Espadanal Mines, Rio Maior, Rio Maior, Santarém, Portugali
| Regional Level Types | |
|---|---|
| Espadanal Mines | Group of Mines (Inactive) |
| Rio Maior | Civil Parish |
| Rio Maior | Municipality |
| Santarém | District |
| Portugal | Country |
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Latitude & Longitude (WGS84):
39° 20' 32'' North , 8° 55' 50'' West
Latitude & Longitude (decimal):
Type:
Group of Mines (Inactive) - last checked 2026
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Rio Maior | 12,064 (2018) | 0.9km |
| Benedita | 8,556 (2012) | 9.8km |
| Alvorninha | 2,987 (2018) | 10.1km |
| A dos Francos | 1,701 (2018) | 10.3km |
| Vidais | 1,155 (2018) | 10.6km |
Name(s) in local language(s):
Campo Mineiro da Quinta da Várzea e do Espadanal, Rio Maior, Rio Maior, Distrito de Santarém, Portugal
Inactive coal (lignite) and diatomite mines – 1914/1915 to 1969.
The Rio Maior basin, formed during the Upper Pliocene, contains alternating layers of lignite and diatomite, separated by sands and clays, with a total thickness of approximately 110 meters. This sequence is overlain by 60 meters of clayey-sandy deposits and rests on sands, mainly kaolinite-bearing siliceous sands.
- Main mineralizations: lignite.
- Morphology: stratiform.
- Host rocks: sands, clays.
- Local geology: Upper Kimmeridgian sandstones containing plant and dinosaur remains; Vilafranca layers with lignite and diatomite deposits from Rio Maior.
-Regional geology: Undifferentiated Upper Jurassic; undifferentiated Plio-Pleistocene.
- Mining concessions: 1573, 1579, 1580, 1598, 1599, 792, 972
Source: Siorminp
A bacia de Rio Maior, formada no Pliocénico Superior, contem uma alternância de camadas de lignito e de diatomito, separadas por areias e argilas, com uma espessura da ordem dos 110 m; este conjunto está coberto por 60 m de formação argilo-arenosa e repousa sobre areias (sobretudo areias siliciosas cauliníferas).
- Mineralizações principais: lignito; morfologias: estratiforme; rochas encaixantes: areias, argilas.
- Geologia local: Grés Superiores do Kimmeridgiano com vegetais e dinossáurios. Camadas Vilafranquianas com lignitos e diatomitos de Rio Maior.
- Geologia regional: Jurássico Superior indiferenciado. Plio-plistocénico indiferenciado.
- Concessões: 1573, 1579, 1580, 1598, 1599, 792, 972
Fonte: Siorminp
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Opal | 4.DA.10 | SiO2 · nH2O |
| Unclassified | |||
| ⓘ | 'Jet' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Opal | SiO2 · nH2O |
| O | Oxygen | |
| O | ⓘ Opal | SiO2 · nH2O |
| Si | Silicon | |
| Si | ⓘ Opal | SiO2 · nH2O |
Mindat Articles
Rio Maior Lignite and Diatomite Mines by Rui NunesOther Regions, Features and Areas containing this locality
Eurasian PlateTectonic Plate
- Iberian Rifted MarginPassive Margin
EuropeContinent
Iberian PeninsulaPeninsula
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Espadanal Mines, Rio Maior, Rio Maior, Santarém, Portugal