Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Anthony J. Naldrett"'
Autor:
Marina A. Yudovskaya, Gelu Costin, Judith A. Kinnaird, Anthony J. Naldrett, Jonathan A. S. Woolfe
Publikováno v:
Journal of Petrology. 56:2373-2394
Trace-element study and age dating of zircon from chromitites of the Bushveld Complex (South Africa)
Autor:
Anthony J. Naldrett, Anton A. Antonov, D. V. Kuzmin, Sergey Simakin, Marina A. Yudovskaya, Judith A. Kinnaird, Nickolay Rodionov
Publikováno v:
Mineralogy and Petrology. 107:915-942
The layered Bushveld Complex hosts a number of chromitite layers, which were found to contain significant amounts of zircon grains compared with adjacent silicate rocks. Cathodoluminescent-dark, partially metamict cores and transparent rims of compos
Publikováno v:
Economic Geology. 107:507-524
The Hongge giant Fe-Ti-V oxide ore deposit is hosted by a layered intrusion located in the central part of the Emeishan large igneous province, SW China. The intrusion is relatively small in comparison with other typical oxide-bearing intrusions worl
FACIES VARIATION IN PGE MINERALIZATION IN THE CENTRAL PLATREEF OF THE BUSHVELD COMPLEX, SOUTH AFRICA
Autor:
Judith A. Kinnaird, Christian Reinke, Andrey V. Mokhov, Anthony J. Naldrett, Iain McDonald, Marina A. Yudovskaya
Publikováno v:
The Canadian Mineralogist. 49:1349-1384
AfricaAabsStractThe lateral variation in platinum-group mineral (PGM) assemblages in the magmatic constituents of the Platreef, Bushveld Complex, have been investigated using whole-rock PGE data, scanning electron microscope observations and electron
Publikováno v:
Mineralium Deposita. 47:209-232
This article reports a study of chromitites from the LG-1 to the UG-2/3 from the Bushveld Complex. Chromite from massive chromitite follows two compositional trends on the basis of cation ratios: trend A—decreasing Mg/(Mg + Fe) with increasing Cr/(
Autor:
Anthony J. Naldrett
Publikováno v:
Economic Geology. 105:669-688
Magmatic sulfide deposits are divisible into two major groups, those that are valued primarily for their Ni and Cu and that are mostly sulfide rich (>10% sulfide), and those that are valued primarily for their PGE and tend to be sulfide poor (3.0 Ga)
Autor:
Anthony J. Naldrett
Publikováno v:
South African Journal of Geology. 113:1-32
The life of a magmatic Ni sulfide deposit can be envisaged as a series of stages: (1) birth of the magma in the source (mantle melting); (2) development of the magma (ascent into the crust); (3) fertilisation of the magma (interaction with the crust
Publikováno v:
Journal of Petrology. 50:625-659
The Merensky Reef is the consequence of several major influxes of magma into the Bushveld magma chamber that gave rise to at least two cyclic units, including the Pre-Merensky and Merensky cyclic units. Analysis of the S, Ni, Cu, platinum group eleme
Publikováno v:
Economic Geology. 104:291-301
The Kharaelakh intrusion is one of several sill-like, multiphase gabbroic intrusions that host world-class Ni-Cu-PGE deposits in the Noril’sk-Talnakh region. The sulfide ores of the Kharaelakh intrusion are characterized by elevated δ34S values (1
Autor:
Anthony J. Naldrett, James E. Mungall
Publikováno v:
Elements. 4:253-258
The formation of ore deposits of the platinum-group elements (PGE) requires that their concentrations be raised about four orders of magnitude above typical continental crustal abundances. Such extreme enrichment relies principally on the extraction