Pasto Bueno

Pampas District, Pallasca Province, Ancash, Peru

Key Information

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Pasto Bueno is likely a mining district in Pampas District, Pallasca Province, Ancash, Peru, known for its mineral richness.
Research suggests it produces rhodochrosite, hubnerite, green fluorite, and quartz, with some uncommon minerals like augelite.
The evidence leans toward it having a hydrothermal vein system, associated with a quartz monzonite stock.
It seems likely that mining started around 1910, with significant historical production and recent restart efforts.
The area likely has a temperate to cold climate, with heavy rains from November to March, supporting local agriculture.

Geographic Location

Pasto Bueno is situated in the Pampas District of Pallasca Province, in the Ancash region of Peru, at coordinates approximately 8° 9' 15'' South and 77° 51' 9'' West. This places it in the central part of Peru, within the Andean mountain range, about 12 km from Cabana, the capital of Pallasca Province. The region is known for its high elevation and diverse landscapes, making it a significant area for mineral exploration.

Minerals Produced

Pasto Bueno is renowned for its production of several minerals, particularly appealing to collectors:

Rhodochrosite: Known for its red to pink colors, often found in rhombohedral crystals up to 15 cm.
Hubnerite: A manganese tungstenate, forming prismatic crystals up to 15 cm, valued for its metallic luster.
Fluorite: Notably the emerald green variety, which is rare and highly sought after.
Quartz: Frequently includes inclusions like arsenopyrite, sphalerite, pyrite, rutile, or chlorite, adding to its aesthetic appeal.
Other minerals, such as augelite and euclase, are less common but add to the locality's diversity, making it a hotspot for enthusiasts.

Geological Structure

The geological setting of Pasto Bueno is characterized by hydrothermal veins associated with a quartz monzonite stock, indicative of a porphyry-type deposit. This environment has facilitated the formation of a variety of minerals, driven by mineral-rich fluids altering the surrounding rocks, which is typical for the Andean region.

Mining History

Mining in Pasto Bueno likely began in 1910 with the discovery of wolframite, with the company Fermin Malago Santolalla e Hijos established in 1934 to exploit the deposits. Historical production was significant, with disruptions noted in the 1990s due to guerrilla activities, but efforts to restart operations were reported in 2006, suggesting ongoing interest and activity.

Local Culture and Characteristics

The local culture is deeply rooted in Andean traditions, with nearby Pallasca District hosting an annual festival in honor of San Juan Baustista, featuring folkloric performances. The area has a rich history, with evidence of Inca and pre-Inca cultures, adding a layer of historical depth to its cultural tapestry.

Climate and Ecology

The climate in Pasto Bueno is temperate to cold, with temperatures ranging from 42°F to 65°F (5.5°C to 18°C). It experiences heavy rainfall from November to March, which supports local agriculture and contributes to a unique ecological environment, given its high altitude and varied terrain.