Undetectable GOLD!

[RM Outback]

Registered fine on the SD2000? not sure what your trying to say there. SD2000 came out in 1994 well before LCD screens. As my memory goes wasn't until late 90's early 2000's before ML released a machine with LCD.

 

[malri_au]

No,registered fine on the vlf pin pointer.its a cheap bounty hunter vlf pp that I tuned up using guides online.

If you read up you will find the sd2000's are quite the detector for their day.

when I hit the 10 post count I can post the youtube vids I uploaded.

 

[malri_au]

bump for one more post.

 

[malri_au]

No,registered fine on the vlf pin pointer.its a cheap bounty hunter vlf pp that I tuned up using guides online.

If you read up you will find the sd2000's are quite the detector for their day.

[video=480,360]https://www.youtube.com/watch?v=MrKZusmivj8[/video]
[video=480,360]https://www.youtube.com/watch?v=KNyWYA_AyJM[/video]

and another vid showing the 'shotgunning' effect the detector has when a target is close.

[video=480,360]https://www.youtube.com/watch?v=ENpQ8BDel3s[/video]

 

[Danny13]

Do you know the purity of the gold?

 

[malri_au]

also,by register,I mean an audible change in tones,it also lacks discrimination like some of the newer models do,so is a dig all machine,unless you're going by tone.

Unsure of purity other than it's meant to be a natural WA nugget.

 

[malri_au]

Here's the ebay seller and their feedback,over a year,feedback is quite good.

I'll still test it out properly when I can be bothered.

https://feedback.ebay.com.au/ws/eBa...sspagename=VIP:feedback&ftab=FeedbackAsSeller

 

[Danny13]

Sorry what Gold detector do you use?

 

[malri_au]

Moneybox was kind enough to send me two samples of his undetectable gold after their latest Pilbara pilgrimage.
0.7 and 0.6g - they should howl on most detectors.
Whilst I haven't tried the samples under any detectors, I have noted:
1. They are light for their size compared to nuggety gold (little heft),
2. Appear finely crystalline to the naked eye,
3. The gold is dispersed in a quartz host (see image below),
4. Good electrical conductivity was evidenced with a multimeter over most areas.
So, certainly these are not Lateritic (forming in laterites) due to the strong presence of quartz. I was hoping they were supergene enrichments.
I'm no geo, but I believe that this is eluvial primary gold coming from an orogenic process but likely not secondarily enriched to form larger solid nuggets.
The gold is heavily interspersed in quartz to the point that, whilst conductive across large areas, the tortuous shape that eddy currents would have to take around the quartz inclusions would not permit any significant "back emf" (and a very quickly decaying one) that would be easily detectable.
Will be interesting to try with both PI and VLF detectors over the next few weeks when I can get out again.
Any real geos out there - please correct me if I have goofed in my understanding.
I'd really like to explore undetectable supergene gold - anyone got any?
https://www.prospectingaustralia.com/forum/img/member-images/6786/1512981223_sample_2b.jpg

someone else mentioned these in another thread,but i've known about them for a long time.

https://www.prospectingaustralia.com/forum/viewtopic.php?id=18231

http://falconmetaldetectors.com

have always wanted to try one.

 

[malri_au]

Sorry what Gold detector do you use?

Old Minelab SD2000.

With mods they can do just as well as more modern minelabs.

I would have rathered a SD2200d,but price was a factor.

 

[Danny13]

Bloody interesting , by any chance did the nuggets come from the Gascogne or Pilbara areascof W?

 

[malri_au]

Couldn't say,ebay listing says Furnissdale,same as the return on the postage.Not too far to some decent goldfields,plus their other listings of similar WA gold,seem legit enough to me.Will report back once i've got a more affirmative test done.

 

[Danny13]

Couldn't say,ebay listing says Furnissdale,same as the return on the postage.Not too far to some decent goldfields,plus their other listings of similar WA gold,seem legit enough to me.Will report back once i've got a more affirmative test done.

If you can confirm pilbera, gasgoign regions of wa , I do have a geo theory that might apply

Kind regards

Danny

 

[malri_au]

I'll send them a message on ebay and see what they say.

Just looked over the nugget with my loupe,there's still some dirt in a few of the pits.

 

[malri_au]

This what I picked up with the 14 x9 inch evo not far from Thanes on private property , makes me wonder what I may of missed. https://www.prospectingaustralia.co...0797_fd7900b2-5a77-48bf-92c6-7184c89fb280.jpg

almost pyritic gold?

gold has been known found together with pyrite.

https://i.pinimg.com/originals/3d/18/16/3d1816aecd41adb3b7faf1a886f83a79.jpg

https://df2sm3urulav.cloudfront.net/tenants/gr/uploads/content/content_1362117962.jpg

 

[malri_au]

'gold wears an iron hat'

http://www.goldrushnuggets.com/1graugosp.html

 

[malri_au]

Can you see it?

 

[Ridge Runner]

I would still like to see what a normal High Gain VLF detector would do on these nuggets,

 

[hAyyoUinAU]

Take it into a Minersden store and see if the GPZ 7000 or the SDC 23000 registers it.

The SD2000 was a great machine in its day, no one will argue that. But its not a 23000.

And remember that the GPZ7000 is not PI, so would be interesting to check with it as well.

 

[malri_au]

Take it into a Minersden store and see if the GPZ 7000 or the SDC 23000 registers it.

The SD2000 was a great machine in its day, no one will argue that. But its not a 23000.

And remember that the GPZ7000 is not PI, so would be interesting to check with it as well.

I believe the SDC2300 would beat crap out of the sd2000 on smaller surface gold,but depth is where the sd2000 would crap all over the sdc2300.

you can't change a sdc2300 coil right?

I'm yet to try a small coil,which are reknown for picking up smaller gold better.

Here's an ancient video from woody,demonstrating .22g on an sd2000.

[video=480,360]https://www.youtube.com/watch?v=wSlJI6fjGw4[/video]

The mod in question was simple component upgrade with better quality items.