Popular Post phoenix Posted April 23, 2017 Popular Post Share Posted April 23, 2017 I got out to Tarnagulla today for a detect and I got 2 little specimens and then I finished off the day with this beauty. I was using the 7000 with JP`s recommended conservitive settings and this sounded like a very deep target. I was surprised when I moved it about 5" down. What really excited me about this one was I did some testing and the 2300 can get it at about 8" and the 7000 can only get it at 6". That in itself told me there was a fair bit of gold in it. I suspect a 5000 would struggle to hear it. This speci is predominately quartz but it has a thin layer of ironstone around it. In the first 2 photos are the only two pieces that are readily visible but under high magnification there are at least 100 pinpoints of gold visible all around it. I have no idea how much the ironstone mucks up the SG, but the sg for quartz says there is 28.649 grams of gold in this piece. I`m not going to drop this one in acid till my mate waves his 5000 over it. I`m hoping there is going to be a heap of gold visible once the ironstone is gone. cheers Dave 15 Link to comment Share on other sites More sharing options...
deutran Posted April 23, 2017 Share Posted April 23, 2017 Very nice find Dave,well done.I would recommend an SG for 50% Quartz and 50%black ironstone as a guess an SG of 3.5-4.5 for the total rock.Its a very difficult one to SG.Just from the ones I've done in the past its my guess. 3 Link to comment Share on other sites More sharing options...
phoenix Posted April 23, 2017 Author Share Posted April 23, 2017 Steve what is the formula for 50-50? Link to comment Share on other sites More sharing options...
deutran Posted April 23, 2017 Share Posted April 23, 2017 I've sent a link.Just use SG of 4 in the formula and that should cover the combination. Link to comment Share on other sites More sharing options...
Northeast Posted April 23, 2017 Share Posted April 23, 2017 Very nice Phoenix - look forward to seeing it post acid. 1 Link to comment Share on other sites More sharing options...
bloodgold2 Posted April 23, 2017 Share Posted April 23, 2017 Nice mate yeah on species the 7000 excels over the 5k hands down. 2 Link to comment Share on other sites More sharing options...
phoenix Posted April 23, 2017 Author Share Posted April 23, 2017 Hey JW. I have another quartz speci that I got about 30 years ago with a 60khz Whites GoldMaster that sg`s at 13 grams of gold, and it has heaps of gold visible, a 5000 can not hear it at all, the 7000 can hear it at about 6" and the 2300 can hear it a little deeper. No mate today I was using the 14". My settings were gain 7, target volume 6, high yield and difficult ground, and the only setting I played around with on the 7000 was general gold mode. General can hear it but not quite as deep as high yield. cheers Dave 1 Link to comment Share on other sites More sharing options...
madtuna Posted April 23, 2017 Share Posted April 23, 2017 bugger the acid Dave... smack the crap out of it and pan it off! curious to see the results.. Well done! 1 Link to comment Share on other sites More sharing options...
beatup Posted April 23, 2017 Share Posted April 23, 2017 very nice can't wait to see it cleaned up 1 Link to comment Share on other sites More sharing options...
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