No we’re not talking about the light effect behind the pretty young gal. What we are talking about is oxidization around targets. A lot of folks have debated this over the years but in a nutshell the halo effect can affect any object in the ground that corrode, tarnish or become absorbed into the surrounding soil.
When does the Halo Effect come into play in the hunt for gold? Often. If you’ve ever dug a signal that you swore up and down was real and then it disappeared and you walked away, it may have been the Halo Effect. Frequently, the Halo Effect will make a small target sound much larger than it actually is, you may have experienced this from time to time while recovering a gold nugget with your metal detector. The reason behind this is the other elements that are mixed in with the gold, chiefly copper and silver leach or oxidize into the area around the nugget making its detectable area larger. To think of it in simple terms the halo is a natural signal amplifier. Getting back to the disappearance of the signal, thats the halo being disrupted or the amplifier’s batteries draining.
You can also have some fun with this and prove it to yourself. You’ll need a few pennies and a test area. Bury them out of range of the detector, test it to be sure. Wait a year and come back and see if you can hear them, if not come back the next. Now you’re probably laughing or scratching your head thinking that pretty crazy. If you want to speed the process up bury some zinc or something made of magnesium. You’ll most likely hear it within a month.
It can be the subtle knowledge of the little things that mean the difference between gold in the poke and the skunk. As always, Good Luck and Happy Hunting!