Search Results - "Barnes, S J"

The Bushveld Complex, South Africa: formation of platinum–palladium, chrome- and vanadium-rich layers via hydrodynamic sorting of a mobilized cumulate slurry in a large, relatively slowly cooling, subsiding magma chamber by Maier, W. D., Barnes, S.-J., Groves, D. I.

“…Platinum-group element (PGE) deposits in the Bushveld Complex and other layered intrusions form when large, incompletely solidified magma chambers undergo…”
Get full text

A chilled margin of komatiite and Mg-rich basaltic andesite in the western Bushveld Complex, South Africa by Maier, W. D., Barnes, S.-J., Karykowski, B. T.

“…A chill sequence at the base of the Lower Zone of the western Bushveld Complex at Union Section, South Africa, contains aphanitic Mg-rich basaltic andesite and…”
Get full text

Formation of Bushveld anorthosite by reactive porous flow by Maier, W. D., Barnes, S.-J., Muir, D., Savard, D., Lahaye, Y., Smith, W. D.

“…Bushveld anorthosites commonly contain the so-called “mottles” comprising irregular, typically centimetric domains of oikocrystic pyroxene or olivine enclosing…”
Get full text

The concentration of platinum-group elements and gold in southern African and Karelian kimberlite-hosted mantle xenoliths: Implications for the noble metal content of the Earth's mantle by Maier, W.D., Peltonen, P., McDonald, I., Barnes, S.J., Barnes, S.-J., Hatton, C., Viljoen, F.

“…We have determined the concentrations of the platinum-group elements and gold in 111 mantle xenoliths from more than 20 kimberlite pipes in southern Africa and…”
Get full text

Distribution of platinum-group and chalcophile elements in the Aguablanca Ni–Cu sulfide deposit (SW Spain): Evidence from a LA-ICP-MS study by Piña, R., Gervilla, F., Barnes, S.-J., Ortega, L., Lunar, R.

“…The concentrations of platinum-group elements (PGE) and chalcophile elements Ni, Co, Au, Ag, Se, Re, Cd, Bi, Te and As have been determined by laser…”
Get full text

Chalcophile and platinum-group element distribution in pyrites from the sulfide-rich pods of the Lac des Iles Pd deposits, Western Ontario, Canada: Implications for post-cumulus re-equilibration of the ore and the use of pyrite compositions in exploration by Duran, C.J., Barnes, S.-J., Corkery, J.T.

“…The Lac des Iles Pd-deposits are atypical within the scope of platinum-group element (PGE) deposits. This is because the deposits do not resemble a classical…”
Get full text

The Penikat Intrusion, Finland: Geochemistry, Geochronology, and Origin of Platinum–Palladium Reefs by Maier, W D, Halkoaho, T, Huhma, H, Hanski, E, Barnes, S -J

“…ABSTRACT The Palaeoproterozoic Penikat layered ultramafic–mafic intrusion in northern Finland is one of the most richly mineralized layered intrusions on…”
Get full text

Platinum-group element concentrations in pyrite from the Main Sulfide Zone of the Great Dyke of Zimbabwe by Piña, R., Gervilla, F., Barnes, S.-J., Oberthür, T., Lunar, R.

“…The Main Sulfide Zone (MSZ) of the Great Dyke of Zimbabwe hosts the world’s second largest resource of platinum-group elements (PGE) after the Bushveld Complex…”
Get full text

Trace element distribution in primary sulfides and Fe–Ti oxides from the sulfide-rich pods of the Lac des Iles Pd deposits, Western Ontario, Canada: Constraints on processes controlling the composition of the ore and the use of pentlandite compositions in exploration by Duran, C.J., Barnes, S.-J., Corkery, J.T.

“…There is an on-going debate as to whether the Lac des Iles Pd deposits (Ontario, Canada) are of magmatic or hydrothermal origin. An aspect of the deposits that…”
Get full text

The Uitkomst intrusion and Nkomati Ni-Cu-Cr-PGE deposit, South Africa: trace element geochemistry, Nd isotopes and high-precision geochronology by Maier, W.D., Prevec, S.A., Scoates, J.S., Wall, C.J., Barnes, S.-J., Gomwe, T.

“…The Uitkomst intrusion is a tubular mafic-ultramafic layered body that hosts one of South Africa’s largest Ni-Cu-Cr-PGE deposits, Nkomati. The sulphide ore…”
Get full text

Liquid immiscibility between arsenide and sulfide melts: evidence from a LA-ICP-MS study in magmatic deposits at Serranía de Ronda (Spain) by Piña, R., Gervilla, F., Barnes, S.-J., Ortega, L., Lunar, R.

“…The chromite-Ni arsenide (Cr-Ni-As) and sulfide-graphite (S-G) deposits from the Serranía de Ronda (Málaga, South Spain) contain an arsenide assemblage…”
Get full text

Composition of the ultramafic–mafic contact interval of the Great Dyke of Zimbabwe at Ngezi mine: Comparisons to the Bushveld Complex and implications for the origin of the PGE reefs by Maier, W.D., Määttää, S., Yang, S., Oberthür, T., Lahaye, Y., Huhma, H., Barnes, S.-J.

“…The Great Dyke contains the world's second largest platinum resource after the Bushveld Complex. Isotopic and trace element data from the interval straddling…”
Get full text

Predicting phosphate saturation in silicate magmas: An experimental study of the effects of melt composition and temperature by Tollari, N., Toplis, M.J., Barnes, S.-J.

“…A series of 1 atm experiments has been performed to test the influence of iron content and oxidation state on the saturation of phosphate minerals in magmatic…”
Get full text

Zircon provenance in meta-sandstones of the São Roque Domain: Implications for the Proterozoic evolution of the Ribeira Belt, SE Brazil by Henrique-Pinto, R., Janasi, V.A., Vasconcellos, A.C.B.C., Sawyer, E.W., Barnes, S.-J., Basei, M.A.S., Tassinari, C.C.G.

“…Detrital zircons from quartzites of the São Roque Domain were subject of studies of crystal growth and stratigraphy, using in situ LA-ICPMS trace element…”
Get full text

The composition of magmatic Ni–Cu–(PGE) sulfide deposits in the Tati and Selebi-Phikwe belts of eastern Botswana by Maier, W. D., Barnes, S.-J., Chinyepi, G., Barton, J. M., Eglington, B., Setshedi, I.

“…We studied a number of magmatic Ni–Cu–(PGE) sulfide deposits in two distinct belts in eastern Botswana. The Tati belt contains several relatively small…”
Get full text

Friction Stir Welding in HSLA-65 Steel: Part I. Influence of Weld Speed and Tool Material on Microstructural Development by Barnes, S. J., Bhatti, A. R., Steuwer, A., Johnson, R., Altenkirch, J., Withers, P. J.

“…A systematic set of single-pass full penetration friction stir bead-on-plate and butt-welds in HSLA-65 steel were produced using a range of different traverse…”
Get full text

Trace element concentrations in apatites from the Sept-Îles Intrusive Suite, Canada — Implications for the genesis of nelsonites by Tollari, N., Barnes, S.-J., Cox, R.A., Nabil, H.

“…Apatite-oxide-rich rocks (e.g. nelsonite) occur in a wide variety of rock types. Nelsonites occur in felsic and calco-alkaline granitic rocks but are more…”
Get full text

The Kunene anorthosite complex, Namibia, and its satellite intrusions; geochemistry, geochronology, and economic potential by Maier, Wolfgang D, Rasmussen, B, Fletcher, I. R, Li, C, Barnes, Sarah-Jane, Huhma, H

“…The Kunene Complex of Namibia-Angola is one of the largest anorthosite massifs on Earth (up to 18,000 km2), consisting of several distinct anorthosite and…”
Get full text

Friction Stir Welding of HSLA-65 Steel: Part II. The Influence of Weld Speed and Tool Material on the Residual Stress Distribution and Tool Wear by Steuwer, A., Barnes, S. J., Altenkirch, J., Johnson, R., Withers, P. J.

“…A set of single pass full penetration friction stir bead-on-plate and butt welds in HSLA-65 steel were produced using a range of traverse speeds (50 to…”
Get full text

Petrogenesis of contact-style PGE mineralization in the northern lobe of the Bushveld Complex: comparison of data from the farms Rooipoort, Townlands, Drenthe and Nonnenwerth by Maier, W. D., de Klerk, L., Blaine, J., Manyeruke, T., Barnes, S.-J., Stevens, M. V. A., Mavrogenes, J. A.

“…In the present study, we document the nature of contact-style platinum-group element (PGE) mineralization along >100 km of strike in the northern lobe of the…”
Get full text