Upper clutha river gold

Hi guys.
A newbie to the community, and loving the experience and knowledge you guys possess.
Do you guys know anything about gold found/history of the upper clutha?
I’ve had a play with a pan and have found fine colours in every pan. Compared with pans I’ve tried in the maniototo from some of the rivers with a rich gold history (ie no colour whatsoever) Even some pans from the arrow with nothing to show for it.
Lots of old dredge tailings around the luggate area and further up.
Worth looking into further?