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Golconda pegmatite field, Governador Valadares, Minas Gerais, Brazili
Regional Level Types
Golconda pegmatite fieldPegmatite
Governador ValadaresMunicipality
Minas GeraisState
BrazilCountry

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Latitude & Longitude (WGS84):
18° 41' 57'' South , 42° 4' 17'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Governador Valadares250,878 (2012)21.2km
Name(s) in local language(s):
Distrito da Golconda


Safira pegmatite district, Eastern Brazilian pegmatite province.

Located about 25 km NW of downtown Governador Valadares.

Mine Information: The Golconda pegmatite was first mined for muscovite in 1908, first by open pit, and then in 1945 (again for muscovite) by underground extraction via an adit along the pegmatite's hanging wall. The mine name was not given.

Geology: Regionally the geology comprises Archean metamorphics--mainly schists and gneisses--emplaced by sheet-like granite pegmatites varying in thickness from 3 to 11 meters and nearly horizontal. The host rock for the Golconda pegmatite itself is a mica schist, generally grading (west to east) from quartz-biotite-garnet to hornblende-rich. Intense deformations in the schists manifest as asymmetrical drag folds and the attendant faulting is thought to be the source of entry for the granitic fluids. The shearing of the country rock and introduction of granitic fluid were probably related to the same general diastrophism.

Grain size increases towards the center of the pegmatite. Compositionally, the pegmatite exhibits an upper and lower border zone, a central zone, and a quartz-perthite zone in the western (and thickest) end of the pegmatite, above the central zone. The border and central zones are essentially K-feldspar, quartz, and muscovite. The greatest diversity of accessory minerals occurs in the more weathered central zone: beryl (morganite and aquamarine), tourmaline, garnet (spessartite), cassiterite, tantalite, microlite, spodumene, cookeite, and muscovite.

Irregular cavities hosting crystallization of the accessory minerals are most numerous in the central zone--especially towards the west.

Golconda is the name of a pegmatite field located approximately 20 km NE of Governador Valadares, where several pegmatites are famous for the production of outstanding mineral specimens; the most important pegmatites on the area are listed below:

Golconda I - also known as "Golconda of the Tourmalines"; it produced on the 1960's several hundreds of kilos of top-quality gem-grade elbaites (green and blue), and also light bicolor crystals (green-pink); associated minerals are quartz, albite, microcline, schorl, muscovite, cookeite, lepidolite; the mine was exausted on the late 1960's and since then no production came from there.

Golconda II - also known as "Golconda of the Micas"; the mine was opened on the time of the Second World War to produce muscovite and clear quartz for industrial purposes; it was operated intermittently until the late 1990's; the most important minerals produced there are elbaite (blue and green), bertrandite (world-class clusters of crystals measuring up to 5 cm), fluorapatite (pink, purple, blue), quartz, albite, achorl, microcline, muscovite, cookeite, cassiterite, columbite-tantalite, hydroxylherderite

Faria mine (on the local language "Lavra do Faria"); it is the main producer of fluorapatites, as short prismatic milimetric crystals showing blue or purple color, over quartz, albite, microcline or muscovite matrix; bertrandite (always as milimetric white crystals) is a commom acessory mineral, together with schorl, elbaite (dark green), rhodocrosite (iron-rich), todorokite, cassiterite, columbite-tantalite; beryl is found as coarse crystals embedded in the microcline on the intermediate zone of the pegmatite

Zé Pedra mine - ("Lavra Zé Pedra") - it produced large schorl crystals (up to 30 cm long) over albite (cleavelandite), muscovite and microcline matrix; in the mid 1990's it produced long and thin (up to 5 x 50 cm) curved schorl crystals; since 2008 it has been producing centimetric crystals of purple fluorapatite; large quartz crystals (up to 50 cm) have also been found, associated with albite, microcline, schorl and muscovite; milimetric white bertrandite crystals are also a common accessory mineral.

Escondido mine - ("Lavra do Escondido") - it produced large quartz crystals showing the so-called "cathedral habit"; long and thin dark-green elbaite crystals (up to 5 cm long) were found growing outside and/or inside the quartz crystals; in 2000 few hundreds of clusters of centimetric like pink fluorapatite crystaks were found

Olhos D'Água mine - ("Lavra Olhos D'Água") - it became famous for the production, on the early 1970's, of clusters of beige-colored, twinned hydroxylherderite crystals measuring up to 10 cm

Jacó mine - ("Lavra do Jacó") - it is a producer of industrial albite and microcline; occasionaly coarse beryl crystals (blue, with some yield of cutting-rough) are found inside the intermediate zone; pockets in the central zone produce flattened morganite crystals, blue or green elbaite, quartz, albite and muscovite crystals.

Regions containing this locality

South America PlateTectonic Plate
South AmericaContinent

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Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

18 valid minerals. 2 erroneous literature entries.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Rob Lavinsky specimen. Niedermayr, G. Lyckberg, P. & Jahn, S. (2011): Mineralientage Munchen 2010. Mineralien Welt. 22 (1): 10-31 (p. 15).
Albite var: Cleavelandite
Formula: Na(AlSi3O8)
Reference: Rob Lavinsky specimen
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Reference: Acquired with owner of mine.
Bertrandite
Formula: Be4(Si2O7)(OH)2
Reference: Moore, T. (1993) What's new in Minerals ? Tucson Show 1993. Mineralogical Record 24:3, 222. Carlos Barbosa specimen
Beryl
Formula: Be3Al2(Si6O18)
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Reference: Kievlenko, E.Ya. (2003) Geology of Gems. (Soregaroli, A. ed. Ocean Pictures Ltd., Littleton, Colorado, 432 pages, at p. 113.
Beryl var: Morganite
Formula: Be3Al2(Si6O18)
Reference: No reference listed
Cassiterite
Formula: SnO2
Columbite-(Fe)
Formula: Fe2+Nb2O6
Cookeite
Formula: (Al2Li)Al2(AlSi3O10)(OH)8
Elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: [www.johnbetts-fineminerals.com]
'Feldspar Group'
Reference: Rob Lavinsky specimen
'Feldspar Group var: Perthite'
Reference: Rob Lavinsky specimen
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Niedermayr, G. Lyckberg, P. & Jahn, S. (2011): Mineralientage Munchen 2010. Mineralien Welt. 22 (1): 10-31 (p. 15)
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Pecora, W.T., Switzer, G., Barbosa, A.L., Myers, A.T. (1950) Structure and mineralogy of the Golconda pegmatite, Minas Gerais, Brazil. American Mineralogist, 35(9-10), 889-901.
Herderite
Formula: CaBePO4(F,OH)
Description: Leavens, P. et al. (1978) studied Brazilian "herderite" from this and other localities and found them to be very OH-rich hydroxylherderite, instead.Leavens, P. et al. (1978) studied Brazilian "herderite" from this and other localities and found them to be very OH-rich hydroxylherderite, instead.
Reference: Leavens, et al. (1978) Am Min.; Leavens, P. et al, Compositional and Refractive Index Variations of the Herderite-Hydroxyl-herderite Series, Am Min v63, p 913-917 (1978)
Hydroxylherderite
Formula: CaBe(PO4)(OH,F)
Reference: Am Min 59:919-925
'K Feldspar'
Reference: Morteani, G., Preinfalk, C., and Horn, A.H. (2000): Mineralium Deposita 35, 638-655.
'Lepidolite'
Reference: [www.johnbetts-fineminerals.com]
'Manganese Oxides'
'Manganese Oxides var: Manganese Dendrites'
Microcline
Formula: K(AlSi3O8)
Reference: Rob Lavinsky specimen
'Microlite Group'
Formula: A2-mTa2X6-wZ-n
Reference: http://www.minsocam.org/ammin/AM35/AM35_889.pdf; Josef Vajdak (Peque Rare Minerals) specimens (JV02/101-4), labelled "Golconda/Urbano mine".
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Stuart Wilinsky specimen; Morteani, G., Preinfalk, C., and Horn, A.H. (2000): Mineralium Deposita 35, 638-655.
Orthoclase
Formula: K(AlSi3O8)
Quartz
Formula: SiO2
Rhodochrosite
Formula: MnCO3
Reference: Luiz Alberto Dias Menezes, Fo.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: No reference listed
'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
Reference: Acquired with owner of mine.
Tantalite-(Fe)
Formula: Fe2+Ta2O6
Reference: Josef Vajdak (Peque Rare Minerals) specimens (JV02/101-4), labelled "Golconda/Urbano mine".
Tantalite-(Mn)
Formula: Mn2+Ta2O6
Reference: Pecora, W.T., Switzer, G., Barbosa, A.L., Myers, A.T. (1950) Structure and mineralogy of the Golconda pegmatite, Minas Gerais, Brazil. American Mineralogist, 35(9-10), 889-901.
'Tapiolite'
Formula: (Fe,Mn)(Ta,Nb)2O6
Reference: found by Christian Bracke.
Todorokite
Formula: (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Reference: Luiz Alberto Dias Menezes, Fo.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Columbite-(Fe)4.DB.35Fe2+Nb2O6
'Microlite Group'4.00.A2-mTa2X6-wZ-n
Quartz4.DA.05SiO2
Tantalite-(Fe)4.DB.35Fe2+Ta2O6
Tantalite-(Mn)4.DB.35Mn2+Ta2O6
Todorokite4.DK.10(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Group 5 - Nitrates and Carbonates
Rhodochrosite5.AB.05MnCO3
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Fluorapatite8.BN.05Ca5(PO4)3F
Herderite ?8.BA.10CaBePO4(F,OH)
Hydroxylherderite8.BA.10CaBe(PO4)(OH,F)
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var: Cleavelandite9.FA.35Na(AlSi3O8)
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
var: Morganite9.CJ.05Be3Al2(Si6O18)
Cookeite9.EC.55(Al2Li)Al2(AlSi3O10)(OH)8
Elbaite9.CK.05Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase ?9.FA.30K(AlSi3O8)
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Unclassified Minerals, Rocks, etc.
'Feldspar Group'-
'var: Perthite'-
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-
'Lepidolite'-
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Tantalite'-(Mn,Fe)(Ta,Nb)2O6
'Tapiolite'-(Fe,Mn)(Ta,Nb)2O6

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
AX2
Cassiterite4.4.1.5SnO2
Group 7 - MULTIPLE OXIDES
AB3X7
Todorokite7.8.1.1(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
A2B2O6(O,OH,F)
'Microlite Group'8.2.2.1A2-mTa2X6-wZ-n
AB2O6
Columbite-(Fe)8.3.2.2Fe2+Nb2O6
Tantalite-(Fe)8.3.2.1Fe2+Ta2O6
Tantalite-(Mn)8.3.2.3Mn2+Ta2O6
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Rhodochrosite14.1.1.4MnCO3
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Herderite ?41.5.4.1CaBePO4(F,OH)
Hydroxylherderite41.5.4.2CaBe(PO4)(OH,F)
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Bertrandite56.1.1.1Be4(Si2O7)(OH)2
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
Elbaite61.3.1.8Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Cookeite71.4.1.2(Al2Li)Al2(AlSi3O10)(OH)8
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
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Orthoclase ?76.1.1.1K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Albite
var: Cleavelandite
-Na(AlSi3O8)
Beryl
var: Aquamarine
-Be3Al2Si6O18
var: Morganite-Be3Al2(Si6O18)
'Feldspar Group'-
'var: Perthite'-
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-
'Lepidolite'-
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Tantalite'-(Mn,Fe)(Ta,Nb)2O6
'Tapiolite'-(Fe,Mn)(Ta,Nb)2O6

List of minerals for each chemical element

HHydrogen
H ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H BertranditeBe4(Si2O7)(OH)2
H HydroxylherderiteCaBe(PO4)(OH,F)
H MuscoviteKAl2(AlSi3O10)(OH)2
H Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
H Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
H AutuniteCa(UO2)2(PO4)2 · 11H2O
LiLithium
Li ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Li Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
BeBeryllium
Be BertranditeBe4(Si2O7)(OH)2
Be Beryl (var: Morganite)Be3Al2(Si6O18)
Be HydroxylherderiteCaBe(PO4)(OH,F)
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Aquamarine)Be3Al2Si6O18
Be HerderiteCaBePO4(F,OH)
BBoron
B ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C RhodochrositeMnCO3
OOxygen
O AlbiteNa(AlSi3O8)
O ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
O FluorapatiteCa5(PO4)3F
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O BertranditeBe4(Si2O7)(OH)2
O Beryl (var: Morganite)Be3Al2(Si6O18)
O QuartzSiO2
O Tapiolite(Fe,Mn)(Ta,Nb)2O6
O HydroxylherderiteCaBe(PO4)(OH,F)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Albite (var: Cleavelandite)Na(AlSi3O8)
O MicroclineK(AlSi3O8)
O Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
O Columbite-(Fe)Fe2+Nb2O6
O CassiteriteSnO2
O RhodochrositeMnCO3
O Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
O BerylBe3Al2(Si6O18)
O Beryl (var: Aquamarine)Be3Al2Si6O18
O Tantalite-(Fe)Fe2+Ta2O6
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O Tantalite(Mn,Fe)(Ta,Nb)2O6
O Tantalite-(Mn)Mn2+Ta2O6
O Garnet GroupX3Z2(SiO4)3
O HerderiteCaBePO4(F,OH)
O OrthoclaseK(AlSi3O8)
FFluorine
F FluorapatiteCa5(PO4)3F
F HerderiteCaBePO4(F,OH)
NaSodium
Na AlbiteNa(AlSi3O8)
Na ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Albite (var: Cleavelandite)Na(AlSi3O8)
Na Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
MgMagnesium
Mg Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
AlAluminium
Al AlbiteNa(AlSi3O8)
Al ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al Beryl (var: Morganite)Be3Al2(Si6O18)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Albite (var: Cleavelandite)Na(AlSi3O8)
Al MicroclineK(AlSi3O8)
Al Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
Al Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Al BerylBe3Al2(Si6O18)
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al OrthoclaseK(AlSi3O8)
SiSilicon
Si AlbiteNa(AlSi3O8)
Si ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si BertranditeBe4(Si2O7)(OH)2
Si Beryl (var: Morganite)Be3Al2(Si6O18)
Si QuartzSiO2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Albite (var: Cleavelandite)Na(AlSi3O8)
Si MicroclineK(AlSi3O8)
Si Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
Si BerylBe3Al2(Si6O18)
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si Garnet GroupX3Z2(SiO4)3
Si OrthoclaseK(AlSi3O8)
PPhosphorus
P FluorapatiteCa5(PO4)3F
P HydroxylherderiteCaBe(PO4)(OH,F)
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P HerderiteCaBePO4(F,OH)
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K MicroclineK(AlSi3O8)
K Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca FluorapatiteCa5(PO4)3F
Ca HydroxylherderiteCaBe(PO4)(OH,F)
Ca Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca HerderiteCaBePO4(F,OH)
MnManganese
Mn Tapiolite(Fe,Mn)(Ta,Nb)2O6
Mn RhodochrositeMnCO3
Mn Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Mn Tantalite(Mn,Fe)(Ta,Nb)2O6
Mn Tantalite-(Mn)Mn2+Ta2O6
FeIron
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe Tapiolite(Fe,Mn)(Ta,Nb)2O6
Fe Columbite-(Fe)Fe2+Nb2O6
Fe Tantalite-(Fe)Fe2+Ta2O6
Fe Tantalite(Mn,Fe)(Ta,Nb)2O6
SrStrontium
Sr Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
NbNiobium
Nb Tapiolite(Fe,Mn)(Ta,Nb)2O6
Nb Columbite-(Fe)Fe2+Nb2O6
Nb Tantalite(Mn,Fe)(Ta,Nb)2O6
SnTin
Sn CassiteriteSnO2
BaBarium
Ba Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
TaTantalum
Ta Tapiolite(Fe,Mn)(Ta,Nb)2O6
Ta Microlite GroupA2-mTa2X6-wZ-n
Ta Tantalite-(Fe)Fe2+Ta2O6
Ta Tantalite(Mn,Fe)(Ta,Nb)2O6
Ta Tantalite-(Mn)Mn2+Ta2O6
UUranium
U AutuniteCa(UO2)2(PO4)2 · 11H2O

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Neoproterozoic
541 - 1000 Ma



ID: 3189927
Neoproterozoic crystalline metamorphic rocks

Age: Neoproterozoic (541 - 1000 Ma)

Lithology: Low grade unclassified metamorphic rock

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Pecora, W.T., Switzer, G., Barbosa, A.L., Myers, A.T. (1950) Structure and mineralogy of the Golconda pegmatite, Minas Gerais, Brazil. American Mineralogist, 35(9-10), 889-901.
Moore, T.P. (1993) What's new in Minerals: Tucson Show 1993. The Mineralogical Record 24:3, 222 (on a find of bertrandite).
Morteani, G., Preinfalk, C., Horn, A.H. (2000) Classification and mineralization potential of the pegmatites of the Eastern Brazilian Pegmatite Province. Mineralium Deposita, 35:7, 638-655.
USGS (2005) Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10066333.
Kievlenko, E.Ya. (2003) Geology of Gems. (Soregaroli, A. ed), Ocean Pictures Ltd., Littleton, Colorado, 468 pages.

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