Lunk

Nice finds Fred. I like the flow lines on the top stone in the second pic. 

If your specimen is indeed a meteorite that has chondrules yet is not attracted to a rare earth magnet, it may be a Rumurutiite, or R-chondrite; they are essentially free of elemental nickel-iron alloy. Good luck and congrats on a possible great find. 

Best B-day wishes JP, hope you had a golden day. 

Nice shooting, wtg!

I've only needed to use the severe ground type setting once. It was on an old nugget patch where there is an outcrop of extremely hot volcanic rock. I knew there had to be nuggets in it, but even with the GPX 5000 the ground was way too noisy to discern targets. The severe setting on the Zed completely eradicated the ground response and the signals from the several small nuggets I proceeded to find were sharp and clear. 

Right on. I was going to guess it's in the 20 to 30 gram range, judging by the visual clue you mentioned. 

John B. you say; no wonder the stone is so clean...he must have performed the lick test on it. ?

Wow! I must say that's better than a shotgun, but not quite as good as the eagle scene in The Hobbit.  ? 

That's a beauty Chris; looks relatively fresh. Do you happen to know the mass of your friend's find?

9 minutes ago, Sajuu said:

Hello, Luke 

Pls sent the GPZ 7000 setting for medium mineralized ground and for Normal ground

and also the GPZ is so noisy with 19 inch coil 

What to do with that ?

Howdy Sajuu,

The GPZ 7000 settings I have already given you will handle the medium mineralized ground; for normal mineralized ground, just change the Ground Type from Difficult to Normal...that's all. 

The larger GPZ 19 coil will be noisy in 2 situations: electomagnetic interference from electrical power lines, or ground containing mineral salts such as alkali. If you change the Gold Mode from High Yield to Extra Deep it will help quiet salt-rich ground. If the noise is from nearby power lines, use the automatic Noise Cancel feature. 

Good luck to you!

That's great Fred; ZVT will find the deeply buried meteorites with ease. 

6 hours ago, Sajuu said:

Hello Lunk

I am thankful to you for helping me 

What is that minelab GMK you mentioned 

Pls send the settings for medium mineralized soil and for Normal also 

 

•  
• Quote
•  
• Edit

Nice lump...congrats!

Greetings Sajuu,

I know that the GPZ 7000 can detect coins the size of a U.S. quarter dollar or larger at 2 feet with the stock GPZ 14 coil, but I doubt that even the GPZ 19 coil would hit a large object like a bronze pot at 13 feet in mineralized ground...maybe at 7 feet. You may be better off using ground penetrating radar for such large and deeply buried items. I've also seen large, deeply buried iron meteorites recovered by using pulse induction detectors with homemade coils several feet in diameter. 

Hello Sajuu,

In highly mineralized ground, try these settings;

Gold Mode: High Yield
Ground Type: Difficult
Sensitivity: 15
Ground Balance Mode: Auto
Volume: 15
Threshold Level: 35
Threshold Pitch: 25
Audio Smoothing: High
Volume Limit: 3

You may also have to reduce the sensitivity if the ground is severe. 

Good luck to you!

4 hours ago, fredmason said:

Lunk, does the 161g Franconia pair with the tiny and small irons found out there?

very nice pieces!

fred

 

Howdy Fred,

The 161g Franconia is a stony meteorite, and the 166g iron is from the Quartzsite area; both have not been classified. 

6 hours ago, DolanDave said:

Hey Lunk, 

  So the gpz 7000 works good on Stewart? I tried the 5000 on it, but the soil was to mineralized, even dumbed way down.... I have found pounds of meteorites on Stewart over the years...nice pieces you found...

Hey Dave, I haven't actually had the GPZ 7000 at Stewart Lake; I used my GPX 5000 there back in 2012 and didn't have any luck, so I started hunting with my eyes and a magnet cane - that's how I found the fragments. 

19 minutes ago, Hobo said:

Be nice for scanning tunnel walls .

And vertical cut banks along streams, rivers and desert dry washes. 

Nice! The GMk will be a versatile machine. 

Theoretically one could use a piece of pvc pipe just long enough to accommodate the 5" round coil and the control/handle assembly, and voila - an ultra portable pinpointer with iron discrimination. 

Here are some fragments I spotted on Stewart dry lake near Pahrump, Nevada a few years back. The GPX 5000 will not make a peep on them, even at max gain in fine gold timing with all the filters wide open. They do sound good on the GPZ 7000 though:

Rob, the Pro Sonic already has 3 watts of amplification built into it; adding the screamer on top of it would be overkill. But it would be interesting to hear what it sounds like...if the external speaker survives?

2 hours ago, Ashley100456 said:

While it is designated as a single frequency VLF operating at 45 khz, the Minelab engineers have designed a new way to spread that out so that you are able to detect targets of all sizes.

Sounds like a new innovation never seen in a single-frequency VLF detector before; knowing Minelab, that wouldn't be a big suprise. 

4 hours ago, matt said:

It will be interesting to see if it has any sort of discrimination?

From the specs it appears to have basic iron reject capability denoted on screen as a chance for gold as Steve pointed out, along with a deeper, all metal mode without any discrimination. 

Right on Dave, I was hoping that others would chime in with their Zed space rock finds; thanks for sharing. 

The pulse induction machines are notorious for being unresponsive to certain types of meteorites that a VLF can see, but like you said, the Zed sure nails them!

The Minelab GPZ 7000 is an excellent meteorite detector. At the Franconia strewn field, the three small fragments shown below were "bread crumbs" that led me upslope to their larger parent individual; all were buried beneath the surface.