David R. Cooke

Chlorite chemistry as a tool to classify ore deposits: Global compilation and application to the Tennant Creek Au-Bi-Cu deposits

Damian Braize, Jeffrey A. Steadman, Sébastien Meffre, Baker et autres

• Chlorite chemistry reveals distinct signatures across ore deposit types. • Principal Component Analysis classifies chlorite by deposit type. • Host-rock normalization improves chlorite-based classification accuracy. • Tennant Creek chlorite confirms IOCG affinity. Minerals belonging to the chlorite mineral group commonly form …

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Variations in White Mica Chemistry at the E26 Porphyry Cu-Au Deposit, NSW, Australia

Rhiannon Jones, David R. Cooke, Lejun Zhang, A Escolme et autres

Abstract Spatial variations in white mica chemistry can be a valuable tool for exploration in the proximal porphyry environment. However, the successful application of white mica as a vectoring tool requires a detailed paragenetic framework. At the E26 alkalic porphyry Cu-Au deposit …

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Anatomy of a Moderately Telescoped Porphyry–High-Sulfidation System: Insights of a 2 km Vertical Profile of Alteration and Mineralization at Valeriano Cu-Au ± Mo Deposit, Chile

Jaime Osório, David R. Cooke, Ivan A. Belousov, Lejun Zhang et autres

Abstract The Valeriano Cu-Au ± Mo deposit is located at the northern end of the El Indio metallogenic belt in the Chilean Central Andes, a region well-known for its prolific Au-Ag high-sulfidation epithermal deposits. In the past decade, deep drilling beneath the …

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A Letter from the Editor

David R. Cooke

Metal scavenging by sulfide oxidation in porphyry copper deposit root zones

Shiwei Wang, Taofa Zhou, Michael Anenburg, Pete Hollings et autres

Abstract Porphyry copper (-gold) deposits in both arc and non-arc settings are hosted by oxidized magmatic rocks, but the exact mechanism by which the source magmas of these non-arc deposits become oxidized remains obscure. Through whole-rock geochemistry, mineral chemistry, and zircon isotopic …

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Co-disposal of wood ashes and mine wastes to control acid and metalliferous drainage

Annah Moyo, Anita K. Parbhakar-Fox, Sébastien Meffre, David R. Cooke

Remediating acid and metalliferous drainage (AMD) by co-disposing wood ashes with sulfidic mine wastes can be an environmentally sustainable option. This study evaluated the potential environmental performance of wood bed and fly ashes placed with six legacy mine waste samples from Tasmania. …

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The GRE46 Epithermal Gold Deposit, Cowal, New South Wales: Geology, Mineralization, Alteration, and Ore Genesis

Markus Staubmann, David R. Cooke, Scott Halley, Tilen Milojkovic et autres

Abstract The 2.74 Moz structurally controlled epithermal GRE46 gold deposit is located on the western margin of the Cowal Igneous Complex in central New South Wales, Australia. At the regional scale, the Cowal Igneous Complex is located toward the southern end of …

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Mineralogical and geochemical characterization of mine tailings in the King river delta, Western Tasmania: Implications for long-term stability of trace elements

Sibele C. Nascimento, David R. Cooke, Matthew J. Cracknell, Clare B. Miller et autres

Nearly a century of mining activities at the Mount Lyell Cu-Zu-Au mine has resulted in the accumulation of ∼14 Mt of fine-grained tailings at the mouth of the King River, Western Tasmania. The tailings consist primarily of sulfides ( i.e., pyrite, chalcopyrite, …

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The Cascabel Porphyry Cu-Au-Ag District, Northern Ecuador

Carlos Díaz Castro, David R. Cooke, Ivan A. Belousov, Santiago Vaca et autres

Abstract The Cascabel Cu-Au-Ag porphyry cluster is part of the Eocene metallogenic belt of the northern Western Cordillera of Ecuador, and formed during east-directed, low-angle subduction and eastward migration of the Macuchi arc. Cascabel is part of the Imbaoeste mining district, a …

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An accelerated kinetic leach test for geochemical and environmental characterisation of acid and metalliferous drainage

Annah Moyo, Anita K. Parbhakar-Fox, Sebastien Meffre, David R. Cooke

A new bench scale accelerated kinetic leach column (KLC) test was developed to assess the acid and metalliferous drainage (AMD) potential of six historic mine wastes from Tasmania, Australia. Preliminary geochemical static tests evaluated three of the samples as potentially acid-forming (PAF) …

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Tourmaline Mineral Chemistry: A Fertility Assessment and Vectoring Tool for Mineral Exploration in Magmatic-Hydrothermal Ore Systems

Wei Hong, Francisco Testa, David R. Cooke, Nathan Fox et autres

Abstract Tourmaline is a structurally and chemically complex hydrous borosilicate mineral that displays significant compositional variability in both major and trace elements. Its occurrence in a wide variety of ore-forming systems makes tourmaline a powerful provenance indicator because it can record the …

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Trace element compositions of micro inclusions extracted from mixed LA ICPMS signals and their use in exploration

Ivan A. Belousov, Axel Cima, Leonid V. Danyushevsky, David R. Cooke et autres