Introduction
La Rosita is located in the low sulfidation epithermal metallogenic area of the Deseado Massif, Patagonia, Argentina, within the area of special mining interest in the Province of Santa Cruz.
The volcanic plateau of the Deseado Massif of Santa Cruz is home to several gold and silver mines, including Cerro Negro, Cerro Vanguardia, Manantial Espejo, Joaquín, COSE, Cerro Moro, San José, Mina Martha, Lomada de Leiva and Cap Oeste, Don Nicolás, which are some of the successful projects neighboring La Rosita.
The Project is located approximately 350 kilometers north of the provincial capital city (Río Gallegos) and approximately 415 kilometers south of Comodoro Rivadavia (Chubut Province).
Access to the La Rosita project is good via roads, mostly paved. Provincial Highway #12 is very close to the project. Regional infrastructure is good, with the town of Gobernador Gregores 70 kilometers (one hour by car) southwest of the Property.
Santa Cruz is a mining-friendly province, actively supporting mining and oil exploration and development.
Project
The La Rosita project covers an area of 5,986 ha or 59.86 km2 , which consists of the Alfa II and Alfa III mining concessions.
Most of the initial exploration activity was carried out on targets located at Alfa II (1,992 ha).
Main features
The La Rosita project belongs to the so-called Deseado Massif, which hosts significant AgAu deposits in Argentina. As in neighboring mines, the mineralization is typically low-sulphidation epithermal associated with controlled structural veins, quartz veins associated with stock work and hydrothermal and disseminated phreatic breccias.
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Several exploration targets were identified and evaluated along with previously obtained magnetic, geological, geochemical, structural and alteration data to plan a drilling program.
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More than 22 km of mine tracks were constructed to allow easy access to the main target areas.
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An initial exploration program has been conducted which included: a ground magnetometer survey covering approximately 16 km2 (320.3 linear kilometres), detailed surface geological mapping at a scale of 1:2,000 over an area of approximately 6 km2 and 3.5 linear kilometres of mechanical trenching (51 trenches) to define geological units and alteration characteristics as an initial test of potentially mineralized structures.
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Detailed and systematic geological mapping has been completed on part of Alfa II, approximately 6 km2 including Cerro Los Mogotes.
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Analytical data from trench sampling have confirmed the existence of extensive areas of geochemically anomalous silver and gold (up to 3.3 g/t Au and 240 g/t Ag) , as well as much larger zones of anomalous base metals (Pb, Zn, Cu), as well as the pioneers mercury and arsenic.
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Eleven lines were completed totaling 12 kilometers of IP/pole-dipole resistivity survey line.
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Priority targets with a close spatial relationship to known precious metal mineralization have been identified in the Antena and Sabrina veins (Cerro Mogotes), Felices Pascuas Breccia, María Sol vein (Cerro Bayo, Bajo Cobre, Encrucijada, Tramo Norte) and Hormiga vein (Cerro Solo).
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La Rosita is in an early stage of exploration of a low sulphidation epithermal system. The results show geological parameters similar to those of the large projects that are producing or close to producing in the Deseado Massif.
