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Jacobina gold district, Bahia, Brazili
Regional Level Types
Jacobina gold districtMining District
BahiaState
BrazilCountry

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PhotosSearch
05527440015973817253853.jpg
Fuchsite

Jacobina gold district, Bahia, Brazil
09686760015700977334975.jpg
Fuchsite

Jacobina gold district, Bahia, Brazil
03933490014988540799444.jpg
Gold, etc.

Jacobina gold district, Bahia, Brazil
02353580015969049017105.jpg
Fuchsite

Jacobina gold district, Bahia, Brazil
07639460015700554098654.jpg
Fuchsite

Jacobina gold district, Bahia, Brazil
03957260014988189282608.jpg
Gold, etc.

Jacobina gold district, Bahia, Brazil
05527440015973817253853.jpg
Fuchsite

Jacobina gold district, Bahia, Brazil
09686760015700977334975.jpg
Fuchsite

Jacobina gold district, Bahia, Brazil
Type:
Mining District
Mindat Locality ID:
24818
Long-form identifier:
mindat:1:2:24818:0
GUID (UUID V4):
3454fe90-22bb-496b-9f21-eb8209616781


The Jacobina gold district comprises the Canavieiras, Itapicuru and João Belo mines which are located south of Jacobina. The deposits are hosted in Paleoproterozoic metaconglomerates and quartzites. They were mined from 1983 to 1998 and produced about 20 tons of gold.

Sauer (1982, p. 86, about amethyst): "The Lavra do Coxo deposit, otherwise known as Jacobina, is perhaps the most beautiful and grandiose in Brazil. It is located west-northwest of Salvador in the centre of Bahia state. The landscape is formed by towering quartzite ranges, separated by deep valleys, part of the "Supergrupo Minas" geological complex. Discovered more than fifty years ago, the deposit coincides with a vertical sheared zone, parallel to the regional vector, where gigantic quartzite blocks tumbled over each other. The cavities of this mind-boggling chaos are lined with amethyst, in layers frequently covering more than several dozen square metres. Crystals of diametres often exceeding ten centimetres, display a deep violet colour, verging on black, in their upper extremity. The base ranges from hyaline to translucent, with hematite and pyrite rims. Most crystals are of superlative quality, and easy to separate from the gangue."

Sauer (1982, p. 96): "A few years ago, marvelous groups of hematoid quartz crystals were discovered in the Jacobina amethyst mine, state of Bahia." [possibly referring to the Coxo mine?]

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

10 valid minerals.

Rock Types Recorded

Note: 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

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Andalusite
Formula: Al2(SiO4)O
ⓘ Chromite
Formula: Fe2+Cr3+2O4
ⓘ Gold
Formula: Au
ⓘ Hematite
Formula: Fe2O3
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Fuchsite
Formula: K(Al,Cr)3Si3O10(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Amethyst
Formula: SiO2
ⓘ Quartz var. Ferruginous Quartz
Formula: SiO2
ⓘ Rutile
Formula: TiO2
ⓘ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
ⓘ Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘGold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘQuartz
var. Amethyst		4.DA.05SiO2
ⓘ4.DA.05SiO2
ⓘvar. Ferruginous Quartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
Group 9 - Silicates
ⓘZircon9.AD.30Zr(SiO4)
ⓘAndalusite9.AF.10Al2(SiO4)O
ⓘMuscovite
var. Fuchsite		9.EC.15K(Al,Cr)3Si3O10(OH)2
ⓘ9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
Hⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
BBoron
Bⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
OOxygen
Oⓘ Quartz var. AmethystSiO2
Oⓘ AndalusiteAl2(SiO4)O
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Oⓘ HematiteFe2O3
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ RutileTiO2
Oⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oⓘ ZirconZr(SiO4)
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Quartz var. Ferruginous QuartzSiO2
AlAluminium
Alⓘ AndalusiteAl2(SiO4)O
Alⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ Quartz var. AmethystSiO2
Siⓘ AndalusiteAl2(SiO4)O
Siⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ ZirconZr(SiO4)
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siⓘ Quartz var. Ferruginous QuartzSiO2
SSulfur
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
KPotassium
Kⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
TiTitanium
Tiⓘ RutileTiO2
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
Crⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
FeIron
Feⓘ ChromiteFe2+Cr23+O4
Feⓘ HematiteFe2O3
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
ZrZirconium
Zrⓘ ZirconZr(SiO4)
AuGold
Auⓘ GoldAu

Localities in this Region

Brazil

Other Regions, Features and Areas that Intersect

Brazil
South America PlateTectonic Plate

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

Sauer, J.R. (1982) Brazil, Paradise of Gemstones. Gemological Institute of America, 135 pp. (pp. 22, 82-83, 86, 96, 98, 124).
Thorman, C.H., DeWitt, E., Maron, M.A.C., and Ladeira, E.A. (2001) Major Brazilian gold deposits - 1982 to 1999. Mineralium Deposita, 36, 218-227. DOI 10.1007/s001260100170
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