RB 85/00015 Orama Hill gold mine. Geological investigations and diamond drilling, 1983.
Published: 01 Jul 1985 Created: 06 Nov 2024 Revised: 06 Nov 2024

Orama Hill gold mine, also known as Koonamore Goldfield or Butlers Claim recorded production since 1930 of 808.89 grams of bullion. The mine is on the steeply dipping, sheared, axial plane of the Orama Hill anticline, in sandstone, siltstone and...

Orama Hill gold mine, also known as Koonamore Goldfield or Butlers Claim recorded production since 1930 of 808.89 grams of bullion. The mine is on the steeply dipping, sheared, axial plane of the Orama Hill anticline, in sandstone, siltstone and shale of Umberatana Group Wilyerpa Quartzite. Gold is associated with ferruginization and iron oxide rich pods within quartz veins which have formed in fractures and joints. Source of the gold is uncertain. However, beds with weathered sulphide spots are common in the region. Gold originally within pyrite was hydrothermally remobilized into favourable structures during the Delamerian Orogeny followed by supergene enrichment.Geological mapping, sampling (227) and 3 core holes, (117 metres) proved that localised gold mineralization is concentrated in steep ferruginous zones, averaging 30 cm thick near workings on former ML4855. However, the creek draining the western portion of the structure has been worked for alluvial gold and trenching is recommended. Results of trace element analyses to determine possible indicator elements for gold were inconclusive. However, cadmium, bismuth, antimony and lead contents tend to support a sedimentary origin for the gold.

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About this record

Record No rb8500015
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Departmental Publication - Geological Survey Geoscience Publication
Contributor
Sponsor
Tenement
Tenement Holder
Operator
Geological Province Adelaide Geosyncline
Mine Name Orama Hill Mine
Stratigraphy
Commodity
Notes
Geographic Locality: Orama Hill
Doc No: RB 85/00015

Geographic Locality: Orama Hill Doc No: RB 85/00015

Language English
Metadata Standard ISO 19115-3

Citations

Use constraints License
License Creative Commons Attribution 4.0
Persistent identifier https://pid.sarig.sa.gov.au/document/rb8500015
Citation Scott, D.C.;Flint, D.J.;Rowaihy, M.N.;Al-Tayyar, J.;Kadi, K.A. 1985. RB 85/00015 Orama Hill gold mine. Geological investigations and diamond drilling, 1983. Departmental Publication - Geological Survey Geoscience Publication. Government of South Australia.
https://pid.sarig.sa.gov.au/document/rb8500015

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[139,-32.5],[139.5,-32.5],[139.5,-32],[139,-32],[139,-32.5]]]}
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Lineage