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Minera Escondida tailings pond, Estación La Negra, Antofagasta Province, Antofagasta, Chilei
Regional Level Types
Minera Escondida tailings pondTailings Pile
Estación La Negra- not defined -
Antofagasta ProvinceProvince
AntofagastaRegion
ChileCountry

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Key
Latitude & Longitude (WGS84):
23° 52' 11'' South , 70° 27' 10'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Antofagasta309,832 (2013)24.9km
Other Languages:
Spanish:
Relave Minera Escondida, Región de Antofagasta, Chile


In 2018 "kröhnkite" and "blödite" were reported to have been collected at a small pond approximately 2.7 km from the workings at Coronel Manuel Rodriguez Mine. They turned out to be salammoniac (coloured by inclusions of copper minerals) and lecontite, respectively (https://e-rocks.com/blogs/1/chilean-blues-update-find-coronel-manuel-rodriguez-mine).
However, subsequently (see https://www.mindat.org/mesg-105-464001.html, May 2019) the following information was provided by the Chilean mineral collector Alex Ibánez:
"This is toxic waste from mining company La Escondida. These wastes were formed in a mining tailings and have been commercialized by unscrupulous people. Do not buy or sell this garbage."
This would agree with the opinion of Chile specialist Gerhard Möhn who wrote that the same anthropogenic material was being sold as coming from "Chuquicamata" (pers. comm. to Uwe Kolitsch).
Still later (see https://www.mindat.org/forum.php?read,106,437964,437964#msg-437964), the pond was clearly located on Google Maps; it is about 50 km from the Coronel Manuel Rodríguez mine. It strongly appears that the pond was used for ammonia leaching of copper ores.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


2 valid minerals. 2 erroneous literature entries.

Detailed Mineral List:

Blödite
Formula: Na2Mg(SO4)2 · 4H2O
Reference: https://e-rocks.com/blogs/1/chilean-blues-update-find-coronel-manuel-rodriguez-mine
Kröhnkite
Formula: Na2Cu(SO4)2 · 2H2O
Reference: https://e-rocks.com/blogs/1/chilean-blues-update-find-coronel-manuel-rodriguez-mine
Lecontite
Formula: (NH4,K)NaSO4 · 2H2O
Reference: https://e-rocks.com/blogs/1/chilean-blues-update-find-coronel-manuel-rodriguez-mine
Salammoniac
Formula: NH4Cl
Reference: https://e-rocks.com/blogs/1/chilean-blues-update-find-coronel-manuel-rodriguez-mine

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
Salammoniac3.AA.25NH4Cl
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Blödite ?7.CC.50Na2Mg(SO4)2 · 4H2O
Kröhnkite ?7.CC.30Na2Cu(SO4)2 · 2H2O
Lecontite7.CD.15(NH4,K)NaSO4 · 2H2O

List of minerals arranged by Dana 8th Edition classification

Group 9 - NORMAL HALIDES
AX
Salammoniac9.1.3.1NH4Cl
Group 29 - HYDRATED ACID AND NORMAL SULFATES
A2XO4·xH2O
Lecontite29.2.1.1(NH4,K)NaSO4 · 2H2O
A2B(XO4)2·xH2O
Blödite ?29.3.3.1Na2Mg(SO4)2 · 4H2O
Kröhnkite ?29.3.2.1Na2Cu(SO4)2 · 2H2O

List of minerals for each chemical element

HHydrogen
H SalammoniacNH4Cl
H Lecontite(NH4,K)NaSO4 · 2H2O
H KröhnkiteNa2Cu(SO4)2 · 2H2O
H BlöditeNa2Mg(SO4)2 · 4H2O
NNitrogen
N SalammoniacNH4Cl
N Lecontite(NH4,K)NaSO4 · 2H2O
OOxygen
O Lecontite(NH4,K)NaSO4 · 2H2O
O KröhnkiteNa2Cu(SO4)2 · 2H2O
O BlöditeNa2Mg(SO4)2 · 4H2O
NaSodium
Na Lecontite(NH4,K)NaSO4 · 2H2O
Na KröhnkiteNa2Cu(SO4)2 · 2H2O
Na BlöditeNa2Mg(SO4)2 · 4H2O
MgMagnesium
Mg BlöditeNa2Mg(SO4)2 · 4H2O
SSulfur
S Lecontite(NH4,K)NaSO4 · 2H2O
S KröhnkiteNa2Cu(SO4)2 · 2H2O
S BlöditeNa2Mg(SO4)2 · 4H2O
ClChlorine
Cl SalammoniacNH4Cl
KPotassium
K Lecontite(NH4,K)NaSO4 · 2H2O
CuCopper
Cu KröhnkiteNa2Cu(SO4)2 · 2H2O

Other Regions, Features and Areas containing this locality

Chile
South America
South America PlateTectonic Plate

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