VOOZH about

URL: https://www.mindat.org/loc-262734.html

⇱ Millotingo Mine (San Juan Mine; San Juan de Millotingo Mine), Pacococha, San Mateo District, Huarochirí Province, Lima, Peru

👁 Image
Now Featuring: The Bruce Carter Collection at Heritage Auctions, Live May 16th
Log InRegister
AboutSupport UsPhotosDiscussionsSearchLearnMore

Millotingo Mine (San Juan Mine; San Juan de Millotingo Mine), Pacococha, San Mateo District, Huarochirí Province, Lima, Perui
Regional Level Types
Millotingo Mine (San Juan Mine; San Juan de Millotingo Mine)Mine
Pacococha- not defined -
San Mateo DistrictDistrict
Huarochirí ProvinceProvince
LimaRegion
PeruCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
11° 49' 23'' South , 76° 14' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Matucana4,517 (2012)18.4km
Morococha7,890 (2012)26.8km
Ricardo Palma4,842 (2013)47.2km
La Oroya33,345 (2012)49.6km
Asentamiento Humano Nicolas de Pierola5,800 (2013)52.9km
Mindat Locality ID:
262734
Long-form identifier:
mindat:1:2:262734:5
GUID (UUID V4):
0


The mine is several km SE of the town of San Mateo. An access road that parallels Hwy 120 but is in a different canyon leads to the mine. Mine outbuildings are located at Lat. -11.8231, Long. -76.2333 at an elevation of 4207 m.

Millotingo Mine opened in 1933, and was originally called the San Juan Mine, or San Juan de Millotingo Mine. It was closed in 1992 because of weak metal prices and local terrorist activity by Shining Path. From 1962 until 1990 a total of 2.6 million tonnes of mill feed was produced, at an average grade of 14.5 troy ounces of silver per short ton, with gold produced as a by product, plus minor copper, lead, and zinc. The ore yielded 39 million ounces of silver and 90,000 ounces of gold over that time span. Upon closure, the mine was estimated to have 661,000 tonnes of ore remaining.

Mining at Millotingo exploited fractures in andesite where silver minerals, mainly sulphosalts, are concentrated in upper portions away from silicified zones. Lead and zinc increase with depth. The sulphosalts precipitated at a temperature near 200 C, and best silver/gold ores are shallower than 400 m.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

ⓘ Chalcopyrite
Formula: CuFeS2
References:
ⓘ Polybasite
Formula: [Ag6Sb2S7][Ag9CuS4]
ⓘ Pyrargyrite
Formula: Ag3SbS3
References:
ⓘ Pyrite
Formula: FeS2
References:
ⓘ Pyrrhotite
Formula: Fe1-xS
References:
ⓘ Quartz
Formula: SiO2
References:
ⓘ Rhodonite
Formula: CaMn3Mn[Si5O15]
ⓘ Sphalerite
Formula: ZnS
References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘPyrite2.EB.05aFeS2
ⓘPyrargyrite2.GA.05Ag3SbS3
ⓘPolybasite2.GB.15[Ag6Sb2S7][Ag9CuS4]
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 9 - Silicates
ⓘRhodonite9.DK.05CaMn3Mn[Si5O15]

List of minerals for each chemical element

OOxygen
Oⓘ QuartzSiO2
Oⓘ RhodoniteCaMn3Mn[Si5O15]
SiSilicon
Siⓘ QuartzSiO2
Siⓘ RhodoniteCaMn3Mn[Si5O15]
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ Polybasite[Ag6Sb2S7][Ag9CuS4]
Sⓘ PyrargyriteAg3SbS3
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
CaCalcium
Caⓘ RhodoniteCaMn3Mn[Si5O15]
MnManganese
Mnⓘ RhodoniteCaMn3Mn[Si5O15]
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
CuCopper
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ Polybasite[Ag6Sb2S7][Ag9CuS4]
ZnZinc
Znⓘ SphaleriteZnS
AgSilver
Agⓘ Polybasite[Ag6Sb2S7][Ag9CuS4]
Agⓘ PyrargyriteAg3SbS3
SbAntimony
Sbⓘ Polybasite[Ag6Sb2S7][Ag9CuS4]
Sbⓘ PyrargyriteAg3SbS3

Other Regions, Features and Areas containing this locality

South AmericaContinent
South America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Quick NavTopMineral ListOther RegionsReferences
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 4, 2026 10:46:58 Page updated: August 20, 2025 20:03:23
Go to top of page