Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Charts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Gold Prospecting
Metal Detecting for Gold
Difference Between Shallow Workings And Shallow Leads.
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Prospecting Australia:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="Northeast" data-source="post: 485141" data-attributes="member: 8209"><p>Goldierocks wrote:</p><p></p><p><strong>"However the term shallow lead is applied to anything up to about 30 m deep"</strong> I always wondered that, thanks :Y: </p><p></p><p><strong>"Now the first prospectors came along and initially find gold at or within tens of centimetres of surface in the upper parts of gullies and in soil around the reef. As they mine the gravels down the gully, they can initially access all the gravel by trenching etc, and turn everything over with picks and shovels, but as gold-bearing gravel gets deeper farther down the gully, they have to dig shafts at intervals to get through unmineralised clay, sand and sometimes barren gravel to get to the deeper gravel on bedrock that these other rocks conceal. They then go down their shafts and tunnel in the gold-bearing gravels between their shafts. Gradually the shafts have to get deeper to access the gold, and more expensive in time and money, so they dig shafts further apart and make the tunnels between their shafts longer (and often more dangerous because they were tunnelling entirely through wet unconsolidated gravel for long distances). They would now be said to be working a shallow lead. Often this was in areas of topographically lower relief (flattish areas - although sometimes later earthquakes uplift these flattish areas and new gullies start to form in them and erode the old gold-bearing gravels)."</strong> It was all interesting. Found this section particularly so. </p><p></p><p>Thanks for your explanations <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="Northeast, post: 485141, member: 8209"] Goldierocks wrote: [b]"However the term shallow lead is applied to anything up to about 30 m deep"[/b] I always wondered that, thanks :Y: [b]"Now the first prospectors came along and initially find gold at or within tens of centimetres of surface in the upper parts of gullies and in soil around the reef. As they mine the gravels down the gully, they can initially access all the gravel by trenching etc, and turn everything over with picks and shovels, but as gold-bearing gravel gets deeper farther down the gully, they have to dig shafts at intervals to get through unmineralised clay, sand and sometimes barren gravel to get to the deeper gravel on bedrock that these other rocks conceal. They then go down their shafts and tunnel in the gold-bearing gravels between their shafts. Gradually the shafts have to get deeper to access the gold, and more expensive in time and money, so they dig shafts further apart and make the tunnels between their shafts longer (and often more dangerous because they were tunnelling entirely through wet unconsolidated gravel for long distances). They would now be said to be working a shallow lead. Often this was in areas of topographically lower relief (flattish areas - although sometimes later earthquakes uplift these flattish areas and new gullies start to form in them and erode the old gold-bearing gravels)."[/b] It was all interesting. Found this section particularly so. Thanks for your explanations ;) [/QUOTE]
Verification
Post reply
Gold Prospecting
Metal Detecting for Gold
Difference Between Shallow Workings And Shallow Leads.
Top