Browsing Geology by UP Author "Dixon, Roger D."

Browsing Geology by UP Author "Dixon, Roger D."

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  • Distinguishing between legally and illegally produced gold in South Africa 
    Roberts, R.J. (James); Dixon, Roger D.; Merkle, R.K.W. (Roland Karl Willi), 1954- (American Academy of Forensic Sciences (AAFS), 2016-01)
    The identification of gold-bearing material is essential for combating the theft of gold in South Africa. Material seized in police operations is generally a mixture of gold from different mines, and as such cannot be ...
  • Geochemical identification of episodes of gold mineralisation in the Barberton Greenstone Belt, South Africa 
    Altigani, M.A.H.; Merkle, R.K.W. (Roland Karl Willi), 1954-; Dixon, Roger D. (Elsevier, 2016-06)
    The morphology and mineral chemistry of gold and associated sulphides at Sheba, Fairview, and New Consort gold mines in the Barberton Greenstone Belt (BGB) identify two main types of mineralization. The first type ...
  • Global developments in forensic geology 
    Di Maggio, Rosa Maria; Donnelly, Laurance J.; Al Naimi, Khudooma Saeed; Barone, Pier Matteo; Da Silva Salvador, Fabio Augusto; Dawson, Lorna; Dixon, Roger D.; Fitzpatrick, Rob; Gradusova, Olga; Nesterina, Ekaterina; Peleneva, Marina; Ushacova, Olga; Gallego, Carlos Martin Molina; Pirrie, Duncan; Rufell, Alastair; McKinley, Jennifer; Sagripanti, Gullermo; Villalba, Diego; Schneck, Bill; Sugita, Ritsuko; Wach, Grant; Silva, Ricardo; Forbes, Shari (International Union of Geological Sciences, 2017-06)
    Forensic geology has developed in each country dependent on the history, political and social setting, anthropological influences and geology. The aim of this section is to provide a global overview of forensic geology, ...
  • Material mixing in shock-induced pseudotachylites, Vredefort impact structure, South Africa 
    Kovaleva, Elizaveta; Huber, Matthew S.; Dixon, Roger D. (Elsevier, 2020-10)
    Impact-generated pseudotachylites (PTs) have been extensively studied in the Vredefort Impact Structure, South Africa, and have been shown to correspond chemically and isotopically to their host rocks. Such melts are ...
  • Properties of impact-related pseudotachylite and associated shocked zircon and monazite in the upper levels of a large impact basin : a case study from the Vredefort impact structure 
    Kovaleva, Elizaveta; Dixon, Roger D. (MDPI, 2020-11-25)
    The Vredefort impact structure in South Africa is deeply eroded to its lowermost levels. However, granophyre (impact melt) dykes in such structures preserve clasts of supracrustal rocks, transported down from the uppermost ...
  • The role of forensic geology in the illicit precious metals trade 
    Dixon, Roger D.; Schouwstra, Robert (International Union of Geological Sciences, 2017-06)
    The proceeds of the illicit trade in precious metals are used as currency to pay for, for example, other illicit goods and support terrorism. Precious metals are often mined in less developed countries and exported to ...