cr121313
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https://geoscience.data.qld.gov.au/dataset/cr121313
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A review of the considerable historic data and addition of radiometric dating and
interpretation of multi-element geochemistry has provided a detailed interpretation of the
mineralised system. The Mt Turner mineralised area is a 6 km diameter magmatic-
hydrothermal system with an early NNE- trending rhyolite dike swarm with potassic and
sericitic alteration and Cu mineralisation. A second phase of intrusion is a widespread set of
micro- granodiorite plugs with local dykes and breccias and potassic-sericitic alteration that
coincide with all the significant prospects with Cu-Mo and As- Pb-Zn-Cu-Ag-Au veins.
The historical multi-element geochemistry demonstrates that the mineralized prospects are
all part of the same system with an As- Bi-Te-Au-Ag-Cu-Pb-Zn signature and an inbuilt zoning
pattern from Cu-Mo to Cu-As-Sb-Au-Bi to Pb-Zn-Ag- (Au) that is characteristic of the Permo-
Carboniferous porphyry systems in the district.
The copper halo around the Mt Turner intrusive forms an arcuate crescent 500 to 1000m to
the west and northwest of the intrusive centre, whereas the molybdenum anomaly is to the
east and south east and closer to the intrusive centre. Molybdenum also forms a complete
halo around the flow banded rhyolite breccia 1000m east of the intrusive centre.
Gold associated with the Mt Turner intrusive complex is only manifest on the periphery of the
system at Red & Balaclava Hill 3,000m to the northeast and Mountain Creek, 3,000m to the
southwest (outside the Mount Turner property). The gold occurs in thin quartz veins within
Permo- Carboniferous breccia plugs and rhyolite dykes and is considered to be epithermal
mineralization associated with the intrusive system.
The Drummer Fault mineralization is thought to be an Early Devonian east-west structure
displaying dextral movement. It has an As-Au-Ag-Pb signature and may in fact display later
Carboniferous epithermal gold and silver overprint signatures related to the regional
mineralizing event that generated the Mount Turner intrusive complex. Several other large
fault structures striking north-south are also present within the property and these also host
significant gold-silver-base metal occurrences that are probably related to the high level
Permo-Carboniferous intrusives.
Ismins concludes that the historical drilling undertaken at the Mount Turner porphyry
copper-molybdenum prospect has been barely tested by drilling, much of which has been
shallow. The copper target as outlined by the KGM soil geochemistry has not been tested by
drilling and nor has the molybdenum halo around the eastern rhyolitic breccia.
提供机构:
geological-survey-of-queensland
创建时间:
2025-11-30



