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Mercedes-Aceitillar mining district, Pedernales, Pedernales Province, Dominican Republici
| Regional Level Types | |
|---|---|
| Mercedes-Aceitillar mining district | Mining District |
| Pedernales | Municipality |
| Pedernales Province | Province |
| Dominican Republic | Country |
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Latitude & Longitude (WGS84):
18° North , 71° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~66km
Type:
Köppen climate type:
Karst bauxite exposures show variable sizes (e.g., Las Mercedes, the largest deposit in the district, is ~10 km2 in area) and thicknesses, with bauxitic profiles ranging from a few to several tens of meters. As particularly evident in historical mining pits such as Las Mercedes and Aceitillar, most bauxite deposits lack sedimentary overburden and display blanket morphologies that fill karst depressions, interrupted by sporadic carbonate pillars of bedrock limestone. In smaller bauxite occurrences and indices, karst bauxites manifest as pocket-like accumulations and infills within irregular, intricate tunnel networks of the karst system. The bauxitic material is reddish brown, fine grained, and mostly unconsolidated. A distinctive feature at the outcrop scale in the KM-30 deposit (“El Turco” in Villanova-de-Benavent et al., 2023) is the prominent occurrence of REY phosphates, readily visible to the naked eye as millimeter- to centimeter-thick yellow veins crosscutting the bauxite matrix. These veins are commonly associated with thinner, black Mn oxyhydroxide veinlets.
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Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities15 valid minerals.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Rutile | 4.DB.05 | TiO2 |
| ⓘ | Anatase | 4.DD.05 | TiO2 |
| ⓘ | Goethite | 4.FD.10 | Fe3+O(OH) |
| ⓘ | Gibbsite | 4.FE.10 | Al(OH)3 |
| ⓘ | Nordstrandite | 4.FE.10 | Al(OH)3 |
| ⓘ | Böhmite | 4.FE.15 | AlO(OH) |
| ⓘ | Lithiophorite | 4.FE.25 | (Al,Li)MnO2(OH)2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Monazite-(Ce) | 8.AD.50 | Ce(PO4) |
| ⓘ | Monazite-(La) | 8.AD.50 | La(PO4) |
| ⓘ | Churchite-(Y) | 8.CJ.50 | Y(PO4) · 2H2O |
| Group 9 - Silicates | |||
| ⓘ | Vermiculite | 9.EC.50 | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
| ⓘ | Kaolinite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| Unclassified | |||
| ⓘ | 'Bastnäsite' | - | (Ce/Nd/Y/REE)(CO3)F |
| ⓘ | 'Monazite Group' | - | REE(PO4) |
| ⓘ | 'Rhabdophane' | - | |
| ⓘ | 'Wad' | - | |
| ⓘ | 'Xenotime' | - | |
| ⓘ | 'Florencite' | - | |
| ⓘ | 'Smectite Group' | - | A0.3D2-3[T4O10]Z2 · nH2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Böhmite | AlO(OH) |
| H | ⓘ Churchite-(Y) | Y(PO4) · 2H2O |
| H | ⓘ Gibbsite | Al(OH)3 |
| H | ⓘ Goethite | Fe3+O(OH) |
| H | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| H | ⓘ Lithiophorite | (Al,Li)MnO2(OH)2 |
| H | ⓘ Nordstrandite | Al(OH)3 |
| H | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
| H | ⓘ Smectite Group | A0.3D2-3[T4O10]Z2 · nH2O |
| Li | Lithium | |
| Li | ⓘ Lithiophorite | (Al,Li)MnO2(OH)2 |
| C | Carbon | |
| C | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Anatase | TiO2 |
| O | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| O | ⓘ Böhmite | AlO(OH) |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Churchite-(Y) | Y(PO4) · 2H2O |
| O | ⓘ Gibbsite | Al(OH)3 |
| O | ⓘ Goethite | Fe3+O(OH) |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| O | ⓘ Lithiophorite | (Al,Li)MnO2(OH)2 |
| O | ⓘ Monazite Group | REE(PO4) |
| O | ⓘ Monazite-(Ce) | Ce(PO4) |
| O | ⓘ Monazite-(La) | La(PO4) |
| O | ⓘ Nordstrandite | Al(OH)3 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rutile | TiO2 |
| O | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
| O | ⓘ Smectite Group | A0.3D2-3[T4O10]Z2 · nH2O |
| F | Fluorine | |
| F | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| Mg | Magnesium | |
| Mg | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
| Al | Aluminium | |
| Al | ⓘ Böhmite | AlO(OH) |
| Al | ⓘ Gibbsite | Al(OH)3 |
| Al | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Al | ⓘ Lithiophorite | (Al,Li)MnO2(OH)2 |
| Al | ⓘ Nordstrandite | Al(OH)3 |
| Al | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
| Si | Silicon | |
| Si | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
| P | Phosphorus | |
| P | ⓘ Churchite-(Y) | Y(PO4) · 2H2O |
| P | ⓘ Monazite Group | REE(PO4) |
| P | ⓘ Monazite-(Ce) | Ce(PO4) |
| P | ⓘ Monazite-(La) | La(PO4) |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ti | Titanium | |
| Ti | ⓘ Anatase | TiO2 |
| Ti | ⓘ Rutile | TiO2 |
| Mn | Manganese | |
| Mn | ⓘ Lithiophorite | (Al,Li)MnO2(OH)2 |
| Fe | Iron | |
| Fe | ⓘ Goethite | Fe3+O(OH) |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
| Y | Yttrium | |
| Y | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| Y | ⓘ Churchite-(Y) | Y(PO4) · 2H2O |
| La | Lanthanum | |
| La | ⓘ Monazite-(La) | La(PO4) |
| Ce | Cerium | |
| Ce | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| Ce | ⓘ Monazite-(Ce) | Ce(PO4) |
| Nd | Neodymium | |
| Nd | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
Localities in this Region
- Pedernales Province
- Pedernales
- Mercedes-Aceitillar mining district
- Pedernales
- Pedernales Province
- Pedernales
- Mercedes-Aceitillar mining district
- Pedernales
Other Regions, Features and Areas containing this locality
Caribbean PlateTectonic Plate
North America
- Central AmericaSubregion
North America Plate
- Nicaragua PlateauOphiolite Complex
The CaribbeanRegion
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References
Domínguez-Carretero, Diego; Villanova-de-Benavent, Cristina; Torró, Lisard; Pujol-Solà, Núria; Bover-Arnal, Telm; Mestre, Àngel; Aiglsperger, Thomas; Ramírez, Australia; Rodríguez, Jesús; Espaillat, Julio; et al. (2025) Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic. Geologica Acta, 23. p.1-18. doi:10.1344/geologicaacta2025.23.9
Chappell, Mark; Rojas, Harold; Andros, Charles; Acree, Autumn; Masue-Slowey, Yoko; Young, Christine; Fowler, Paige; Lotufo, Elizabeth; Rowland, Wesley; Wynter, Michelle; et al. (2025) Geochemical exploration of rare earth element resources in highland karstic bauxite deposits in the Sierra de Bahoruco, Pedernales Province, Southwestern Dominican Republic. PLOS ONE, 20 (1). p.e0315147. doi:10.1371/journal.pone.0315147
[1]Domínguez-Carretero, Diego; Aiglsperger, Thomas; Villanova-de-Benavent, Cristina; Torró, Lisard; Pujol-Solà, Núria; Llovet, Xavier; Bover-Arnal, Telm; Tisora, Àngel; Domènech, Cristina; Ramírez, Australia; et al. (2026) Rare Earth Element and Yttrium (REY) Hyper-Enriched Karst Bauxites of the Mercedes-Aceitillar Mining District, Sierra de Bahoruco, SW Dominican Republic. Economic Geology, 121 (3). doi:10.5382/econgeo.5214
