Newfield Resources Limited announces its activities for the quarter ended 31 March 2023. Reporting about Tongo Diamond Mine Underground Development they said, 241 carats recovered at a grade of 0.81 carats per tonne (expected grade of 0.8cpt). Underground activity during the quarter was focused on stope development and blasting of the Kundu A segment of the mine.
The ore is lashed to the footwall of the stope raise where it stockpiles awaiting hauling to surface. A total of 1,247 stope tonnes (were blasted with 1,298 run of mine tonnes being hauled to the processing plant. In a limited processing of underground run-of-mine ore was done during the quarter.
Some 297 tonnes of material were processed which yielded 241 carats at a +1.2mm bottom cut off (grade of 0.81 carats per tonne vs. budget grade of 0.8). Material from the underground continues to be stockpiled at the plant for processing.
A second diamond sale is now being planned for Q2-23, subject to rough diamond market conditions. The Tongo Diamond Mine Development comprises two adjacent mining licences covering a combined area of 134 square kilometres in eastern Sierra Leone.
Tongo hosts 11 identified diamondiferous kimberlites, only five of which are incorporated in the current JORC-compliant indicated and inferred diamond resource estimate of 8.3 million carats. Of this resource, a 1.1 million carat probable reserve, has been estimated.
Newfield, under its subsidiary company Sierra Diamonds, has developed the Tongo Diamond Mine into production achieving its first successful diamond sale in May 2022 where it achieved an average price of US$262 per carat.
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