What is really phenomenon???????

[mustefa ubram]

hi to all
After much research in the field of remote detection .I reached good results
But the question that I was heavily thinking And perhaps the minds of many friends.
What is really phenomenon???????
Some say that the electromagnetic fieldSay some of the metal ions in the soilSome say there is no such a thing&....
Why magnetometer can detect magnetic metals in the soil But can not detect non-magnetic metals
What is the phenomenon that changes the resonant frequency of a LC circuit?

How is really revealed the phenomenon???
How the phenomenon intensifies???
AND.AND.AND.......??????
There are a lot of friends on this site that have high knowledge in this regard.

FRANCO ,GEO,WM6,NICOLAS,MORGAN,and other dear freinds

I want to all the friends that help to better understand the phenomenon.

What is really phenomenon???????