Grota do Coxo mine, Jacobina, Bahia, Brazili
| Regional Level Types | |
|---|---|
| Grota do Coxo mine | Mine |
| Jacobina | Municipality |
| Bahia | State |
| Brazil | Country |
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Latitude & Longitude (WGS84):
11° South , 40° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~57km
Type:
Köppen climate type:
Mindat Locality ID:
310659
Long-form identifier:
mindat:1:2:310659:7
GUID (UUID V4):
a63e0983-9d10-45a1-97da-3017aa081cd5
Other/historical names associated with this locality:
Jacobina mine; Jacobina deposit
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 ElementsDetailed Mineral List:
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Quartz var. Amethyst Formula: SiO2 |
| ⓘ Quartz var. Ferruginous Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz var. Amethyst | 4.DA.05 | SiO2 |
| ⓘ | 4.DA.05 | SiO2 | |
| ⓘ | var. Ferruginous Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz var. Amethyst | SiO2 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Quartz var. Ferruginous Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz var. Amethyst | SiO2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Quartz var. Ferruginous Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Pyrite | FeS2 |
Other Regions, Features and Areas containing this locality
Brazil
- Bahia
- Jacobina gold districtMining District
- Serra de JacobinaMountain Range
South AmericaContinent
South America PlateTectonic Plate
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References
