London-listed Acacia Mining, which has various operations in Tanzania, has posted an adjusted net loss of $7-million for the quarter ended March 31, compared with adjusted net earnings of $7-million in the first quarter of 2018. It produced 104 899 oz of gold at an all-in sustaining cost (AISC) of $1 023/oz during the quarter, interim CEO Peter Geleta noted in an operational update released on Thursday.