re: silver exploration technology
Macmin has done some excellent geochem work around their texas project.
Not necessarily a new concept/technology but they have identified that background levels of potassium(??? need to check that!!) are a good indicator for silver mineralisation.
Nice stuff when you overlay the geochem data over their known resources. And then see how the geochem data extends across a wide area on their tenements.....
When you have known resources in its midst makes it more interesting as the known signature is as good an indicator as you can get...