Geology, Geochemistry and paragenesis of the Royal, Crown and Roses Pride low sulphidation epithermal quartz vein structures, Cracow, South-East Queensland

Braund, Kylie (2006). Geology, Geochemistry and paragenesis of the Royal, Crown and Roses Pride low sulphidation epithermal quartz vein structures, Cracow, South-East Queensland MPhil Thesis, School of Physical 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
THE19831.pdf Full Text application/pdf 75.22MB 1
Author Braund, Kylie
Thesis Title Geology, Geochemistry and paragenesis of the Royal, Crown and Roses Pride low sulphidation epithermal quartz vein structures, Cracow, South-East Queensland
School, Centre or Institute School of Physical Sciences
Institution The University of Queensland
Publication date 2006
Thesis type MPhil Thesis
Supervisor Sue Golding
Total pages 334
Collection year 2006
Language eng
Subjects L
260106 Ore Deposit Petrology
780104 Earth sciences
Formatted abstract
The early Permian Royal, Crown and Roses Pride Shoots are recent discoveries made by the Cracow Joint Venture in the Cracow Goldfield in south-east Queensland. The shoots contribute at least one million ounces of gold to the Cracow Goldfield, which more than doubles the previous inventory of approximately 850,000 ounces of gold mined between 1933 and 1993. The gold shoots are structurally controlled, within steeply dipping low sulphidation epithermal quartz vein structures that are hosted by the early Permian Camboon Volcanics, a sequence of shallow, south-westerly dipping andesitic flows, fragmentais and volcaniclastic rocks. Mining of the Royal and Crown Shoots commenced in 2005. Ongoing exploration by the Cracow Joint Venture has been successful in discovering additional gold mineralised structures such as the Sovereign, Empire, Sterling, Phoenix and Kilkenny Structures. As a result of these exploration successes, the Cracow Goldfield is emerging as a world class epithermal system.

The ongoing challenge to discover and define additional resources led to the initiation of this study, to further understand and characterise the Royal, Crown and Roses Pride Structures and the high grade gold mineralisation and to assist in effective future exploration of the Goldfield. The epithermal structures are characterised in terms of geology, multi-element geochemistry, epithermal vein textures, paragenesis, hydrothermal alteration and hydrothermal fluid geochemistry (fluid inclusion microthermometry and oxygen, hydrogen and carbon stable isotopes). Age dating constrains the age of the gold mineralisation in the context of Queensland metallogenesis. The characteristics of the Royal, Crown and Roses Pride Structures are considered relative to each other, the Cracow Goldfield and global epithermal deposits.

The significant gold depositional events in the Royal, Crown and Roses Pride Shoots occur late in the history of the epithermal quartz vein system. While four phases of veining are identified in the paragenetic sequence, the banded phase (Phase 2) and the breccia channel phase (Phase 3) contribute to the gold inventory. Principal ore and sulphide minerals include electrum, pyrite, chalcopyrite, sphalerite, galena, bomite, arsenopyrite, tetrahedrite, hessite, petzite and argentite. Gangue minerals in the epithermal veins are quartz with minor calcite, adularia and illite. Gold is very fine grained and occurs predominantly as high fineness electrum, typically within the finest grained quartz. Vein textures are.......
Keyword Gold mines and mining -- Queensland -- Cracow
Gold ores -- Geology -- Queensland -- Cracow
Geochemistry -- Queensland -- Cracow
Additional Notes Variant title: Royal, Crown and Roses Pride epithermal veins Cracow

Document type: Thesis
Collection: UQ Theses (RHD) - UQ staff and students only
 
Citation counts: Google Scholar Search Google Scholar
Access Statistics: 194 Abstract Views, 1 File Downloads  -  Detailed Statistics
Created: Fri, 24 Aug 2007, 18:58:57 EST