Climate change and the formation of nickel laterite deposits
Robert L. Thorne et al., School of Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton SO14 3ZH, UK, and CSIRO Earth Science and Resource Engineering, Australian Resources and Research Centre, Kensington, Western Australia 6151, Australia. Posted online 2 Mar. 2012; doi: 10.1130/G32549.1.
Robert Thorne of the University of Southampton and colleagues report on a study detailing the climatic conditions necessary to form nickel laterite deposits, which account for 40% of global nickel production. Combining these conditions with climatic records from Turkey and Albania has shown that the climate was most conducive to nickel laterite deposit formation in these countries between the Late Cretaceous and Middle Eocene (70 to 45 million years ago). Nickel laterites form in climates with relatively high temperatures and rainfall, which are necessary to facilitate the intense weathering of nickel-bearing ultramafic rocks exposed at the surface. The weathering of these rocks forms laterite deposits containing relatively high concentrations of nickel. The method detailed in this study could be applied to other locations worldwide to help identify new regions for mineral exploration.
Volcano- and climate-driven changes in atmospheric dust sources and fluxes since the Late Glacial in Central Europe
Gal Le Roux et al., AGEs, Department of Geology, Lige University B18, Sart-Tilman, Alle du 6 Aot, B-4000 Lige, Belgium, and EcoLab, UMR5245 CNRSUniversit de Toulouse, campus ENSAT avenue de l'Agrobiople, 31326 Castanet-Tolosan, France. Posted online 2 Mar. 2012; doi: 10.1130/G32586.1.
Atmospheric dust is an important part of the global climate system and also plays an important
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Geological Society of America