Authors / CoAuthors
Firman, J.B.
Abstract
<p>The Redbank Copper deposits occur in the Gold Creek Volcanics, a formation approximately 250 feet thick, which contains interbedded volcanic flow-rocks, pyroclastics, and sedimentary rocks deposited in a shallow-water environment. The volcanic rocks show hydrothermal alteration which is best developed adjacent to the ore-bodies. Fine-grained volcanic rocks and coarse-grained sedimentary rocks contain the most extensive mineralization. <p>The sedimentary rocks are essentially flat with a slight overall dip to the north-west. Steeply dipping, ill-defined faults which are present in the workings may have served as channelways for the original ore-bearing solutions. Secondary copper minerals are localized within suitable host-rocks or at the intersection of the steeply dipping faults with fine-grained volcanic flow-rocks or coarse-grained sedimentary rocks. <p>The deposits are characterized by the copper minerals malachite, dihydrite, azurite, chrysocolla and chalcocite, by the paucity of gangue minerals and by the absence of sulphide minerals other than chalcocite. It is suggested that they are the oxidized zones of epigenetic, epithermal sulphide deposits. <p>Known deposits are of sufficiently high-grade, but are too small for economic development at a company level. Successful exploitation may depend upon the discovery of other ore-bodies by geophysical survey and by exploratory drilling and shaft sinking.
Product Type
document
eCat Id
10478
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
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2601
Australia
Keywords
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- GA PublicationRecord
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- AU-NT
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
Publication Date
1959-01-01T00:00:00
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unknown
Topic Category
geoscientificInformation
Series Information
Record 1959/048
Lineage
Legacy product, lineage not available
Parent Information
Extents
[-17, -16.5, 137, 137.5]
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Spatial Resolution
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Legacy product, source data not available.