Palaeozoic geology and ore genesis of the Talgai, Thanes Creek and Leyburn goldfields

Waring, Christopher Leslie (1981). Palaeozoic geology and ore genesis of the Talgai, Thanes Creek and Leyburn goldfields B.Sc Thesis, School of Earth Sciences, The University of Queensland.

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
THE2408.pdf Full text application/pdf 21.78MB 3
Author Waring, Christopher Leslie
Thesis Title Palaeozoic geology and ore genesis of the Talgai, Thanes Creek and Leyburn goldfields
School, Centre or Institute School of Earth Sciences
Institution The University of Queensland
Publication date 1981-05
Thesis type B.Sc Thesis
Supervisor G.E.G. Sargent
Total pages 280
Language eng
Subjects L
260100 Geology
Formatted abstract

The contiguous Talgai, Thanes Creek and Leyburn Goldfields together form a large area (500 km2) which covers the north-eastern Texas Beds, in south-east Queensland. This large area was mapped in order to study the regional sedimentological and tectonic history. Detailed mapping of the Talgai Mining Reserve reveals the lithological and structural setting for the major gold mines.

Both a detailed and generalized review of the history, workings and production record (25000 oz estimated total lode gold produced) for the mines is provided. Style of mineralization, wall-rock alteration, and the geophysical and geochemical responses of the veins are discussed.

The host rocks for the auriferous quartz veins are couunonly quartz-poor volcanolithic greywackes, black slates and cherts. Siltstones, spilitic volcanics and sheared andesitic? pyroclastic rocks are also present in the very thick sequence.

It is determined that an intermediate to deep water marine turbidite fan was operative during the Devonian Carboniferous. The proposed sediment provenance area is the Silverwood Volcanic Arc, which lies to the east of the three goldfields. Field associations indicate that following a deformation period (late Carboniferous) in which the Texas Beds were tightly folded and faulted, the Permo-Triassic Greymare trondhjemite and Allandale Dyke Swarm were emplaced along the southern and eastern margins of the studied area.

Using oxygen isotope, fluid inclusion and thermochemical data, together with observed geological associations and vein distribution patterns, a genetic mechanism is proposed for the auriferous lodes. This involves the release of gold into a hot (>3SOOC) brine during the synchronous regional metamorphism and deformation of the thick volcaniclastic sedimentary pile. Gold, quartz and sulphides are subsequently deposited in cooler near-surface fractures.

Keyword Gold mines and mining -- Queensland, Southeastern
Geology -- Queensland, Southeastern
Geology, Stratigraphic -- Paleozoic
Additional Notes Other Title : Talgai goldfield

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
Citation counts: Google Scholar Search Google Scholar
Created: Thu, 10 Apr 2014, 13:33:23 EST by Mr Chinh Nguyen on behalf of Scholarly Communication and Digitisation Service