Sun Silver Ltd (ASX:SS1) has found silver grading up to 524 grams per tonne over more than a metre through drilling work guided by portable X-ray fluorescence (pXRF) readings at its Maverick Springs play in Nevada. The pXRF readings have supported Sun Silver in finding new zones of silver, with intersections from one hole including 75 grams per tonne (g/t) of silver (Ag) over a width of 73 metres from 249.94 metres. Within this, internal grades were recorded at up to 524g/t over 1.52m recorded from 254.51 metres. In another (extensional) hole, mineralisation included 10.67 metres at 48g/t Ag f…