Geochemical and electron paramagnetic characteristics of quartz from a multi-stage vein environment, Cowarra gold deposit, New South Wales |
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| Authors: | K G McQueen Aung Pwa J C van Moort |
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| Institution: | 1. Laboratório de Instrumentação e Simulação Computacional. LISCOMP/IFRJ-CPAR, 26600-000 Paracambi, Brazil;2. Museu Nacional (MN-UFRJ) Quinta da Boa vista, São Cristóvão, RJ 20940-040, Brazil;3. Centro Federal de Educação Tecnológica Celso Suckow da Fonseca – Uned-NG, 26041-271 Nova Iguaçu, Brazil;4. Instituto de Física Armando Dias Tavares (IFADT-UERJ), Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, RJ 20550-013, Brazil;1. CAS Key Laboratory of Crust–Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;2. College of Earth Science, Guilin University of Technology, Guilin 541004, China;3. CAS Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, The Chinese Academy of Sciences, Guangzhou 510640, China |
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| Abstract: | The characterisation of quartz using trace element geochemistry and electron paramagnetic resonance measurements has been tested for different generations of quartz veining in the multi-stage hydrothermal vein system at Cowarra. Quartz closely associated with gold mineralisation can be distinguished from earlier and later quartz generations in the mineralised environment, and both types can be distinguished from regional, barren quartz veins. These separate stages of quartz veins are also recognised from their fluid inclusion characteristics. Geochemical differences in the quartz partly reflect the presence of minor mineral inclusions, particularly sulfides and arsenopyrite.The study highlights the importance of understanding the paragenetic sequence of quartz vein development in a mineralised environment and the need for careful, thorough sampling before attempting geochemical and EPR characterisation of quartz as an exploration technique. |
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| Keywords: | electron paramagnetic resonance exploration inclusions mesothermal gold deposit vein quartz |
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