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Emerald mines, Campos Verdes, Santa Terezinha de Goiás district, Goiás, Brazili
Regional Level Types
Emerald minesGroup of Mines
Campos Verdes- not defined -
Santa Terezinha de Goiás districtDistrict
Goiás- not defined -
BrazilCountry

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Key
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Latitude & Longitude (WGS84):
14° 15' 55'' South , 49° 39' 42'' West
Latitude & Longitude (decimal):
Locality type:
Group of Mines
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Crixás11,559 (2012)45.7km


Emeral deposit, associated with ductile shear zones cutting mafic and ultramafic rocks. Emeralds occur in phlogopitites and phlogopitized talc-carbonate schists. Unlike all other Brailian deposits, the Santa Terezinha deposit is not associated with pegmatites.

The mines were discovered in the 1980's about 20 km N of Santa Terezinha de Goiás. Around the mines, a new city was formed, which is now the administrative center of the new Campos Verdes municipality.

Regions containing this locality

South America PlateTectonic Plate
South AmericaContinent

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Beryl
Formula: Be3Al2(Si6O18)
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Beryl var: Emerald
Formula: Be3Al2(Si6O18)
Reference: Giuliani, Gaston; Cheilletz, Alain; Zimmermann, Jean-Louis; Ribeiro-Althoff, Ana Maria; France-Lanord, Christian; Feraud, Gilbert (1997): Brazilian emerald deposits: genesis and topology. Chronique de la Recherche Minière, 65, 17-61.; Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Hematite
Formula: Fe2O3
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Ilmenite
Formula: Fe2+TiO3
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Quartz
Formula: SiO2
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Rutile
Formula: TiO2
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Spinel
Formula: MgAl2O4
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Talc
Formula: Mg3Si4O10(OH)2
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: Emeralds of the World English extraLapis Vol. 2 2002 pp24-35

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Spinel4.BB.05MgAl2O4
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
var: Emerald9.CJ.05Be3Al2(Si6O18)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Talc9.EC.05Mg3Si4O10(OH)2
Unclassified Minerals, Rocks, etc.
'Garnet Group'-X3Z2(SiO4)3
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Spinel7.2.1.1MgAl2O4
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Beryl
var: Emerald
-Be3Al2(Si6O18)
'Garnet Group'-X3Z2(SiO4)3
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H TalcMg3Si4O10(OH)2
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
BeBeryllium
Be Beryl (var: Emerald)Be3Al2(Si6O18)
Be BerylBe3Al2(Si6O18)
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
OOxygen
O Beryl (var: Emerald)Be3Al2(Si6O18)
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Garnet GroupX3Z2(SiO4)3
O QuartzSiO2
O SpinelMgAl2O4
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O HematiteFe2O3
O TalcMg3Si4O10(OH)2
O RutileTiO2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O IlmeniteFe2+TiO3
O BerylBe3Al2(Si6O18)
MgMagnesium
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg SpinelMgAl2O4
Mg TalcMg3Si4O10(OH)2
AlAluminium
Al Beryl (var: Emerald)Be3Al2(Si6O18)
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al SpinelMgAl2O4
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al BerylBe3Al2(Si6O18)
SiSilicon
Si Beryl (var: Emerald)Be3Al2(Si6O18)
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Garnet GroupX3Z2(SiO4)3
Si QuartzSiO2
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si TalcMg3Si4O10(OH)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si BerylBe3Al2(Si6O18)
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
TiTitanium
Ti RutileTiO2
Ti IlmeniteFe2+TiO3
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe HematiteFe2O3
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe IlmeniteFe2+TiO3

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: 3187032
Neoproterozoic crystalline metamorphic rocks

Age: Neoproterozoic (541 - 1000 Ma)

Lithology: Medium-high 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]

Cryogenian
635 - 720 Ma



ID: 2286319
Talco xisto e biotitito com esmeralda Litofácies

Age: Cryogenian (635 - 720 Ma)

Lithology: Chlorite schist, talc schist

Reference: Geological Survey of Brazil. State Geological Maps of Brazil. CPRM - Geobank. [43]

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)
Gems & Gemology 20 (1984), 4-13.
Giuliani, Gaston; Cheilletz, Alain; Zimmermann, Jean-Louis; Ribeiro-Althoff, Ana Maria; France-Lanord, Christian; Feraud, Gilbert (1997): Brazilian emerald deposits: genesis and topology. Chronique de la Recherche Minière, 65, 17-61.
Groat, L.A., Giuliani, G., Marshall, D.D., and Turner, D. (2008): Emerald deposits and occurrences: A review. Ore Geology Reviews 34, 87-112.


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