The 100% owned Odin copper project was staked by Mirasol in 2016 as part of its ongoing Atacama-Puna generative program.
Odin is centred on a large alteration system that is evident from the company´s Landsat 8 alteration processing. Field follow-up with ground based alteration mineralogy measurements and geochemical sampling has defined a compelling conceptual porphyry target concealed beneath a geochemically barren alteration Lithocap. This target has not been tested by previous exploration at Odin. The recent staking of new claims, has significantly expanded the area of alteration controlled by Mirasol at Odin from the original 2.6 to 6.5 sq kms. Systematic field exploration is required to determine if the recently staked claims could potentially host additional porphyry copper targets. The Odin target warrants further testing with electrical geophysical surveys and follow-up drilling.
The Odin project is located 35 km north of BHP’s large La Escondida copper mine giving Odin key operational advantages in infrastructure and access. Odin is localised at the intersection of the Domeyko Fault system, a continental scale structure that has influenced emplacement of a number of giant Oligocene age porphyry copper deposits in Chile, and what Mirasol geologists consider to be parallel fault strands of the trans-orogen Archibarca structure. This structural setting is analogous to that of the nearby Escondida copper district.
Mirasol's new exploration model suggests the oxide copper mineralization that has been the focus of exploration by previous companies at the property, may be peripheral geochemical leakage from a possibly large, undrilled porphyry copper target, centred beneath an unmineralized alteration cap rock (a "lithocap") located in the eastern portion of the property.
Mirasol's field work at Odin includes geological mapping and rock-chip sampling of the historic trenches, and outcrops, and multi-element geochemistry and alteration mineralogy acquired with portable X-ray Fluorescence (pXRF) and portable Near Infrared Spectrometers (pIR-Spec) field analytical equipment (to learn more about these exploration technologies, go to Further Information below). Rock chip assays show strongly anomalous oxide copper, molybdenum and gold mineralization in the historic trenches.
Alteration mineral mapping has identified relatively lower-temperature, intermediate argillic alteration mineral assemblages associated with oxide copper mineralization, and higher-temperature, advanced argillic and phyllic alteration assemblages found in the alteration lithocap cap. These exploration vectors were integrated with the recent porphyry exploration models to outline a compelling conceptual porphyry target located at depth beneath the lithocap.
To learn more about Odin see all Current and Historical News Releases.
Odin previous exploration
Odin remapping historic trenches
Odin illite-silica altered breccia from trench, 6450 gt Cu
Odin hydrothermal brecciated rhylotic quartz eye pyroclastic from lithocap area
Odin rockchip MCR0017247 10.5 gt Au 15 gt Ag 38.1 ppm Cu
Odin rockchip MCR0017404 2.46 ppm Au 2.83 ppm Ag 42.7 ppm Cu