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New Uncharted SP Territory, page-131

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Scubadvr

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09/04/18

17:30

Post #: 32326489
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Originally posted by mogga ↑

From our friends at earthresources

Epizonal orogenic gold

Epizonal orogenic gold deposits are most common in the western part of the Melbourne Zone and in the eastern Bendigo Zone. Most individual deposits are small. The only major known ore field of this type in Victoria is the Fosterville goldfield (at least 65 tonnes total gold) in the Bendigo Zone. Other epizonal orogenic deposits mined in Victoria contained less than 10 tonnes of gold. These include Costerfield, Nagambie, Heathcote and Bailieston. Typical grades for underground mining vary between 5 and 15 g/t gold.
Epizonal orogenic gold deposits characteristically contain submicroscopic inclusions of gold in sulphides within quartzsulphide veins and in stockworks in faults. Free gold is rarely found in unoxidised ores and gold may also be present as aurostibite (AuSb₂).
The dominant sulphides in epizonal orogenic gold deposits are usually arsenopyrite, pyrite and stibnite. The mineralogy of ores changes according to the temperature of gold deposition. Assemblages dominated by arsenopyrite and pyrite were deposited at higher temperatures (e.g. Fosterville gold mine) than ores with stibnite as the dominant sulphide (e.g. Costerfield gold mine).
Epizonal orogenic gold mineralisation forms by precipitation of gold from low-salinity fluids at depths of two to six kilometres and temperatures between 170 and 300 °C. In Victoria, these deposits are believed to have formed at around 380 Ma but, because of their low temperature of formation, the precise ages of the deposits in the Bendigo Zone are unclear. Those in the Melbourne Zone were deposited immediately after the only major deformation to have affected the zone, the Tabberabberan deformation at 380 Ma.

I guess I see the glass half full
and you see it half empty scuba

That's why I own NAG shares
and you don't

that's why the share market is so much fun

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Thats why exploration stock are much more exciting than tech stocks. The next metre of core might be the one that changes everything.

NAG Price at posting: 27.0¢ Sentiment: None Disclosure: Not Held
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New Uncharted SP Territory, page-131

Utah authorities sign off on Anson's lithium extraction plans at Green River

Week 37 Wrap: HotCopper likes Cuban oil; markets shrug debate off for Putin; firebrand quant says social media a market threat

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Enova Mining unveils "high-grade" REE drill hits at Coda North, Brazil

Olam Agri raises Namoi takeover offer to 75 cents a share and receives shareholder backing

Vulcan appoints investment bank and M&A veteran to board

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Antipa divests its Citadel interest to JV partner Rio for A$17M, refocuses on Minyari Dome

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New Uncharted SP Territory, page-131

Top Stories

Utah authorities sign off on Anson's lithium extraction plans at Green River

Week 37 Wrap: HotCopper likes Cuban oil; markets shrug debate off for Putin; firebrand quant says social media a market threat

Metals Australia kicking off plant study at Lac Carheil; Canadian tariff tailwind potential

Dale Gillham's weekly wrap: US fracking support boosts outlook for Australian gas stocks

Medallion Metals kicking off 15,000m drill run at Ravensthorpe gold play

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Olam Agri raises Namoi takeover offer to 75 cents a share and receives shareholder backing

Vulcan appoints investment bank and M&A veteran to board

Mako sniffs gold at 170 g/t at Cote d’Ivoire's Napié play

Antipa divests its Citadel interest to JV partner Rio for A$17M, refocuses on Minyari Dome

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