Magmato-hydrothermal space: A new metric for geochemical characterisation of metallic ore deposits |
| |
| Institution: | 1. Centre for Exploration Targeting, University of Western Australia, 35 Stirling Highway Crawley, Perth, Western Australia 6009, Australia;2. Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, N2L 3G1, Canada;1. Zavaritsky Institute of Geology and Geochemistry of the UB RAS, 7 Pochtovy per, Yekaterinburg 620075, Russia;2. V.S. Sobolev Institute of Geology and Mineralogy of the SB RAS, 3, Koptyuga prosp., Novosibirsk 630090, Russia;3. Novosibirsk State University, 2, Pirogova st., Novosibirsk 630090, Russia;4. Institute of Experimental Mineralogy RAS, 4, Acad. Osipian st., Chernogolovka, Russia;5. Centre for Exploration Targeting, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;1. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;2. Key Laboratory of Orogen and Crustal Evolution, Peking University, Beijing 100871, China;3. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 46 Guanshui Road, Guiyang 550002, China;1. Institute for Geology, TU Bergakademie Freiberg, Bernhard-von-Cotta-Straβe 2, 09599 Freiberg, Germany;2. Czech Geological Survey, Klárov 3, 118 21 Prague 1, Czech Republic;3. Saxon State Office for Environment, Agriculture, and Geology, Halsbrücker-Straβe 31A, 09599 Freiberg, Germany;4. Institute for Mineralogy, TU Bergakademie Freiberg, Brennhausgasse 14, 09596 Freiberg, Germany |
| |
| Abstract: | “Magmato-Hydrothermal Space” is a new mathematical construct where 24 ore and pathfinder elements are used to quantify ore-element signatures. Quantification allows relationships between ore deposit samples to be mapped. The broad-scale view of Magmato-Hydrothermal Space reveals three important trends: (1) Zn-Pb sediment-hosted mineralisation to igneous-associated Cu-Au mineralisation, (2) Cu-Au mineralisation to Au-only mineralisation, and (3) ultramafic associated magmatic Ni-Cu-PGE mineralisation through Cu-Au mineralisation to granitoid-associated Mo, W and Sn mineralisation. The view provided by Magmato-Hydrothermal Space reveals that there is a spectrum of ore element signatures that mirrors the spectrum of ore deposit classes described in the literature.Geochemical variations within individual ore deposit classes are examined for orogenic-Au, VHMS, epithermal and sediment-hosted Cu samples. Sub-groups within each of these classes are compared on element enrichment diagrams and described in the context of Magmato-Hydrothermal Space. Orogenic Au samples are divided into two sub-groups of As-Sb rich mineralisation and four sub-groups of relatively As-Sb poor mineralisation. The As-Sb poor sub-groups include a Te-Cu-Ag rich sub-group that overlaps with the porphyry Cu class and a Te-W-(Bi-Mo) rich class dominated by granitoid hosted deposits. The VHMS class ranges from a Cu-rich sub-group that overlaps with porphyry Cu and IOCG classes through a Cu-Zn sub-group to two Zn-Cu sub-groups, one of which overlaps with the SHMS class. The epithermal class is divided into Zn-rich, Cu-rich and base metal – poor sub-groups. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
