Iron oxide–copper–(silver–gold) (IOCG type) deposit.
The Mina Justa deposit contains two orebodies, i.e., the Main and the Upper orebodies, which are controlled by the NE-trending Mina Justa fault system. The two orebodies are both comprised by a magnetite-sulfide core and surrounding hydrothermal breccias, which contain large (5–50 mm) angular host-rock clasts and magnetite-sulfide cement. The hydrothermal breccias are surrounded by extensive Cu-bearing stockwork ore. Seven alteration/mineralization stages were identified at Mina Justa: Stage I (sodic metasomatism) is represented by widespread albite which replaced plagioclase in the andesitic lavas and volcaniclastic host rocks. Stage II (K-Fe metasomatism) mainly consists of K-feldspar and magnetite but without sulfide. Massive aggregates of diopside, actinolite and minor magnetite were formed in Stage III (Ca metasomatism). Stage IV is dominated by calcite and specular hematite, with the latter being almost entirely replaced by Stage V magnetite. Stage V (magnetite-pyrite stage) mostly consists of magnetite, pyrite, quartz and chlorite and Stage VI (Cu-mineralization stage) is dominated by calcite, chalcopyrite, bornite and chalcocite. Stage VII hematite locally developed in the upper part of the orebodies.

The property is licensed to the Chinese Shougang Institute of Geological Exploration.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Copper

ⓘ Gold

Mineral List

20 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ 'Hydrothermal breccia'

Detailed Mineral List:

ⓘ Actinolite

Formula: ◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂

References:

[[1]]Li, R., & Wang, X. L. (2022). External fluid incursion during Cu-mineralization stage of Mina Justa iron oxide copper-gold (IOCG) deposit: Evidence from triple sulfur isotope geochemistry of chalcopyrite. Ore Geology Reviews, 105102.

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

ⓘ Atacamite

Formula: Cu₂(OH)₃Cl

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

ⓘ Bornite

Formula: Cu₅FeS₄

References:

Huayong Chen, T. Kurtis Kyser und Alan H. Clark (2011): Contrasting fluids and reservoirs in the contiguous Marcona and Mina Justa iron oxide–Cu (–Ag–Au) deposits, south-central Perú. Mineralium Deposita 46, 677-706.

ⓘ Calcite

Formula: CaCO₃

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

Huayong Chen, T. Kurtis Kyser und Alan H. Clark (2011): Mineralium Deposita 46, 677-706

ⓘ Chalcocite

Formula: Cu₂S

References:

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

ⓘ 'Chlorite Group'

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

ⓘ Chrysocolla

Formula: Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

ⓘ Cuprite

Formula: Cu₂O

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

ⓘ Digenite

Formula: Cu₉S₅

References:

ⓘ Diopside

Formula: CaMgSi₂O₆

References:

ⓘ Goethite

Formula: α-Fe³⁺O(OH)

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

ⓘ Hematite

Formula: Fe₂O₃

References:

ⓘ Hematite var. Specularite

Formula: Fe₂O₃

References:

ⓘ 'K Feldspar'

References:

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

ⓘ Malachite

Formula: Cu₂(CO₃)(OH)₂

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

ⓘ Paratacamite

Formula: Cu₃(Cu,Zn)(OH)₆Cl₂

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

References:

ⓘ Pseudomalachite

Formula: Cu₅(PO₄)₂(OH)₄

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

ⓘ Pyrite

Formula: FeS₂

References:

ⓘ Quartz

Formula: SiO₂

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

ⓘ Tenorite

Formula: CuO

References:

Yuming Chen and Kaitian Wang (2008): Geophysical & Geochemical Exploration 32(2), 126-130

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcocite	2.BA.05	Cu₂S
ⓘ	Digenite	2.BA.10	Cu₉S₅
ⓘ	Bornite	2.BA.15	Cu₅FeS₄
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 3 - Halides
ⓘ	Atacamite	3.DA.10a	Cu₂(OH)₃Cl
ⓘ	Paratacamite	3.DA.10c	Cu₃(Cu,Zn)(OH)₆Cl₂
Group 4 - Oxides and Hydroxides
ⓘ	Goethite	4.00.	α-Fe³⁺O(OH)
ⓘ	Cuprite	4.AA.10	Cu₂O
ⓘ	Tenorite	4.AB.10	CuO
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Hematite var. Specularite	4.CB.05	Fe₂O₃
ⓘ		4.CB.05	Fe₂O₃
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Malachite	5.BA.10	Cu₂(CO₃)(OH)₂
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Pseudomalachite	8.BD.05	Cu₅(PO₄)₂(OH)₄
Group 9 - Silicates
ⓘ	Diopside	9.DA.15	CaMgSi₂O₆
ⓘ	Actinolite	9.DE.10	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
ⓘ	Chrysocolla	9.ED.20	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
Unclassified
ⓘ	'Chlorite Group'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'K Feldspar'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
H	ⓘ Atacamite	Cu₂(OH)₃Cl
H	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
H	ⓘ Goethite	α-Fe³⁺O(OH)
H	ⓘ Malachite	Cu₂(CO₃)(OH)₂
H	ⓘ Paratacamite	Cu₃(Cu,Zn)(OH)₆Cl₂
H	ⓘ Pseudomalachite	Cu₅(PO₄)₂(OH)₄
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	Oxygen
O	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Atacamite	Cu₂(OH)₃Cl
O	ⓘ Calcite	CaCO₃
O	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
O	ⓘ Cuprite	Cu₂O
O	ⓘ Diopside	CaMgSi₂O₆
O	ⓘ Goethite	α-Fe³⁺O(OH)
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	ⓘ Paratacamite	Cu₃(Cu,Zn)(OH)₆Cl₂
O	ⓘ Pseudomalachite	Cu₅(PO₄)₂(OH)₄
O	ⓘ Quartz	SiO₂
O	ⓘ Tenorite	CuO
O	ⓘ Hematite var. Specularite	Fe₂O₃
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Mg	ⓘ Diopside	CaMgSi₂O₆
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Si	ⓘ Diopside	CaMgSi₂O₆
Si	ⓘ Quartz	SiO₂
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
P	Phosphorus
P	ⓘ Pseudomalachite	Cu₅(PO₄)₂(OH)₄
S	Sulfur
S	ⓘ Bornite	Cu₅FeS₄
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Chalcocite	Cu₂S
S	ⓘ Digenite	Cu₉S₅
S	ⓘ Pyrite	FeS₂
Cl	Chlorine
Cl	ⓘ Atacamite	Cu₂(OH)₃Cl
Cl	ⓘ Paratacamite	Cu₃(Cu,Zn)(OH)₆Cl₂
Ca	Calcium
Ca	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Diopside	CaMgSi₂O₆
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Fe	Iron
Fe	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Fe	ⓘ Bornite	Cu₅FeS₄
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Goethite	α-Fe³⁺O(OH)
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Hematite var. Specularite	Fe₂O₃
Cu	Copper
Cu	ⓘ Atacamite	Cu₂(OH)₃Cl
Cu	ⓘ Bornite	Cu₅FeS₄
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Chalcocite	Cu₂S
Cu	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Cu	ⓘ Cuprite	Cu₂O
Cu	ⓘ Digenite	Cu₉S₅
Cu	ⓘ Malachite	Cu₂(CO₃)(OH)₂
Cu	ⓘ Paratacamite	Cu₃(Cu,Zn)(OH)₆Cl₂
Cu	ⓘ Pseudomalachite	Cu₅(PO₄)₂(OH)₄
Cu	ⓘ Tenorite	CuO
Zn	Zinc
Zn	ⓘ Paratacamite	Cu₃(Cu,Zn)(OH)₆Cl₂

Other Regions, Features and Areas containing this locality

Altiplano PlateTectonic Plate

South AmericaContinent

South America Plate

Mollendo basinBasin

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

Yuming Chen (2007): Discovery of Justa Cu deposit in Peru. Geology and Prospecting 43(3), 56-59 (in Chinese with English abstract).

Yuming Chen and Kaitian Wang (2008): Lithogeochemical characteristics of the Justa copper deposit in Peru and the ore-prospecting effect. Geophysical & Geochemical Exploration 32(2), 126-130 (in Chinese with English abstract).

Huayong Chen, T. Kurtis Kyser und Alan H. Clark (2011): Contrasting fluids and reservoirs in the contiguous Marcona and Mina Justa iron oxide–Cu–(Ag–Au) deposits, south-central Perú. Mineralium Deposita 46, 677-706.

[1]Li, R., & Wang, X. L. (2022). External fluid incursion during Cu-mineralization stage of Mina Justa iron oxide copper-gold (IOCG) deposit: Evidence from triple sulfur isotope geochemistry of chalcopyrite. Ore Geology Reviews, 105102.

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