Porphyry Cu Project
Self funded Exploration
Sobek is situated within the tectonic flat-slab segment of the Mio-Pliocene volcanogenic belt which is known as one of the world’s most endowed regions for giant magmatic-hydrothermal ore deposits. Sobek was staked by Mirasol based on prospective local structural architecture with an important north-northeast trending mineralized structural corridor crosscut by north-northwest trending deep seated trans-cordilleran lineaments. The Sobek property land position was expanded in 2021 and 2022 following significant results reported by Filo Mining Corp. from its Filo del Sol project (located 7km to the east), which included a remarkable intercept of 858m at 1.80% CuEq (including 163m at 5.43% CuEq).
 Reference: Filo Mining – May 13, 2021 News Release
A new mineralized district is developing in the Sobek area with multiple deposits located in close proximity, including the Filo del Sol, Josemaria and Los Helados porphyry Cu-Au deposits located 7km east, 10 km east-northeast and 20 km north of Sobek, respectively. Mirasol now controls 11,120 ha of exploration claims in this district in three blocks that are all on the Chilean side of the border with Argentina.
Sobek is situated within the tectonic flat-slab segment of the Mio-Pliocene volcanogenic belt which is known as one of the world’s most endowed regions for giant magmatic-hydrothermal ore deposits. This belt hosts many large Cu deposits, including Rio Blanco, El Teniente and Pelambres-Pachon, as well as significant epithermal Au-Ag deposits, including Pascua-Lama, Veladero and El Indio. The Sobek property covers Lower Miocene intrusives and volcanics in the South and Central blocks and a Permo-Triassic intrusive sequence in the North Block. Repeated magmatism in the region from the Permian through the Eocene to Lower and mid-Miocene has led to the formation and preservation of several giant porphyry Cu-Au deposits.
In February 2022, Mirasol reported that agreements had been secured with local communities and landowners to access 100% of Sobek. A field campaign is now underway evaluating prospects across the entire property package. This extensive field campaign will assess the potential for porphyry Cu-Au and epithermal Au-Ag mineralization with further geochemical sampling, detailed geological mapping and additional ground based geophysical surveys (IP and magnetics) over priority targets.
This program is following up on the high resolution 2,690 line-km helicopter-supported aeromagnetic (“Mag”) survey completed in mid-2021. The Mag survey detected multiple highly prospective geophysical magnetic targets across the entire Sobek property package. This has improved understanding of the structural architecture of the property and formed an important base for the ongoing field exploration at Sobek.
The maiden field campaign in the Sobek Central Block confirmed the presence of a volcanic complex hosting rhyodacitic and andesite volcanics flanked to the west by igneous intrusive rocks of dioritic composition. These intrusive rocks locally host disseminated magnetite and tourmaline and also localized zones of strong “crackle brecciation” with gypsum matrix infill and siderite veinlets. Within the high topographic elevation levels, significant and widespread areas of strong argillic alteration have been identified and are being further evaluated during the current campaign. All of these geologic features are considered promising and support the exploration model for Sobek.
At the Sobek South Block, a scouting campaign identified a large hypabyssal dacitic dome complex emplaced within the older Paleocene-aged granitic to granodioritic host rocks. The margins of this dome commonly display autobrecciation textures and host low temperature silicification and argillized alteration halos. Initial observations suggest these domes occupy a large part of the South Block. The eastern part of this block also hosts a very attractive magnetic low (magnetite destruction) anomaly which sits between the eastern dome edge and the Argentine border. These peripheral areas of the dome are considered highly prospective and are being reviewed in the field.
The Sobek North Block, which was recently expanded and now encompasses 6,961 ha, is being evaluated during the current campaign. Several compelling Mag anomalies exist within this block, including both magnetic highs and lows, which will be the focus of the current field campaign.
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