Seismic Imaging help.

[wreckee]

Well we tested the big detectors , GEM 300 EM meter , Aqua Scan AX2000 MAG.... which you will find some great targets with but only if there iron or steel , which we are not looking for and ground resistivity which will not work all that well on wet sand so can anyone tell me how Seismic Imaging works in wet sand ?? Cheers , Nick.

 

[geowizard]

EM (electromagnetic) systems include all metal detectors! EM detectors detect all metals!
With discrimination, EM can tell you what the metal type is.

Target ID is all about discrimination.

GEM systems measure "Conductivity". All metals are conductive. That covers all metals except sodium and a few others.

Stick around! There's more!

- Geowizard

 

[99thpercentile]

GEM Systems is a Canadian manufacturer of magnetometers and VLF instruments. The GEM 300 was a piece of garbage multi frequency electrical conductivity profiling instrument manufactured by Geophysical Survey Systems, Inc (GSSI) in New Hampshire around 2000 as part of a collaboration with Geophex, Ltd in Raleigh, NC. The GEM 300 was a version of the GEM-2 instrument made by Geophex. It was so bad that GSSI blamed Geophex by saying that they didn’t know how to design instruments, and Geophex said GSSI didn’t know how to build instruments.

If it worked the way it was supposed to it should have been able to map geology and find metallic targets to a depth of 10-15 ft.

 

[geowizard]

For an EM technical perspective, I provide links to a few rich resources at...

Electromagnetic methods

Hi Folks, I've been around a while on this and other Forums. I have been most prolific on the Alaska Gold Forum http://alaskagoldforum.x10host.com/phpbb/viewforum.php?f=1 . It's time to bring some REAL discussion about a METHOD that works. You don't need to ask around for opinions. The proof...

www.treasurenet.com

(post #11)
- Geowizard

 

[Barton]

I have used the Pulse Star with both the 18" and the 40" search coils and it will pick up both ferrous and not ferrous metals ( steel /iron and gold and silver ) this is a good machine that is great for hunting caches. I have also used Ground Penetrating Radar, which is a little more difficult to use. I have seen images that looked great and were not so great once dug--as well as the exact opposite. Some people dislike GPR,s and say they do not work--often this can be a poor location or a poor operator analyzing the images. GPR's when properly operated can clearly see underground tunnels, the D e a
th Traps Placed by the Spanish , as well as the metal contents still in a tunnel.

In my opinion the Pulse Star, the Magmometer, and the GPR can cut years off the time it takes to recover a Spanish Cache. It can also possibly save your life--and warn you of catastrophic danger. As an example Charles Kenworthy says that a Heart can lead to treasure and can even be directly over a treasure cache! Yet the Spanish often used the Heart to eliminate individuals looking for there treasure. I have seen stone hearts and Shelter Birds that are 30 --50 feet in sice in the American SW. One can search around / all 4 sides of a stone heart as well as walk on top of it and shoot through the Stone heart using a GPR. In my experiance of using the GPR on Stone hearts--they have never had a cache underneath them--yet many have been traps designed to ki
ll people digging below the point of the heart. These traps can often be detected by GPR.

 

[Prairie Gazingfox]

I have used the Pulse Star with both the 18" and the 40" search coils and it will pick up both ferrous and not ferrous metals ( steel /iron and gold and silver ) this is a good machine that is great for hunting caches. I have also used Ground Penetrating Radar, which is a little more difficult to use. I have seen images that looked great and were not so great once dug--as well as the exact opposite. Some people dislike GPR,s and say they do not work--often this can be a poor location or a poor operator analyzing the images. GPR's when properly operated can clearly see underground tunnels, the D e a
th Traps Placed by the Spanish , as well as the metal contents still in a tunnel.

In my opinion the Pulse Star, the Magmometer, and the GPR can cut years off the time it takes to recover a Spanish Cache. It can also possibly save your life--and warn you of catastrophic danger. As an example Charles Kenworthy says that a Heart can lead to treasure and can even be directly over a treasure cache! Yet the Spanish often used the Heart to eliminate individuals looking for there treasure. I have seen stone hearts and Shelter Birds that are 30 --50 feet in sice in the American SW. One can search around / all 4 sides of a stone heart as well as walk on top of it and shoot through the Stone heart using a GPR. In my experiance of using the GPR on Stone hearts--they have never had a cache underneath them--yet many have been traps designed to ki
ll people digging below the point of the heart. These traps can often be detected by GPR.

Those Hearts you have scanned through/ under, how thick is that Hearts stone usually?

 

[Barton]

Those Hearts you have scanned through/ under, how thick is that Hearts stone usually?

The Stone hearts I have personally encountered were from 12 feet from the top of the heart to the point, and 5 feet thick to 30 feet tall / long and 10 feet thick. Most of the hearts are smaller.

Eagles are often just 1 to 3 feet as that gives you the direction to travel. That said I have seen one eagle that was 30 feet from the mouth to the tip of the Eagles right wing, and I have also been to a site where the Eagle was probably 400 feet from wing tip to wing tip.

Owls are usually small say 1 to 2 feet in height. Yet in Colorado I have been to a site with a 30 foot tall owl and a appx 50--60 foot tall owl. Owls are usually there at cache sites.

Also at cache sites one has to be very careful about Snakes and lightning Bolts. I have actually seen snakes with Lightning bolts on top of them. There are warning you of the presence of D ea th Trap s . NEVER UNDERESTIMATE THE DANGER A TRAP CAN CREATE. NEVER ASSUME AN OLD TRAP WILL NOT WORK!!

 

[Prairie Gazingfox]

The Stone hearts I have personally encountered were from 12 feet from the top of the heart to the point, and 5 feet thick to 30 feet tall / long and 10 feet thick. Most of the hearts are smaller.

Eagles are often just 1 to 3 feet as that gives you the direction to travel. That said I have seen one eagle that was 30 feet from the mouth to the tip of the Eagles right wing, and I have also been to a site where the Eagle was probably 400 feet from wing tip to wing tip.

Owls are usually small say 1 to 2 feet in height. Yet in Colorado I have been to a site with a 30 foot tall owl and a appx 50--60 foot tall owl. Owls are usually there at cache sites.

Also at cache sites one has to be very careful about Snakes and lightning Bolts. I have actually seen snakes with Lightning bolts on top of them. There are warning you of the presence of D ea th Trap s . NEVER UNDERESTIMATE THE DANGER A TRAP CAN CREATE. NEVER ASSUME AN OLD TRAP WILL NOT WORK!!

My area is different. I am into different kind of Analyses. Dowsing analyses.
But very interesting what you wrote!