Published: 7th October 2019 | BY: KARMA BARNDON | AUSTRALIAN MINING MONTHLY          RENASCOR Resources managing director David Christensen has updated the market on an optimised development plan for the Siviour graphite mine that will boost planned stage one production by four times.    Renascor is knee-deep in a definitive feasibility study of Siviour, a prospective project near the town of Arno Bay on South Australia’s Eyre Peninsula, with work well advanced.