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
Gemstones, Minerals & Fossils
Gemstones, Minerals & Fossils
Kaolinite?
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="Hawkear" data-source="post: 643242" data-attributes="member: 4728"><p>Sounds like a good plan. My understanding is that gold is deposited from hydrothermal fluids emanating from magma chambers into neighbouring or overlying rocks. This process effectively depletes the granitic magma chamber of its gold. </p><p>if overlying rocks are eroded away their gold can then sit on top of the granite or perhaps be moved there by eons of weathering processes in adjoining (contacting) rocks.</p><p>In Victoria this has been known at Rheola where a rich field of nuggets was found in alluvium overlying a granite bedrock. Nothing was found in the granite underneath and it was assumed that the nuggets were derived from reefs in overlying Ordovician rocks long ago eroded away.</p><p>To the side of the granite surviving Ordovician rocks were found to contain rich nuggetty reefs and associated rich runs of diggings.</p></blockquote><p></p>
[QUOTE="Hawkear, post: 643242, member: 4728"] Sounds like a good plan. My understanding is that gold is deposited from hydrothermal fluids emanating from magma chambers into neighbouring or overlying rocks. This process effectively depletes the granitic magma chamber of its gold. if overlying rocks are eroded away their gold can then sit on top of the granite or perhaps be moved there by eons of weathering processes in adjoining (contacting) rocks. In Victoria this has been known at Rheola where a rich field of nuggets was found in alluvium overlying a granite bedrock. Nothing was found in the granite underneath and it was assumed that the nuggets were derived from reefs in overlying Ordovician rocks long ago eroded away. To the side of the granite surviving Ordovician rocks were found to contain rich nuggetty reefs and associated rich runs of diggings. [/QUOTE]
Verification
Post reply
Gemstones, Minerals & Fossils
Gemstones, Minerals & Fossils
Kaolinite?
Top