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Tuesday, April 28, 2020 | History

3 edition of Epithermal and porphyry style gold deposits in North Queensland found in the catalog.

Epithermal and porphyry style gold deposits in North Queensland

Epithermal and porphyry style gold deposits in North Queensland

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  • 23 Currently reading

Published by Geology Dept., James Cook University of North Queensland in Townsville, Qld .
Written in English

    Places:
  • Australia,
  • Queensland.
    • Subjects:
    • Gold ores -- Geology -- Australia -- Queensland.,
    • Hydrothermal deposits -- Australia -- Queensland.,
    • Porphyry -- Australia -- Queensland.

    • Edition Notes

      Includes bibliographical references.

      Statementcompiled and edited by Gregg W. Morrison.
      SeriesBicentennial gold 88 excursion guide ;, no. 8, Contribution / Economic Geology Research Unit, James Cook University of North Queensland,, 29, Contributions of the Economic Geology Research Unit ;, contribution 29.
      ContributionsMorrison, Gregg W. 1951-
      Classifications
      LC ClassificationsTN428.A82 Q44 1988
      The Physical Object
      Pagination112 p. :
      Number of Pages112
      ID Numbers
      Open LibraryOL1902816M
      ISBN 10086443278X
      LC Control Number90104564
      OCLC/WorldCa21158668

      Quartz-adularia epithermal veins record the interplay between magmatism, tectonism, and derivative geothermal systems. At Manantial Espejo, southern Argentina, such veins form a Ag(-Au) deposit with a proven and probable reserve of Moz Ag and Moz Au. The district located in the Deseado Massif is part of the Middle to Late Jurassic Chon Aike Province, a Cited by: 8. Geology and Geochemistry of Epithermal Systems--Volume 2 of Reviews in Economic Geology--was created to accompany a Society of Economic Geologists (SEG) short course of the same name that was given in October, , prior to the annual meetings of the Geological Society of America and Associated Societies in Orlando, Florida. As was.   Great Southern Mining Ltd (ASX:GSN) has identified multiple, large epithermal gold targets at its %-owned Edinburgh Park Project in north QueenslandAuthor: Proactive Investors.


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Epithermal and porphyry style gold deposits in North Queensland Download PDF EPUB FB2

Additional Physical Format: Online version: Epithermal and porphyry style gold deposits in North Queensland. Townsville, Qld.: Geology Dept., James Cook University of North Queensland, The Jiapigou mining district (JMD) in the northeastern part of the North China Block mainly contains quartz vein- and altered rock-type gold deposits that have been prospected and mined for over.

The high-sulfidation style of epithermal deposit forms in a position transitional between the surface and a shallow degassing intrusion, in places associated with porphyry deposits. Ore bodies commonly are located proximal to volcanic vents and are hosted by structural conduits or permeable lithologies.

Epithermal and Porphyry style gold deposits in north Queensland, Econ. Geol. Res. Unit James Cook Univ. of Nth Qld Contrib., 29 (), pp. Cited by: Epithermal gold (± Cu & Ag) deposits form at shallower crustal levels than porphyry Cu -Au systems, and are primarily distinguished as low and high sulphidation using criteria o f varying gangue and ore mineralogy, deposited by the interaction of different ore fluids with host rocks and Size: 1MB.

Epithermal Gold-Silver and Porphyry Copper-Gold Exploration. Preface Chapter 1 – Introduction Chapter 2 – Alteration Chapter Epithermal and porphyry style gold deposits in North Queensland book – Structure Chapter 4 – Breccias References.

KEYNOTE ADDRESSES. Time in porphyry Cu-Au development – exploration implications PacrimAuckland, New Zealand. FOR: Australian Institute of Geoscientists North Queensland Exploration Conference JuneAIG Bulle p.

Anatomy of porphyry-related Au-Cu-Ag-Mo mineralised systems: Some exploration implications Greg Corbett Corbett Geological Services, PO File Size: 1MB.

member of porphyry deposits have also been refined, as has their possible connection with low-sulfidation alkalic epithermal systems (Jensen and Barton, ).

Other types of globally important gold deposit include low- and intermediate-sulfidation epithermal, Carlin, Au-rich VMS, and Witwatersrand type deposits (Figure 1). Epithermal deposits. You are correct regarding the depth of the two types of deposits.

Mesothermal deposits tend to be of a more concentrated vein structure and can go to great vertical depths whereas epithermal deposits tend to produce much larger deposits tonnage wise and are shallower in orientation than is a link that explains the different types of deposits.

Recognising sinters in epithermal gold deposits Surficial deposits of siliceous sinter are a com• mon feature of present-day hot springs in areas of active volcanism, but they are rarely recognised in older, eroded volcanic ter• ranes because of their low preservation poten• tial, and their limited vertical and lateralFile Size: 7MB.

High Sulphidation Gold Deposits - A Summary relation to epithermal mineralization in the North Arm Volcanics, southeast Queensland. epithermal style. Epithermal gold deposits are among the richest gold deposits in the world with some bonanza grade ore shoots containing more than g/t gold, or in other words, a kilogram of gold for every tonne of rock mined.

Unfortunately, the tonnage of ore in epithermal veins is typically small compared with other types Author: David Tilley. content and descriptions of ore deposits Porter GeoConsultancy, continued its International Study Tour series of professional development courses during May by visiting a representative selection of the different styles, and the most important examples, of epithermal gold deposits on the western margin of the Pacific.

Epithermal and porphyry style gold deposits in North Queensland book This special issue is devoted to alkalic porphyry Cu-Au and epithermal Au deposits and focuses on two regions: British Columbia, Canada (Fig. 1), and the Southwest Pacific region (Australia and Papua New Guinea: Fig.

2).Cited by: Skarn deposits are also zoned in this mineral system, with Cu-rich skarns generally very close to the causative intrusion, but Zn-Pb-rich skarns more distal.

An important feature of the porphyry-epithermal mineral system is the telescoping of different deposit types, for instance porphyry Cu-Au-Mo deposits and epithermal deposits of various types. And here is a spectacular exposure of a porphyry and epithermal pair in Southern Java.

The porphyry intrusion outcrops as a small, steep island on the right of the image and a genetically related high sulfidation epithermal deposit curves on the mainland on the left of the image.

progression of classification of gold deposits related to magmatic rocks as commencing with the term porphyry gold deposits (after the usage of porphyry copper deposits) in by Hollister. This ignores the fact that Sillitoe () had earlier introduced the concept of a porphyry gold deposit Size: KB.

The Miocene Wafi-Golpu gold-rich porphyry Cu-Au deposit, and associated epithermal Au mineralisation is located in the Morobe Province of PNG, and has a currently published resource of million ounces of gold, million tonnes of copper and million ounces of silver (Newcrest, ; Harmony, ).

This district contains many deposits and >20 Moz of identified gold (Fig. This trip will visit the Mt Carlton area, the Ravenswood-Mt Wright area and the Pajingo area, near Charters Towers.

The participants will have the opportunity to inspect epithermal and porphyry type deposits with features unusual for such types of deposits. Epithermal Gold Deposits Part II Geology and Gold Deposits of the Oatman District, Northwestern Arizona By Ed DeWitt, Jon P.

Thorson,1 and Robert C. Smith2 Abstract Mines in the Oatman mineralized district, near Oatman in northwestern Arizona, have produced more than million ounces of gold from mid-Tertiary, epithermal, silver-File Size: 2MB.

epithermal gold-silver deposits in the northern Great Basin (north of latitude 37°30'N). The focus is on variations in the composition, tectonic setting, and eruptive style of the Miocene to early Pliocene magmatic assemblages and how these variations may have influenced the types and character-istics of epithermal gold-silver deposits formed.

Great Southern Mining Ltd has identified multiple, large epithermal gold targets at its %-owned Edinburgh Park Project in north Queensland following receipt of. Newcrest Mining Limited, Level 2, Coronation Drive, Milton, QLD Key words: gold, epithermal, Klondyke, Royal Shoot, Cracow.

Abstract. The recent discovery of high-grade epithermal gold mineralisation at Cracow in south-east Queensland has resulted from targetted area selection, persistence in exploration and continued management support.

Controls to low sulphidation epithermal Au-Ag mineralisation Structural controls to Porphyry Cu-Au and Epithermal Au-Ag deposits in Applied Structural Geology for Mineral Exploration, Australian Institute of Geoscientists Bulle p.

Corbett, G.J.,Epithermal and porphyry gold – Geological models in Pacrim Congress The Walsh River project is located in the Hodgkinson Province in North Queensland and is within the Chillagoe Mining Field where known porphyry and skarn-related gold-copper-silver mineralisation has a mineral inventory in excess of Moz gold.

Simple Rules of Gold Geology: Comparing Epithermal and Mesothermal Deposits. July by Chris Ralph. Geology is a science of general tendencies with frequent exceptions, not one of hard and fast rules that are always true and never vary.

For almost every well-accepted rule of gold deposits, I can point you to a number of important exceptions. Ore deposits: Classification vs Modeling Each ore deposit is unique like a person’s finger print This uniqueness arises out of: ¾fundamental differences in processes and environments ¾local, site-specific geologic variations And produces an extremely large variation in characteristics ¾If we group the deposits according to their characteristics, we get a.

The Cadia "wallrock-porphyry" - style gold-copper deposit NSW; Newcrest Mining staff -in Porphyry related copper and gold deposits of the Asia Pacific Region, Conf.

Proc., Cairns, Aug.,AMF, pp. Bendigo. Mineralogical, fluid inclusion, and geochemical studies of precious metal mineralization within the Baimka trend in the western Chukchi Peninsula have been preformed. Porphyry copper–molybdenum–gold deposits and prospects of the Baimka trend are spatially related to monzonitic rocks of the Early Cretaceous Egdygkych Complex.

Four types of Cited by: 9. Eleven gold‐rich porphyry copper and 14 epithermal gold deposits around the Pacific rim contain > t (‐7 million oz) of gold. These large porphyry‐type deposits conform to a single overall model, whereas the large epithermal gold deposits are varied in both genetic type and mineralisation by: Pentland Gold Project.

The Pentland Gold Project is a large land holding with all tenements in good standing. The project contains five established prospects where ActivEX has carried out extensive ground-based surveys and these areas are drill-ready with a number of targets already identified.

Outside of these areas, the project package is only lightly explored and significant. Epithermal % % % % % % Skarn 3 % % % Massive sulphide 4 5 Sedex Volcanogenic database of over 1, porphyry-style mineral occurrences.

Roughly 60 of these have gold resource estimates. Significant Selected Gold Deposits in British Columbia B.C. Gold Deposits Million oz Au Grade g/t KSM Snowfield Prosperity.

Gold from Lebong Tandai Drillcore, Epithermal Gold Deposits A very important style of gold deposit Can be very big: Lihir, PNG Mt @ g/t Au ( t or Moz Au) Porgera, PNG 85 Mt @ g/t Au, 33 g/t Ag ( t or Moz Au & 2, t Ag) Can be very rich: Cripple Creek, USA t Au in veins grading 15 to 30 g/t Hishikari 5/5(19).

To the north of Clark Hills, sporadic basement outcrop is again encountered. In this case (Clark Hills North prospect), epithermal-style quartz veining in granite host is noted in several outcrops trending NW-SE.

An initial sample of quartz material returned an assay of ppm Au (Broadbent, ). Geophysical signatures of copper-gold porphyry and epithermal gold deposits, and implications for exploration Download Statistics Hoschke, TG'Geophysical signatures of copper-gold porphyry and epithermal gold deposits, and implications for exploration', Research Master thesis, University of Tasmania.

by: 8. Epithermal deposits are a type of lode contain economic concentrations from a precious metal such as gold and silver, and in some cases base metals such as. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Alkalic gold-(copper) deposits are of increasing economic significance and are an attractive exploration target.

They include some of the world’s highest grade and largest porphyry-related. Sillitoe, R.H. () Characteristics and Controls of the Largest Porphyry Copper-Gold and Epithermal Gold Deposits in the Circum-Pacific Region. Australian Journal of Earth Sciences, 44, has been cited by the following article.

situ measurements of porphyry copper deposits Cross-section of alteration zones characteristic of high-sulphidation deposits Diagram of hypothetical low sulphidation epithermal gold deposit to illustrate the effect of erosion level on geophysical responses Batu Hijau geology, sulphide content, alteration, and RTP magnetics.

For both porphyry and epithermal gold deposits, they are generally from the time period ranging from the middle Miocene to the Recent period., however notable exceptions are known. Most large-scale porphyry deposits have an age of fewer than 20 million years., [7] however there are notable exceptions, such as the million-year-old Cadia.

Gold-silver ores in epithermal deposits: a compilation and Yun, S.-T. --Evolution of an intrusion-centred hydrothermal system: Far Southeast-Lepanto porphyry and epithermal Cu-Au deposits, Philippines R., and Sillitoe, R.H. --Application of quartz textures to the classification of gold deposits using north Queensland.Gold Deposit Porphyry Copper Porphyry Copper Deposit Skarn Deposit Breccia Pipe These keywords were added by machine and not by the authors.

This process is experimental and the keywords may be updated as the learning algorithm by: 'Carlin-type' deposits, i.e., disseminated fine-gold deposits hosted by car- bonaceous calcareous sediments, are described commonly as 'sediment-hosted', but this term fails to convey that a particular type of deposit, hosted by very EPITHERMAL ENVIRONMENTS AND STYLES OF MINERALIZATION specific sediments, is referred by: