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
Hard Rock Gold Prospecting
Can you help? Blue / grey shale / slate with pyrite / sulfides
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="Dreamwalking" data-source="post: 214982" data-attributes="member: 3389"><p>It looks to me to be most likely a banded fine-grained pyrite in shale and very likely formed in Precambrian times. Pyrite is common in many hydrothermal veins, shales, coals, various metamorphic rocks, and massive sulfide deposits. These sulphides originated as mentioned by Stalker whilst Australia was 80% submersed beneath the ocean, eventually in the drying stages the sulfate source becomes evaporitic gypsum which when subjected to metamorphism ( compression and heat ) created the pyrite crystals. The coloured bands are more so due sedimentary deposits of different particles sizes deposited during erosion ... same as when you are panning off ... the amount of force (water flow) determines the size and weight of your residue.</p></blockquote><p></p>
[QUOTE="Dreamwalking, post: 214982, member: 3389"] It looks to me to be most likely a banded fine-grained pyrite in shale and very likely formed in Precambrian times. Pyrite is common in many hydrothermal veins, shales, coals, various metamorphic rocks, and massive sulfide deposits. These sulphides originated as mentioned by Stalker whilst Australia was 80% submersed beneath the ocean, eventually in the drying stages the sulfate source becomes evaporitic gypsum which when subjected to metamorphism ( compression and heat ) created the pyrite crystals. The coloured bands are more so due sedimentary deposits of different particles sizes deposited during erosion ... same as when you are panning off ... the amount of force (water flow) determines the size and weight of your residue. [/QUOTE]
Verification
Post reply
Gold Prospecting
Hard Rock Gold Prospecting
Can you help? Blue / grey shale / slate with pyrite / sulfides
Top