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  • El Domo VMS deposit: On the Path of Growth and Development

El Domo VMS deposit: On the Path of Growth and Development

  • 05 Nov 2019
  • 4:00 PM - 6:00 PM
  • 2nd Floor, 20 Toronto St, Toronto, ON M5C 2B8
  • 3


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Jason Dunning, Vice President Exploration, Adventus Mining Corporation

Speaker Biography:

Jason Dunning is a professional exploration geologist with over 20 years of experience in greenfield and brownfield environments with success in developing sustainable project pipelines for both small and large capitalization companies. Before joining Adventus Mining, he was Mining Group Manager, Geology & Exploration at Nyrstar from 2014 to 2017, responsible for management of all geological, exploration, land tenure, and mineral reserve/resource work at Nyrstar’s mineral properties. Previously, Jason served as Vice President, Exploration at Alamos Gold Inc., Selwyn Resources Ltd., and Yukon Zinc Corporation, and in exploration roles with Hudson Bay Mining and Smelting Co. Ltd., and Pamicon Developments Ltd., at various project sites globally. Jason holds both bachelor and master level degrees in geology from Carleton University and Laurentian University, respectively.

Jason also has done extensive volunteer work in the mining industry with AMEBC, CFES, CIM and GAC in order to provide education opportunities and promote dissemination of research and professional development information to up and coming Geoscientists.

Talk Abstract:

The El Domo Cu-Au-Zn volcanogenic massive sulphide (VMS) deposit is the core asset of the 22,000-hectare Curipamba project located in west-central Ecuador, about 2.5-hours northeast of port city of Guayaquil, off the Pan American Highway. The project is being actively explored by Adventus Zinc Corporation (75%) and Salazar Resources Ltd. (25%) with regional exploration ongoing and engineering studies continuing post completion of a Preliminary Economic Study in May 2019 (see SEDAR filing; June 14, 2019).

Discovered in 2008, El Domo highlights the mineral potential of Curipamba project for not only additional VMS discoveries, but the property also has epithermal and porphyry style targets that have been developed since 2006. Since discovery, El Domo has seen over 54,000 metres of drilling in 272 drill holes with the key focus now being advancing El Domo towards development. Infill drilling is anticipated to be completed by end of 2018.

VMS mineralization at Curipamba project formed within the Paleocene–Eocene submarine volcanic arc of the Macuchi Formation. Evidence suggests sulphide mineralization replacing the volcanic host rocks below the seafloor. The footwall is a felsic dome complex and the hanging wall is a mafic succession. Sub-seafloor replacement is highlighted due to the extensive presence of massive sulphide clasts throughout the massive sulphide unit, which appear completely healed by a massive sulphide matrix. These textures are indicative of active resedimentation of a rapidly evolving felsic dome complex preserving the VMS system through burial and continued hydrothermal replacement under the seafloor.

The massive sulphide mineralization displays strong zonation from a pyrite core through to a thick copper-rich zone that gradually becomes zinc-rich towards its top and lateral margins. In the footwall there is an irregular but extensive low-grade stockwork zone that also has extensive gypsum alteration, as well as intense quartz-sericite-pyrite alteration. The hanging wall rock units exhibit only limited hydrothermal alteration.

Research has constrained the formation of El Domo using age dating techniques such as 40Ar/39Ar age that yielded a 41.49±0.37 Ma from the host rocks and a U/Pb zircon age date of 42.13±0.54Ma from the footwall felsic dome complex.

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