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Milagro Mine, Cerro Pichao, Colalao del Valle, Tafí del Valle Department, Tucumán Province, Argentinai
Regional Level Types
Milagro MineMine
Cerro PichaoMountain
Colalao del ValleMunicipality
Tafí del Valle DepartmentDepartment
Tucumán ProvinceProvince
ArgentinaCountry

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Key
Latitude & Longitude (WGS84):
26° 21' 15'' South , 66° 3' 15'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Cafayate11,785 (2015)32.2km
Name(s) in local language(s):
Mina Milagro


Pegmatite worked for muscovite during the 1960s and 1970s.

Pegmatitic Body:
Between the veins of the pegmatitic region stands located on the right bank of the Pichao River in its upper 500 metres water down the Milagro mine. It is discordant with the schistosity of the metamorphic rock and presents a course North 15 degrees East, which is in general of all the pegmatites of the area. It's a body of irregular 4 meters of power in its part wider, with a visible a couple of meters extension, losing in the metamorphic rock.
The rock box is a shale injected with a high content of Biotite, not presenting alteration strong in contact, which is on the other hand sharp.
It's a zoned pegmatite with more or less coarse texture whose exterior area is dominated by the feldspar, in addition to abundant black tourmaline(Var: Schorl) levels of fracturing of the feldspar are stuffed with pinched in the form of fine aggregate. Towards the interior of the body decreases the plagioclase, appearing an aggregate consisting of quartz with packages of Muscovite constituting veins of filling of the feldspars.
Below middle of grain more bulk than the previous, still pink feldspar microcline its main component. There were veins of quartz of the kernel replace the feldspar of very frequently.
The presence of minerals like Beryl, tourmaline and uranium, as well as mica which constituted the commercially exploitable area of this body, were sporadically observed in this area contact with the kernel.
The Uraninite is presented in the form of dark nodules and vacuoles within the feldspar, accompanied by Uranophane and Kasolite.
The Kaolinite only appears as the vacuoles of feldspar Microcline alteration in the vicinity of the Uraninite.
The Chalcosite is presented as veins of few centimetres included in feldspar(Albite-Anorthite Series), altered to Malachite in some sectors.
The Spodumene found in small quantities, partially altered, and bearer of microcrystals of Red Garnet and Emerald variety Beryl, dendrites of manganese in part of its surface.

Select Mineral List Type

Standard Detailed Gallery Strunz Dana Chemical Elements

Mineral List


13 valid minerals.

Detailed Mineral List:

'Albite-Anorthite Series'
Reference: Raul Jorge Tauber Larry
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Raul Tauber Larry collection
Beryl
Formula: Be3Al2(Si6O18)
Reference: Raúl Jorge Tauber Larry´s collection
Beryl var. Aquamarine
Formula: Be3Al2Si6O18
Habit: Hexagonal
Colour: Blue aquamarine.
Fluorescence: No.
Description: Collected in 70´s. Good quality. Some specimens have gemmy quality with bllue aquamarine transparent core.
Reference: Raúl Jorge Tauber Larry´s collection.
Beryl var. Emerald
Formula: Be3Al2(Si6O18)
Colour: green, emerald-green.
Description: The Emerald found in small quantities, some loose crystals and spodumene included.
Reference: Raúl Jorge Tauber Larry´s collection.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Reference: Raúl Jorge Tauber Larry´s collection
Chalcocite
Formula: Cu2S
Reference: Raúl Jorge Tauber Larry
'Chlorite Group'
Reference: Raúl Jorge Tauber Larry, visit to the area in November 2013.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Raul Jorge Tauber Larry
'Gummite'
Reference: Raul Tauber Larry collection
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: Raúl Jorge Tauber Larry
Kasolite
Formula: Pb(UO2)(SiO4) · H2O
Reference: Raúl Jorge Tauber Larry´s collection
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Raúl Jorge Tauber Larry´s collection
'Manganese Oxides'
Reference: Raul Jorge Tauber Larry
'Manganese Oxides var. Manganese Dendrites'
Reference: Raúl Jorge Tauber Larry
Microcline
Formula: K(AlSi3O8)
Reference: Raul Jorge Tauber Larry
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Raúl Jorge Tauber Larry´s collection
Quartz
Formula: SiO2
Reference: Raul Jorge Tauber Larry
Quartz var. Citrine
Formula: SiO2
Reference: Raúl Jorge Tauber Larry
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Raúl Jorge Tauber Larry
Spodumene
Formula: LiAlSi2O6
Reference: Raúl Jorge Tauber Larry´s collection.
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: Raul Jorge Tauber Larry
Uraninite
Formula: UO2
Reference: Raúl Jorge Tauber Larry´s collection
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Reference: Raul Jorge Tauber Larry

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var. Citrine4.DA.05SiO2
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
Almandine9.AD.25Fe2+3Al2(SiO4)3
Beryl9.CJ.05Be3Al2(Si6O18)
var. Aquamarine9.CJ.05Be3Al2Si6O18
var. Emerald9.CJ.05Be3Al2(Si6O18)
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Kasolite9.AK.15Pb(UO2)(SiO4) · H2O
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spodumene9.DA.30LiAlSi2O6
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Gummite'-
'Manganese Oxides'-
'var. Manganese Dendrites'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Kasolite53.3.1.1Pb(UO2)(SiO4) · H2O
Uranophane53.3.1.2Ca(UO2)2(SiO3OH)2 · 5H2O
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Spodumene65.1.4.1LiAlSi2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
Beryl
var. Aquamarine
-Be3Al2Si6O18
var. Emerald-Be3Al2(Si6O18)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Gummite'-
Kaolinite-Al2(Si2O5)(OH)4
'Manganese Oxides'-
'var. Manganese Dendrites'-
Quartz
var. Citrine
-SiO2
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
H KasolitePb(UO2)(SiO4) · H2O
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H MalachiteCu2(CO3)(OH)2
H KaoliniteAl2(Si2O5)(OH)4
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
LiLithium
Li SpodumeneLiAlSi2O6
BeBeryllium
Be Beryl var. AquamarineBe3Al2Si6O18
Be Beryl var. EmeraldBe3Al2(Si6O18)
Be BerylBe3Al2(Si6O18)
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C MalachiteCu2(CO3)(OH)2
OOxygen
O Beryl var. AquamarineBe3Al2Si6O18
O Beryl var. EmeraldBe3Al2(Si6O18)
O MuscoviteKAl2(AlSi3O10)(OH)2
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
O QuartzSiO2
O MicroclineK(AlSi3O8)
O BerylBe3Al2(Si6O18)
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O Garnet GroupX3Z2(SiO4)3
O UraniniteUO2
O KasolitePb(UO2)(SiO4) · H2O
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O MalachiteCu2(CO3)(OH)2
O AlmandineFe32+Al2(SiO4)3
O Quartz var. CitrineSiO2
O KaoliniteAl2(Si2O5)(OH)4
O SpodumeneLiAlSi2O6
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
NaSodium
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
AlAluminium
Al Beryl var. AquamarineBe3Al2Si6O18
Al Beryl var. EmeraldBe3Al2(Si6O18)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Al MicroclineK(AlSi3O8)
Al BerylBe3Al2(Si6O18)
Al AlmandineFe32+Al2(SiO4)3
Al KaoliniteAl2(Si2O5)(OH)4
Al SpodumeneLiAlSi2O6
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
SiSilicon
Si Beryl var. AquamarineBe3Al2Si6O18
Si Beryl var. EmeraldBe3Al2(Si6O18)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Si QuartzSiO2
Si MicroclineK(AlSi3O8)
Si BerylBe3Al2(Si6O18)
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si Garnet GroupX3Z2(SiO4)3
Si KasolitePb(UO2)(SiO4) · H2O
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Si AlmandineFe32+Al2(SiO4)3
Si Quartz var. CitrineSiO2
Si KaoliniteAl2(Si2O5)(OH)4
Si SpodumeneLiAlSi2O6
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
SSulfur
S ChalcociteCu2S
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
K MicroclineK(AlSi3O8)
CaCalcium
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
TiTitanium
Ti BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
FeIron
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Fe AlmandineFe32+Al2(SiO4)3
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CuCopper
Cu MalachiteCu2(CO3)(OH)2
Cu ChalcociteCu2S
PbLead
Pb KasolitePb(UO2)(SiO4) · H2O
UUranium
U UraniniteUO2
U KasolitePb(UO2)(SiO4) · H2O
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Angelelli, Víctor (1961) El Berilo en la República Argentina. Comisión Nacional de Energía Atómica. Informe Nº 60. Buenos Aires.
Porto, Juan C. (1961) Informe sobre una inspección a las pegmatitas de Alto Cazadero y Cueva Bazán, Sierras de Quilmes. Tucumán. Dirección Prov. de Minas. Inédito. Tucumán.
Peña, Hugo A. (1965) Las Pegmatitas Micacíferas del Cerro Pichao, Colalao del Valle, Dpto. Tafí. Informe inédito de la Dirección Prov. de Minas, Tucumán.
Peña, Hugo A. (1965) Las pegmatitas micacíferas de las sierras de Quilmes o El Cajón, Dpto. de Tafí (Tucumán).
Kihien, Alfredo (1968) Estudio geológico y petrográfico del cuerpo granítico de Loma Colorada, Colalao del Valle, Dpto. de Tafí (Tucumán). Dpto. de Geología del Instituto Miguel Lillo. Trabajo de Seminario. Tucumán (inédito).
Peña, Hugo A. (1970) La presencia de minerales de Uranio en una pegmatita de la sierra de Quilmes o El Cajón, Provincia de Tucumán.
Tauber Larry, R.J. (1973) Visita a la pegmatita de Mina "Milagro", Cerro Pichao, Departamento Tafí del Valle", Provincia de Tucumán. Informe personal.
Tauber Larry, Raúl J. (2008) Visita a la pegmatita de Mina "Milagro", Cerro Pichao, Departamento Tafí del Valle", Provincia de Tucumán. Informe personal.
Acta Geológica Lilloana (xxxx) 11(5). Fundación e Instituto Miguel Lillo, Universidad Nacional de Tucumán.
Tauber Larry, R.J. (2013) Visit to the area in November 2013.

Other Regions, Features and Areas containing this locality

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South America PlateTectonic Plate

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