DIGHEM

[DizzyDigger]

There are TWO signals that contain the secret sauce for a simple calculation of "Phase angle". Every discriminating metal detector uses these two signals. Think of the signal returning from the earth. It's called the response. The response is measured by the receiver coil. When a metal or conductive mineral is in the field of detection, the response is measured at the receiver coil as an "amplitude" and a "phase" change!

If I understand correctly, you've built a highly sensitive metal detector on a
very large scale, and have an operating system capable of calculating and noting
the phase angle at distance and depth. Also, somebody wrote some serious software
that can process the data (and reset) at very high speeds.

I can't do the math, but do comprehend your concepts, I believe.

One question....how much power are you pumping down to the antenna array?

 

[Carl-NC]

From the Whites Electronics US Patent info:

A Phase angle of 10 degrees or less is GOLD or SILVER or a combination of the two.

A Phase angle of 30 Degrees is COPPER.

A Phase angle of 90 degrees is IRON.

In-between angles? More research needs to be done! All of the metals and related minerals have a Phase Angle!

Phase responses have as much to do with size and thickness as they do metal type. So gold, copper, and silver can easily overlap. For example, a tiny gold nugget might have an eddy response* of 95° (similar to aluminum foil) while that Centennial nugget with the exact same alloy might be 160° (similar to a silver quarter). Iron responses can be magnetic (<90°) or eddy (>90°) depending on size. In short, phase angle can't be used to ID metal types.

*My response phases are based on loss angle where ferrite is 0° and an ideal conductor is 180°. I don't recall what the White's patent used.

 

[dowser]

If you say so. With all due respect, peer review and debunking by Randi and others show otherwise.

I'm still waiting for more support for the method.

- Geowizrd

I'm not familiar with Randi, debunking any of my posts?

 

[russau]

And I thought the metal detector only found Gold /Silver and other metals ! Brain overload for me ! and how much does one of these Majic locator machines cost ? and , I know, "if you have to ask, you can't , you can't afford one ! and they are 100% correct in my case ! But even a dreamer can find their rainbow once in awhile !

 

[russau]

After looking up info for DIGHEM I seem to remember a system that was used 35 years ago by our Government to map out oils / gas /and water supplies in Alaska and eventually other Country's around the world. It was called A.I.R. for air born imaging radar . It was initially used from satellites ( I forgot the name of them ) BUT they eventually went over to using aircraft to scan the ground and then follow up with boots on the ground using the current hand held device (XRF ) we see advertised ! I saw this in a copy of a mining mag back then while I was waiting for my flight to Alaska . Depending on how they set this device , it could point out the mineral your looking for ! Real expensive device ! I wonder if this could be a off shoot of the XRF that I read about way back then

 

[geowizard]

XRF stands for X-ray Fluorescence as a method of spectrometric analysis. XRF spectrometers come in hand-held form with a sample "window" of about one centimeter. The sample has to be held against the window for a short time that allows reflected photons to be counted. For accuracy a longer sample read time is needed.

They are also used on the bench in a laboratory.

The X-rays illuminate and respond to the sample surface only.

It's a different technology.

- Geowizard

 

[geowizard]

And I thought the metal detector only found Gold /Silver and other metals ! Brain overload for me ! and how much does one of these Majic locator machines cost ? and , I know, "if you have to ask, you can't , you can't afford one ! and they are 100% correct in my case ! But even a dreamer can find their rainbow once in awhile !

Metal detectors only detect metals or metallic minerals.

The DIGHEM systems are not for sale. Governments contract companies to do DIGHEM surveys.

Surveys are being done all over the world by a few companies qualified to use them. The value to TreasureNet readers is the fact that the surveys in cases like Alaska are published and prospectors or exploration companies can download the DATA from sources on the internet. Then make new discoveries!

The data can be viewed on a PC or Laptop with GeoSoft Oasis Monjaj Viewer.
The viewer is FREE. The data is Free.

- Geowizard

 

[DizzyDigger]

For those wondering about the DIGHEM style surveys, this page gives some
very good explanations, although the math is far above my pay grade..

DIGHEM — Electromagnetic Geophysics

An open source textbook on applied electromagnetic geophysics. Aimed at providing background and physical understanding for steady state Maxwell equations as they apply to geoscience problems.

em.geosci.xyz

 

[russau]

For those wondering about the DIGHEM style surveys, this page gives some
very good explanations, although the math is far above my pay grade..

DIGHEM — Electromagnetic Geophysics

An open source textbook on applied electromagnetic geophysics. Aimed at providing background and physical understanding for steady state Maxwell equations as they apply to geoscience problems.

em.geosci.xyz

YEP ! Just google : DIGHEM and scroll through the list ! Interesting info !

 

[geowizard]

For those wondering about the DIGHEM style surveys, this page gives some
very good explanations, although the math is far above my pay grade..

DIGHEM — Electromagnetic Geophysics

An open source textbook on applied electromagnetic geophysics. Aimed at providing background and physical understanding for steady state Maxwell equations as they apply to geoscience problems.

em.geosci.xyz

Dizzy,

I understand your point about math. I decided to provide end users of the DATA with a picture!
It is said, a picture is worth a thousand words!

The black line is Phi (Phase angle.). Copper is 30. less than 30 is gold mixed with copper.. 10 or less is gold/silver.

The numbers across the bottom are survey locations. There are 1000 survey locations, 12 feet apart.

12 feet x 1000 = 12,000 feet. The deposit is a gold deposit 325 x 12 = 3900 feet long..

Stick around! There's more!

- Geowizard

 

[geowizard]

Gleaning VALUE from DATA:

The take-away from this is that there is VALUE in DATA. The end user (you and I) can SEE the value in terms of a virtual assay of each sample every 12 feet. We can SEE "quality". Secondly, we can measure the length of the deposit. Length is one dimension, but... Length gives a perspective of "quantity"! We can can SEE the overall inferred value. We can make a decision given GPS locations fro each sample of "Where" to dig or drill as the case may be. I would also note disseminated GOLD is found in and around GOLD deposits. Knowledge of a GOLD deposit allows a prospector to predict an erosion model that leads to a PLACER deposit.

The DATA is FREE. The software is FREE.

It's your move!

Stick around! There's more!

- Geowizard

 

[geowizard]

Geomorphing:

Geologists are smart people!

Many TreasureNet members are amateur Geologists! Geologists are driven by rock formations, rock color, ages of rocks. and names of rocks. TreasureNet members are driven by mundane thing like GOLD.

What we know:

TreasureNet members are investigators. We know how to search for treasure and we know what tools we need to find and locate buried treasure. That's a fact! We know GOLD is heavy. We know GOLD will erode out of an outcropping and move into washes and other water courses, moving with alluvial sediments! Over millions of years a process of erosion moves tons of GOLD and other HEAVY sediment down hill - down slope to a creek or river, eventually ending up on bedrock.

Treasure hunters use Geophysical tools! Treasure hunters call that a no brainer.!

All of the sediments originated in "high ground" and eroded into lower places eventually changing the contour of the landscape.

The average treasure hunter would say, "it should be obvious to the most casual observer!"

If we find a LODE GOLD deposit on a sloping hillside, it's game over. A PLACER deposit requires a little prospecting up-hill. It's a way of reading the most probable course or direction of flow for GOLD.

It's a form of reading the hills called geomorphing.

Fun stuff!

- Geowizard

 

[geowizard]

Indeed there is. And that is entirely my point.

It isn't a matter of what I have recovered. The system has been used worldwide by exploration companies and prevails as the go-to for airborne geophysical exploration.

- Geowizard

 

[geowizard]

Buried Gold is like buried treasure;
Gold deposits are being discovered everyday around the world by companies using DIGHEM. There are literally thousands of hits that I have encountered in all of the mining districts in Alaska.

These are like sunken "Spanish Galleons" loaded with Gold and Silver that you can drive up to!

-Geowizard

 

[geowizard]

I have done numerous presentations on various deposits in Alaska. One is called Hunter. It is in the Iditarod mining district. It is magnetic. Ship wrecks are discovered by use of magnetometers. The Cannons create a magnetic anomaly! Banded Iron Formations often have gold!

Stick around and see how this is possible!

- Geowizard

 

[Assembler]

Perhaps drilling is called for to sample at the target locations?
Is one hundred feet deep enough for a sample at such locations?

 

[k0bgalan]

Wouldn't it be nice if we could afford and be able to carry, a combination of a metal detector, a ground penetrating radar, and a magnetometer all in one! Until then, one thing we do need is a ton more processing power! I believe we're about on the threshold of that innovation. Imagine being about to read phase shifts of a few tenths of a degree, and do it when transmitting a frequency sweep of near zero to tens of kilohertz? And, be able to store the readings automatically for analyzing later? Wishful as these innovations might be, until they become reality, let's just get out in the field and do your thing!

 

[Assembler]

Wouldn't it be nice if we could afford and be able to carry, a combination of a metal detector, a ground penetrating radar, and a magnetometer all in one! Until then, one thing we do need is a ton more processing power! I believe we're about on the threshold of that innovation. Imagine being about to read phase shifts of a few tenths of a degree, and do it when transmitting a frequency sweep of near zero to tens of kilohertz? And, be able to store the readings automatically for analyzing later? Wishful as these innovations might be, until they become reality, let's just get out in the field and do your thing!

One still needs to sample at the target location. Drilling a hundred feet or more is not cheap or easy if one has to fly all of the equipment there.

 

[Carl-NC]

Wouldn't it be nice if we could afford and be able to carry, a combination of a metal detector, a ground penetrating radar, and a magnetometer all in one! Until then, one thing we do need is a ton more processing power! I believe we're about on the threshold of that innovation. Imagine being about to read phase shifts of a few tenths of a degree, and do it when transmitting a frequency sweep of near zero to tens of kilohertz? And, be able to store the readings automatically for analyzing later? Wishful as these innovations might be, until they become reality, let's just get out in the field and do your thing!

There are mine detectors that combine induction metal detecting with GPR, and adding a fluxgate mag sensor to a metal detector has also been done. And we can easily read phase shifts to 0.1°, but targets don't respond with that level of precision. You're lucky if a target has a phase spread of only 1°. And chirp designs have also been built and tested. The point is, the processing power is easily available now for any of this, it's all a matter of practicality.

 

[Carl-NC]

There are literally thousands of hits that I have encountered in all of the mining districts in Alaska.

Do you own a shovel?