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Gemstones, Minerals & Fossils
Gemstones and Minerals
Sapphire Formation and Deposit Theory
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<blockquote data-quote="Heatho" data-source="post: 71158" data-attributes="member: 487"><p>In places like Inverell you could pretty much dig a hole straight down anywhere between there and Glen Innes and find Sapphires though the overburden in some places is way too deep. Other places there it's between say 30cm and 5-6m down, though they can be found anywhere between the surface and bedrock but are concentrated on the decomposing bedrock among the Billy Boulders. There are areas of Basalt caps where there would have to be good Sapphire beneath but probably too expensive to remove it.</p><p></p><p>Dry sieving in the dust up there even smells volcanic and ashy. The dust is Grey and almost as fine as Bulldust. The deposits up there are massive but same as anywhere they seem to concentrate in certain spots, certain colours also only seem to come in certain sizes. I'll take some pics of different layers down to bedrock next time. Just wandering around up there you are likely to find nice stones, they can be sitting anywhere even nowhere near the creek. Could even be really good specking around the higher terraces at places like GG BS and PR after rain.</p><p><a href="https://www.prospectingaustralia.com/forum/viewtopic.php?id=2906&p=3" target="_blank">https://www.prospectingaustralia.com/forum/viewtopic.php?id=2906&p=3</a></p><p>In my Inverell thread you can see what's going into the washplant and it's the Grey Volcanic ashy stuff with small boulders and a bit of Clay. Also at the wash tub area you can see the view behind is pretty flat, that is all flood plain of Frazers Creek, the Creek has probably changed course numerous times over that floodplain over 100 000 years, totally different to GG, being so flat, GG is a very hilly area.</p><p></p><p>All very interesting stuff.</p></blockquote><p></p>
[QUOTE="Heatho, post: 71158, member: 487"] In places like Inverell you could pretty much dig a hole straight down anywhere between there and Glen Innes and find Sapphires though the overburden in some places is way too deep. Other places there it's between say 30cm and 5-6m down, though they can be found anywhere between the surface and bedrock but are concentrated on the decomposing bedrock among the Billy Boulders. There are areas of Basalt caps where there would have to be good Sapphire beneath but probably too expensive to remove it. Dry sieving in the dust up there even smells volcanic and ashy. The dust is Grey and almost as fine as Bulldust. The deposits up there are massive but same as anywhere they seem to concentrate in certain spots, certain colours also only seem to come in certain sizes. I'll take some pics of different layers down to bedrock next time. Just wandering around up there you are likely to find nice stones, they can be sitting anywhere even nowhere near the creek. Could even be really good specking around the higher terraces at places like GG BS and PR after rain. [url]https://www.prospectingaustralia.com/forum/viewtopic.php?id=2906&p=3[/url] In my Inverell thread you can see what's going into the washplant and it's the Grey Volcanic ashy stuff with small boulders and a bit of Clay. Also at the wash tub area you can see the view behind is pretty flat, that is all flood plain of Frazers Creek, the Creek has probably changed course numerous times over that floodplain over 100 000 years, totally different to GG, being so flat, GG is a very hilly area. All very interesting stuff. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Sapphire Formation and Deposit Theory
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