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Latadas Mines, São Salvador, Mirandela, Bragança, Portugali
Regional Level Types
Latadas MinesGroup of Mines
São Salvador- not defined -
Mirandela- not defined -
BragançaDistrict
PortugalCountry

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Name(s) in local language(s):Minas de Latadas, São Salvador, Mirandela, Distrito de Bragança, Portugal
Latitude & Longitude (WGS84): 41° 26' 35'' North , 7° 7' 36'' West
Latitude & Longitude (decimal): 41.44329,-7.12679
GeoHash:G#: ez6gvbd2t
Locality type:Group of Mines
Köppen climate type:Csb : Warm-summer Mediterranean climate


Au-Ag occurrences

Mining concessions:
No. 2184 Portela no. 1 (As-Au-Ag), registered on 18-12-1946
No. 2185 Latadas (As-Au-Ag), registered on 18-12-1946
No. 2183 Vale do Pereiro (As-Au-Ag), registered on 16-12-1946



Ocorrências de ouro - disseminadas e filonianas ligadas a distintas formações vulcano-sedimentares.
Ocorrências de ouro - filonianas, stockwerks e massas silicificadas em metassedimentos paleozóicos, afectados por cisalhamentos, carreamentos ou desligamentos tardios.
Génese: epigenética, hidrotermal e alteração supergénica. Em geral dá-se um enchimento filoniano inicial com quartzo branco e raros sulfuretos, um pouco de scheelite e muito pouco ouro; segue-se reactivação tectónica e nova precipitação de sulfuretos (que ocupam juntas e fissuras da ganga quartzosa); ouro e prata; movimentos cisalhantes, recristalização parcial de quartzo que fica cinzento e depósito da paragénese tardia de Zn, Pb, Sb, Cu e Ag, a que está associado o essencial do ouro. Em Vale do Seixo a origem do ouro não é só hidrotermal, tendo-se descoberto ouro livre em concentrações com interesse económico em brechas vulcânicas, que se admitiu serem brechas riolíticas, com disseminações de arsenopirite, arsenatos de Fe, óxidos de Fe e antimonatos de Pb e Bi.
Descrição geológica: filão-falha quartzoso, com direcção N 80º W, pendor 85º S e possança até 15,0 m com andamento superior a 6 km. Existem sectores tectonicamente reactivados e enriquecidos em Au e Ag que foram investigados pelo SFM em áreas das concessões nº 2376 (sanjas A, B e O), 2188 (sanja 1), 2187 (galeria 1 e desmonte 1), 2183 (sanjas 3A, 4, 4B e 5) e galerias 3 e 3A) e 2184 (sanja 10).
Geologia local: O filão-falha de Latadas rejeita o Complexo Vulcano-silicioso, a Formação Filito-quartzítica e a Formação de Quartzitos superiores.
Geologia regional: Silúrico. Ordovícico superior.
Mineralizações principais: ouro, prata.
Mineralizações secundárias: antimonatos de Pb e Bi, argentite, arsenatos de ferro, arsenopirite (mispíquel), esfalerite, galena, matildite, pirite.
Distribuições: disseminada.
Morfologias: brecha, filão.
Gangas: quartzo, riólitos.
Rochas encaixantes: quartzitos, rochas calcossilicatadas, xistos.
in: LNEG (March 2015).

Regions containing this locality

Iberian Peninsula

Peninsula - 1,606 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1425AuAg
Arsenopyrite
Formula: FeAsS
Reference: LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1425AuAg
Galena
Formula: PbS
Reference: LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1425AuAg
Gold
Formula: Au
Reference: LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1425AuAg
Matildite
Formula: AgBiS2
Reference: LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1425AuAg
Pyrite
Formula: FeS2
Reference: LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1425AuAg
Quartz
Formula: SiO2
Reference: LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1425AuAg
Silver
Formula: Ag
Reference: LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1425AuAg
Sphalerite
Formula: ZnS
Reference: LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1425AuAg

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Gold'1.AA.05Au
'Silver'1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
'Acanthite'2.BA.35Ag2S
'Arsenopyrite'2.EB.20FeAsS
'Galena'2.CD.10PbS
'Matildite'2.JA.20AgBiS2
'Pyrite'2.EB.05aFeS2
'Sphalerite'2.CB.05aZnS
Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø = 2
Matildite3.7.1.1AgBiS2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

OOxygen
O QuartzSiO2
SiSilicon
Si QuartzSiO2
SSulfur
S AcanthiteAg2S
S ArsenopyriteFeAsS
S GalenaPbS
S MatilditeAgBiS2
S PyriteFeS2
S SphaleriteZnS
FeIron
Fe ArsenopyriteFeAsS
Fe PyriteFeS2
ZnZinc
Zn SphaleriteZnS
AsArsenic
As ArsenopyriteFeAsS
AgSilver
Ag AcanthiteAg2S
Ag MatilditeAgBiS2
Ag SilverAg
AuGold
Au GoldAu
PbLead
Pb GalenaPbS
BiBismuth
Bi MatilditeAgBiS2

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

Early Devonian - Ordovician
393.3 - 485.4 Ma



ID: 3130370
Ordovician quartzite

Age: Paleozoic (393.3 - 485.4 Ma)

Description: low grade metamorphic

Lithology: Major:{quartzite}, Minor{phyllite,shale/slate,meta-volcanic rock group}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Ordovician
443.8 - 485.4 Ma



ID: 3185519
Paleozoic sedimentary rocks

Age: Ordovician (443.8 - 485.4 Ma)

Comments: Cantabrian Orogen

Lithology: Sedimentary rocks

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]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


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