Titlebook: Geo-Platinum 87; H. M. Prichard,P. J. Potts,S. J. Cribb Book 1988 Elsevier Science Publishers Ltd 1988 Mafic.chemistry.dyke.geochemistry.g

arabesque

frozen-shoulder

Nickel-Copper and Precious Metal Mineralisation in the Caledonian Mafic and Ultramafic Intrusions ofnclude xenolithic, contaminated and granular gabbroic varieties. They were emplaced 489 ± 17mya and postdate the regional foliation in the country rock metasediments, but are themselves locally deformed by a set of regional ductile shear zones.

一夫一妻制

駭人

Platinum-Group Elements and Au Distribution in Ni Arsenide-Chromite Veins from the Rifo-Betic Lherzoeni-Bousera) there are about 50 veins of a very peculiar Ni-Cr mineralization including an association of niccolite and Zn-V-rich chromite with accessory arsenides, sulphoarsenides, sulphides and graphite; the gangue minerals are orthopyroxene or cordierite. They are associated with pyroxenite dikes

Exclaim

極深

DALLY

易彎曲

Spinel Non-stoichiometry as the Explanation for Ni-, Cu- and PGE-enriched Sulphides in Chromitites, if the fS. is buffered to that of sulphide cooling as a closed system, Fe-Ni-S sulphide containing 20 mole % NiS in equilibrium with chromite of the composition of the UG-2 can lose Fe to the chromite, using a high proportion of the available vacancies in the chromite at 1150°C. Depending on the m

船員

The Use of Mantle Normalization and Metal Ratios in Discriminating between the Effects of Partial Merelative to Ni and Cu and the metal patterns will have an overall trough shape. Conversely any rocks containing these sulphides will be enriched in noble metals relative to Ni and Cu and the metal patterns will have an arch shape (characteristic of Pt reefs). Chromite-rich rocks tend to be enriched

煉油廠

The Significance of Cumulus Chlorapatite and High-temperature Dashkesanite to the Genesis of PGE Minion of sedimentary sulphides triggered the deposition of massive sulphides. PGE occur only in overlying meagre disseminations (Pt-Pd-Au), and reach the highest concentrations in chromite-rich rocks (Os-Pt-Pd) at the roof. The distribution of PGE in these intrusions has an unusual pattern. Disseminat