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Detecting in black sand???
hoppy  
Posted : Monday, 6 September 2010 10:53:11 AM(UTC)
hoppy

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Hi All, I am new to here having chanced across your site whilst surfing the net for information. I have just bought a Minelab X Terra 705 and starting out. Would I get a DD coil to detect in heavy black sand or is this beyond the capabilities of the 705? Thanks.
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nzgold  
Posted : Tuesday, 7 September 2010 3:33:00 PM(UTC)
nzgold

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I'm not sure about the 705, having not used a VLF, but generally the black sand, especially the really heavy,magnetic stuff, messes with detectors. PI's and VLF's. I think it depends on Iron content. At a guess i'd say that it wouldn't like the black sand much and it'd be pretty noisy.
The DD coil will work better than a mono on black sand, but there's only so much they can do before they get noisey too.
What sort of areas are you planning on detecting in? Beaches or rivers or terraces?
Maybe someone who's used an Xterra could help you better.
Cheers ;)
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hoppy  
Posted : Wednesday, 8 September 2010 2:51:55 PM(UTC)
hoppy

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Hopefully not detecting too much in the black sand that's for sure! Just happened to take the dog for an outing in the weekend and ended up at the beach. Shame nothing sounds like it works in black sand as I bet there would be a few goodies to be had. Ah well, was a good day out anyway.
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stressless  
Posted : Thursday, 3 February 2011 6:09:51 AM(UTC)
stressless

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hi hoppy

I have a xterra 705 also and had a hell of a time with noise and false signals at the beach + black sand to check out some of the videos on mlotv.com i found some of there info useful there are good articles and videos on all minelabs there

I think alot of it comes down to trail and error read the manual lots, make sure you use the beach mode(the umbralla comes up on the screen when active) in coin/relic setting, it does help a bit i found that i got better results and less noise using prospecting mode on the really black sands and you can give the machine a bit of adjustment using ground balance offset function which can help to(you can use this also to try and minimize the affects of hot rocks) , just play around with the settings and if its not working out just do a factory reset and start over.

Hopefully some of this is helpful its only what i have experienced so far, i still have not got any gold with it yet, just coins, bullets, tiny bits of metal, junk etc

What coil are you running?

Cheers


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kiwijw  
Posted : Thursday, 3 February 2011 10:58:48 AM(UTC)
kiwijw

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I dont think any detector will detect gold in the black sands on a beach. The gold is way too small. A detector pics up on an individual bit of gold. Not an accumulation of heaps of small fine bits, like the black sand beach gold. Sorry to inform you this. Your best bet is to hit shallow bed rock in creeks & streams or the exposed bed rock from the old sluiced areas.

Good luck & happy hunting

JW :)
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stressless  
Posted : Friday, 4 February 2011 1:27:40 AM(UTC)
stressless

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Thanks JW

I have just started detecting river beds and bed rock but have only come up with what i am guessing are hot rocks and junk so far, i read with great interest some of the post regarding thinking outside of the riverbed and not having to be near water so i will give that a go and hopefully find something
soon

Cheers
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