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Location
Carisla is located in the Department of Junin, Province of Huancayo, close to the village of Bethania in the Western Cordillera of southern Peru at elevations between 4,500 and 4,900m. A regional thoroughfare bisects the property and drill roads offer internal access.
Title
The project is 100% owned by Monterrico.
Geology
The host rocks to the mineralisation are layered Tertiary volcanic sediments, andesite flows and sills, strongly altered in places to a high-sulphidation silica-clay-alunite assemblage. Altered rocks are intruded by a mineralised dacite porphyry stock. Small polymetallic veins containing quartz, galena, sphalerite and stibnite cut altered volcanic rocks adjacent to the stock.
History
The area was acquired in 1994 by Queenstake following recognition of a strong TM anomaly. Mapping and sampling results motivated a JV with Newcrest and detailed work began in 1996. Newcrest identified three gold targets; a gold-copper anomaly over a dacite porphyry with quartz-magnetite stockworks and potassic alteration (Cerro Bethania), a 300 m x 600 m area of elevated gold values in a strongly silicified volcanic sedimentary/fragmental unit (Cerro Huarminachay), and a series of steep dipping north to north-northeast trending quartz-clay-alunite ribs (Cerro Carisla).
Unfortunately, RC drilling to investigate these anomalies started during the rainy season and technical and logistical difficulties contributed to its early termination. However, 15 holes were drilled (2,346m) on the first two targets with the best result coming from the gold-copper porphyry (150m of mineralisation at an average grade of 0.33 g/t gold and 0.13% copper). Cerro Carisla, considered a lower priority target at the time, remains untested. A total of US$500,000 has been spent on the property to date.
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