The Romero gold discovery, Dominican Republic
Where: Meeting at the OBA Conference Centre, Conference Room C&D, Suite 200, 20 Toronto Street in Toronto.
Refreshments sponsored by Goldquest Mining Corporation afterward at the Metropolitan Restaurant Bar, 20 Victoria Street, Toronto.
Admission Cost: free for TGDG Members and students. New memberships: New annual TGDG memberships for the 2012-2013 season will be available at the meeting for $25, the same low, low price as last year.
The Romero gold and copper discovery was announced by GoldQuest in May 2012 and is located in the Province of San Juan, Dominican Republic on the island of Hispaniola in the Greater Antilles of the Caribbean Sea. The project is 165 km west-northwest of the capital city of Santo Domingo.
Romero is at the northern end of the Las Tres Palmas trend. It was discovered during a 15-hole drill program that commenced in early 2012, which was designed to test geophysical targets from a 2011 ground IP survey. The survey identified a 2.5-kilometre-long by several hundred metres wide chargeability anomaly striking north-south, with a change in direction at the northern end trending towards the northwest, where the Romero Discovery was made.
The trend was initially located through surface sampling and later by drilling, which outlined the mineral resource of 3.1 million tonnes grading 3.14 g/t Au for 316,000 ounces in the inferred category at La Escandalosa Sur, at the southern end of the trend. Romero differs from La Escandalosa in that it has much thicker mineralization intervals ranging from tens of metres to over 200 metres and contains higher concentrations of copper and gold. The gold grades are in the range of 1 g/t to over 5 g/t over the entire interval, with some zones of over 10 g/t in areas contained within. The copper values range from 0.2% to over 1% copper, which occurs with the gold mineralization. Future deeper drilling, below 200 metres depth, will test for other zones of Romero-style mineralization along the Las Tres Palmas trend and on other concessions in the area.
The Las Tres Palmas trend is on the south side of Central Cordillera of Hispaniola and is hosted by Cretaceous age Tireo Formation volcanic rocks and limestones, which formed in an island arc environment. The local geology is comprised of a relatively flat-lying sequence of intercalated subaqueous, intermediate to felsic volcanic and volcaniclastic rocks and limestones on the east side of thick rhyolite flows or domes.
Mineralization is intermediate-sulphidation epithermal in style, and is associated with quartz-pyrite, quartz-illite-pyrite and illite-chlorite-pyrite alteration. Gold mineralization is associated with disseminated to semi-massive sulphides, sulphide veinlets and quartz-sulphides. The sulphides comprise pyrite with sphalerite, chalcopyrite, galena and possible tennantite-tetrahedrite. Oxidation is shallow to a depth of 10 m to 15 m.
Jeremy Niemi is a resource geologist from Sudbury, Ontario, and alumnus of Laurentian University. His career began with an interest in the quantitative side of exploration, gaining experience and developing his skills at Inco’s Victor Deep. After working for Inco, he consulted with Datamine Canada, honing his resource modeling skills on various projects around the globe. Jeremy has since held management positions at Skye Resources, Kinross Gold, and Noront Resources. His current position is Director of Technical Services & Compliance for GoldQuest Mining Corporation where he is responsible for building a strong technical foundation, corporate reporting, advancing the exploration strategy and defining the mineral resources. This afternoon he will be providing an overview of GoldQuest’s Romero Discovery, which is located in the San Juan region of the Dominican Republic.