Proactive weekly mining round-up: Rio Tinto, Greatland Gold, Kavango Resources... Some of the stories from a big week for mining news in a snapshot Greatland Gold PLC (LON:GGP) has commenced drilling under the Juri joint venture with partner Newcrest Mining Ltd (ASX:NCM). The Juri joint venture is in the highly prospective Paterson province of Western Australia. Rio Tinto PLC (LON:RIO) said production in the first quarter was in line with guidance despite significant rainfall hampering iron ore output in Australia. The international mining group also retained its output expectations for the year and continued to show contrition for the destruction of a 46,000-year-old Aboriginal heritage site in Juukan Gorge.