Geological and Atmospheric Sciences
Journal or Book Title
Application of indicator mineral methods to bedrock and sediments
Exploration '17 Decennial conference
October 22, 2017
The presence of resistate indicator minerals (e.g. garnet, gahnite, magnetite, Cr diopside, ilmenite, olivine, and gold) in surficial sediments (e.g. glacial, eolian, stream, alluvial, beach, and residual soils) and bedrock have been used to explore for various types of mineral deposits, including porphyry Cu, lode gold, magmatic Ni-Cu-PGE, metamorphosed volcanogenic massive sulphide (VMS), rare metals, and iron oxide-coppergold (IOCG) (Averill, 2001, 2007; McClenaghan, 2005, 2013). Optical- and electron- (e.g. scanning electron microscope coupled with QEMSCAN® or MLA™ software, electron microprobe analysis (EMPA), and mass spectrometry (e.g. laser ablationinductively coupled plasma-mass spectrometry (LAICP- MS)) based techniques are used to identify indicator minerals, with EMPA and LA-ICP-MS techniques being able to determine their major and trace element compositions (e.g. Layton-Matthews et al., 2013). Laser ablation-inductively coupled plasma-mass spectrometry allows for the measurement of many elements at concentrations as low as parts per billion (e.g. Jackson et al., 1992).
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Spry, Paul G.; Pollock, M. V.; Tott, K. A.; Koenig, A. E.; Both, R. A.; and Ogierman, J. A., "Trace element chemistry of indicator silicates and oxides as vectors to metamorphosed sediment-hosted Pb-Zn-Ag and Cu-Au deposits in the Cambrian Kanmantoo Group, South Australia" (2017). Geological and Atmospheric Sciences Conference Presentations, Posters and Proceedings. 11.