Tom in Ca,
She was talking about looking for the Lost Dutchman Mine. She would not be looking for modern trinkets and fumble fingered jewelry. While Tonto permits metal detecting (to a point), if she is trying to uncover a lost mine, there will be much more than just small surface digging. Even if she was not doing extensive digging, if she is off trail detecting and digging, then it would be up to the Rangers as to how they would classify her activities. If they wanted to call it mining, they would see if she had filed for the proper permissions. If not, they can charge. Since the LDM is over 100 years old, she would be looking for things that they could call "archaeologically important artifacts", which would place her in the criminal category.
That is Tonto. See what happens in the Superstition Mountain Wilderness Area if they catch you swinging a detector.
Melissa,
If you want to hunt the Lost Dutchman Mine, then I advise you to use one of the following methods:
1. Learn Spanish Mexican Mining Techniques and field symbolism. The problem with that is that there have been a lot of fake rock symbols carved there in the last hundred years or so. Hard to tell the difference between a 150 year old authentic engraving and an 80 year old hoax.
2. Learn to prospect like the old timers. Take a pan with you and work the dry creek beds. Follow the color upstream till it stops, then go back to the last place you panned gold and start looking uphill. Problem with that is that Waltz himself said that "No miner will ever find my mine!"
It ain't gonna be easy. That's why the mine is still lost since 1891!
Mike