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Offline BackAtchaTopic starter
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« on: September 24, 2009, 12:00:57 pm »
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When I detect at the lakeshore, I run into that band of metallic black sand that makes my detector go nuts.  It's right along the water's edge where the wave ripple action is, and extends several feet in either direction onto the sand and into the water.  I'm the type that keeps my discriminator off, because I don't mind digging every pull tab just so I don't miss that gold ring.  Is there anything else I should be trying to minimize the effects of that annoying black sand?Bang Head

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Offline BitburgAggie_7377
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« Reply #1 on: September 24, 2009, 02:18:07 pm »
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Just goes to show you......where I come from black sand is a good thing and makes me pull out the gold pan (just to check).

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Offline BackAtchaTopic starter
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« Reply #2 on: September 24, 2009, 03:10:13 pm »
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The black sand I deal with just makes my detector beep constantly.  Ugh.  Even if there was a big ol' nugget under there, I'd never know it!

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Offline GoldDigger1950
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« Reply #3 on: September 24, 2009, 03:19:52 pm »
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Quote:Posted by BackAtcha
The black sand I deal with just makes my detector beep constantly.  Ugh.  Even if there was a big ol' nugget under there, I'd never know it!


Before you say that, give this a try. Tie a ring on a string, bury it and see how the detector reacts. You may be surprised. Often, a hard target will be detected right through that haze.

Try something else while you have the target buried for your experiment. Lift your coil until the sound goes away. That might be as high as 3 inches or so. Maybe even more. Then see how it detects the hard target.

You don't have your detector listed on your details so more specific advice won't likely be forthcoming.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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Offline BackAtchaTopic starter
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« Reply #4 on: September 24, 2009, 03:24:36 pm »
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It's a Cobra Beach Magnet that I'm using, if that helps...

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Offline GoldDigger1950
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« Reply #5 on: September 24, 2009, 03:37:08 pm »
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Sadly, VLF/TR detectors were actually designed to help you find black sand areas. Try the other tips I mentioned or dial down your sensitivity when you encounter the black sand areas. See if that helps. But do carry along a gold ring on a string to test each option. It will help you determine the best settings to use.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
Let's Talk Treasure!
Offline BackAtchaTopic starter
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« Reply #6 on: September 24, 2009, 03:40:21 pm »
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Oh it helps me find black sand areas alright!!!  Ha ha!   Grin

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Offline GoldDigger1950
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« Reply #7 on: September 24, 2009, 03:58:08 pm »
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In the world of gold prospecting, black sand is an indicator of the presence of gold. Streams and rivers that have black sand present are often the same that accumulate fine gold particles. You'll already have read some information on that from here no doubt but to summarize: Black sand is heavy and accumulates in the same places as gold.

The gold and black sand are seen in the bottom of the gold pan after processing and that's a good thing. That doesn't mean that gold is ALWAYS found with black sand.

Thus, a detector that can find black sand is a very good thing for prospecting.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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« Reply #8 on: September 24, 2009, 05:03:14 pm »
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If the band of black sand is wide enough, you might want to try doing your ground balancing over the black sand and detect that area separate from the surrounding areas.   (similar in principle at least to hunting out here where we sometimes deal with zones of 'hot' rocks when looking for relics)....just a thought (although I think I'd go with the ring trick first.....sounds simpler and surer)

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Offline GoldDigger1950
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« Reply #9 on: September 24, 2009, 05:24:25 pm »
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I looked at the specs for the detector and it doesn't seem to have a ground balance. That's a sad state of affairs for a VLF machine.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
Let's Talk Treasure!
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