READ: Silvercorp Metals announces publication of annual Sustainability Report for Fiscal 2022 All told, the property has estimated mineral resources of 18.7 million tonnes in the measured and indicated categories, which grades at 242 grams per tonne (g/t) of silver, 0.27 g/t gold, 3.51% lead, and 1.03% zinc; and contains 146 million ounces (oz) silver, 161 thousand oz gold, 657 thousand tonnes lead, and 193 thousand tonnes zinc. There are 12.3 million tonnes in the proven and probable categories, which grade 241 g/t silver, 0.26 g/t gold, 3.36% lead, and 1.03% zinc; and contain 96 million oz silver, 105 thousand oz gold, 414 thousand tonnes lead and 127 thousand tonnes zinc. The results of the 2020-2021 underground drilling program at the Ying Mining District show that most of the major mineralized vein structures are still open at depth and laterally, the company said.