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Platinum-Group Element Deposits in Layered Intrusions: Recent Advances in the Understanding of the Ore Forming Processes

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Layered Intrusions

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Abstract

The major deposits of platinum-group elements (PGE) of the Earth are associated with ultramafic and mafic igneous rocks. The bulk of current PGE production is extracted from narrow stratiform horizons referred to as reefs located in the lower to central portions of large layered intrusions and is dominated by the Bushveld Complex in South Africa. The PGE-mineralized horizons occur in most case as laterally continuous and uniform layers that can extend over hundreds of kilometres along strike. The origins of these extensive PGE-rich layers remain controversial and subject to debate. Over the past ten years, technological developments have allowed the acquisition of multidisciplinary dataset at spatial resolution, detection limits and precisions that were impossible to achieve in the past. The results obtained provide additional insights into the complexity of the ores and the variability both within and between different ore deposits and highlight the necessity of adapting (for each deposit) models of formation based on all of the information available. Models of formation of PGE-reefs need to consider and integrate the superimposition of both physical and geochemical processes, over a range of scales and over a wide range of temperatures.

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Acknowledgments

James Mungall, Ian McDonald and Rais Latypov (associate editor) are thanked for their comments and suggestion that improve the quality of the manuscript. Steve Barnes, Patrick Nadoll and Ludovic Ricard are acknowledged for their suggestions during CSIRO internal review processes. This is a contribution from the CSIRO Mineral Down Under Flagship.

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    BĂ©linda Godel

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  1. University of Liège, Sart Tilman, Belgium

    Bernard Charlier

  2. University of Hannover, Hannover, Germany

    Olivier Namur

  3. University of the Witwatersrand, Johannesburg, South Africa

    Rais Latypov

  4. Aarhus University, Aarhus, Denmark

    Christian Tegner

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Godel, B. (2015). Platinum-Group Element Deposits in Layered Intrusions: Recent Advances in the Understanding of the Ore Forming Processes. In: Charlier, B., Namur, O., Latypov, R., Tegner, C. (eds) Layered Intrusions. Springer Geology. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-9652-1_9

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