dec 2 reuters  miner tharisa plc thstl reported a more than twofold jump in fullyear profit on thursday driven by strong production and improved prices of platinum group metals and chrome concentrates tharisa which is listed on both london and johannesburg stock exchanges said headline earnings per share the main profit measure in south africa climbed to 383 us cents in the year ended sept 30 from 169 us cents in the previous year reporting by shanima a in bengaluru editing by arun koyyur