In my opinion Prospecting you may need a camera that can be dropped in water or mud, thrown on the ground, tossed aside etc. I like my GoPro4 for its small size and wide shots...and the fact you can chuck it from a plane and it may survive the crash.
The negatives for me are normal battery life (not much more than 1 hr), and sound quality when inside the waterproof housing. Im not about to go change a battery when im digging holes.
I have purchased a waterproof USB battery pack so it can run all day...and there are countless "mods" on youtube to be able to make the camera do everything you need, including external mic to fix sound issues when the camera is being protected by the waterproof case.
No one camera does it all, but when im on my hands and knees covered in dirt, then high-banking with water spaying all over me, some cameras will be "not working for long" in the spots I work, while the GoPro or similar thrive in this environment. I like the Chest harness as anything on my head is going to annoy me after a short while. Switch it on and forget about it. Whatever happens in front of you is what you get on camera, and the wide angle means you are getting stuff to your left and right that you would need to turn your head to see so it will capture that snake over to your left that you missed because you were looking ahead but the camera got it.
Wanna go for a swim, no problem. Wanna Check a mine shaft.......attach it to a fishing rod, use your IPhone to view what the camera is viewing and bombs away. Want to see if its a reef or sandy bottom while fishing in a boat, do the same
If you are not the Action man trying to do it all yourself with minimal fuss, there other cameras that will suit. The Gopro is more for set and forget and go prospecting....if you are more into the cinematography and getting the perfect picture instead of finding gold....try something else.