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Gold Prospecting
Metal Detecting for Gold
Difference Between Shallow Workings And Shallow Leads.
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<blockquote data-quote="user 4386" data-source="post: 643181" data-attributes="member: 4386"><p>They would commonly sink a shaft in a week. However the shallow versus deep commonly related to water and to a depth of around 30 m. Usually they would mine down to where the water became a problem then move on. Later syndicates and companies with money would come and use pumps. The old workings were called shallow leads and the later workings on the deeper extensions were deep leads. 30 m was commonly the depth limit for shallow leads (100 feet or thereabouts) - they could cope with wet ground with simple appliances, but by that depth the water commonly had too much catchment and head. It was not particularly arbitrary and was a physical distinction even made by the department of mines in those days.</p><p></p><p>This paper describes much that I find useful, like the above:</p><p></p><p>[URL unfurl="true"]https://pubs.geoscienceworld.org/segweb/segdiscovery/article-abstract/doi/10.5382/SEGnews.2004-56.fea/607614/Giant-Placers-of-the-Victorian-Gold-Province[/URL]</p></blockquote><p></p>
[QUOTE="user 4386, post: 643181, member: 4386"] They would commonly sink a shaft in a week. However the shallow versus deep commonly related to water and to a depth of around 30 m. Usually they would mine down to where the water became a problem then move on. Later syndicates and companies with money would come and use pumps. The old workings were called shallow leads and the later workings on the deeper extensions were deep leads. 30 m was commonly the depth limit for shallow leads (100 feet or thereabouts) - they could cope with wet ground with simple appliances, but by that depth the water commonly had too much catchment and head. It was not particularly arbitrary and was a physical distinction even made by the department of mines in those days. This paper describes much that I find useful, like the above: [URL unfurl="true"]https://pubs.geoscienceworld.org/segweb/segdiscovery/article-abstract/doi/10.5382/SEGnews.2004-56.fea/607614/Giant-Placers-of-the-Victorian-Gold-Province[/URL] [/QUOTE]
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Gold Prospecting
Metal Detecting for Gold
Difference Between Shallow Workings And Shallow Leads.
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