution of PGE in the Ultramafic Series of the Bird River Sill, Canada....Pages 239-249
Distribution of PGE in Sulphides of the Bay of Islands Ophiolite Complex, Newfoundland....Pages 251-252
Chemical Evolution of Vapor during Crystallization of the Stillwater Complex....Pages 253-254
The Distribution of the Platinum-Group Elements in the Palisades Sill, New Jersey and New York....Pages 255-256
Platinum-Group Element Mineralogy of the Pole Corral Podiform Chromite Deposit, Rattlesnake Creek Terrane, Northern California....Pages 257-257
PGE in Hawaiian Basalt: Implications of Hydrothermal Alteration on PGE Mobility in Volcanic Fluids....Pages 259-259
Platinum-Group Minerals in Chromite-rich Horizons of the Niquelandia Complex (Central Goias, Brazil)....Pages 261-272
Further Studies of the Development of Platinum-Group Minerals in the Laterites of the Freetown Layered Complex, Sierra Leone....Pages 273-280
The Geology and Economic Potential of the PGE-rich Main Sulphide Zone of the Great Dyke, Zimbabwe....Pages 281-302
PGE- and Au-Distribution in Rift-related Volcanics, Sediments and Stratabound Cu/Ag Ores of Middle Proterozoic Age in Central SWA/Namibia....Pages 303-317
PGE in the 3·5 Ga Jamestown Ophiolite Complex, Barberton Greenstone Belt, with Implications for PGE Distribution in Simatic Lithosphere....Pages 319-341
Evidence for Fluid in the Footwall Beneath Potholes in the Merensky Reef of the Bushveld Complex....Pages 343-356
Geochemistry of the Mount Ayliff Intrusion and the Origin of Associated Sulphide Mineralization....Pages 357-357
The Effects of Metasomatising Fluids on the PGE-content of the UG-1 Chromitite Layer....Pages 359-360
Platinum-Group Element Mineralization in the Ultramafic Sequence of the Acoje Ophiolite Block, Zambales, Philippines....Pages 361-380
Platinum-Group Element Abundance in Chromite Deposits of the Acoje Ophiolite Block, Zambales Ophiolite Complex, Philippines....Pages 381-382
Platinum-Group Minerals in Ophiolitic Chromitites and Alluvial Placer Deposits, Meratus-Bobaris Area, Southeast Kalimantan....Pages 383-403
Platinum-Group Minerals in the Tiébaghi (New-Caledonia) and Vourinos (Greece) Ophiolites....Pages 405-405
Platinum-Group Element Chemistry in Relation to the Behaviour of Individual PGEs in Primary and Secondary Geological Processes....Pages 407-407
Gold and Iridium in Sulphides from Submarine Basalt Glasses....Pages 409-410
PGE and other Trace Element Geochemistry at some Distinct Phanerozoic Stratigraphic Horizons....Pages 411-412
Back Matter....Pages 413-422