×

Saint Patrick, Asturias, Spain: Dolomite breccia-hosted Cobalt

A collaborative project generation agreement between LRH Resources (“LRHR”) & Altius Resources Inc. (“Altius”) identified a regional primary cobalt exploration project in Asturias, Northern Spain. Spain has an excellent exploration and mining code, offers indigenous technical services, and is ideally located to take advantage of EV metal supply requirements of major European car manufacturing. Utilizing first mover advantage in association with investment group Generic Capital Inc. (Generic) approximately 69,000 hectares, for eight investigation permits, are under application with the mineral exploration licensing authority in Ovideo.

Immediate generative reviews have centered on our St. Patrick licence application at an abandoned mine site (El Aramo). First mining works took place on an oxidised zone, which is well developed at the upper levels of the mine. Subsequently, a cementation zone was been exploited until the closure of the mine at the end of the 1950s with estimated total production of production of “200,000 tons @ 12% Cu, 1-2% Ni and 1-2% Co” from a reported non-compliant geological “resource” of approximately 600,000 tons (Paniagua et al., 1987). The disused workings has been dormant for over sixty years and is under-explored by the application of modern exploration models or advanced geochemical, geophysical or remote-sensing survey techniques.

Aramo Mine has been classed as an epithermal carbonate-hosted Cu-Co-Ni deposit by previous workers with mineralization considered related to the delivery of metalliferous brines along Late-Hercynian (Variscan; Late Carboniferous) faults to host limestone with depositional temperatures of 90-130°C (Paniagua et al., 1987). The Aramo Fault is an E-W structure, one of many within the prospect area, thought to be one of the main the controls on mineralization at Aramo in association with its intersection with the Aramo thrust and the dolomitised host Mountain Limestone lithology. High grade Cu-Co-Ni sulphide veins (0.25m to 3.0m) appear associated with these structures within the limestone horizon as well as a spatially associated dolomitization and fracture fill / breccia-hosted disseminated Cu-Co-Ni sulphides. Three stages of mineralization with an important later supergene stage (Paniagua et al., 1987):

Stage I:  pyrite, bravoite, Cu-Ni arsenides and sulpho-arsenides with later marcasite

Stage II:  major tennantite & sphalerite as idiomorphic crystals in dolomite or quartz,   replaced by chalcopyrite and talnakite

Stage III:   Cu-Fe sulphides – chalcopyrite, talnakite and bornite

Supergene:  native copper, bornite, digenite, chalcocite, covellite, cuprite, tenorite, azurite,   malachite and erythrite.

Research by the technical team has confirmed copper-cobalt mineralization with grades of up to 0.5% Co in dolomites at Aramo and has identified three further disused mines (up to 1.7% Co in samples from spoil at Astur E licence application), as well as recording Cu-Co showings along over 80km of strike, which present a regional exploration play for structurally-controlled, carbonate-hosted, high-grade copper-nickel-cobalt vein mineralization within a fold and thrust terrain.

A review and verification work program has commenced and is being driven by senior Altius, Generic and LRHR staff with the assistance of European exploration contractors, Aurum Exploration and support from highly-experienced local geoscientists. Initial focus is on verifying the mineralization grades, styles and mineralogy, as well as its primary controls at each abandoned working or showing, prior to the execution of regional target generation.

Facebook
Twitter
LinkedIn