Provenite

Panasqueira Mine

MineActiveDraft data

40.1500° N, 7.7500° W · ± 10 km

Siderite from Castelo Branco District, Portugal, with photos of specimens from this locality.

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Minerals found here

Siderite

Siderite at Panasqueira Mine

Single fan-shaped, gemmy siderite blade from Panasqueira.
Single fan-shaped, gemmy siderite blade from Panasqueira.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Second view of the fan-shaped siderite blade from Panasqueira.
Second view of the fan-shaped siderite blade from Panasqueira.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Large fluorapatite crystal accompanied by siderite from Panasqueira.
Large fluorapatite crystal accompanied by siderite from Panasqueira.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
FeCO₃
Morphology
Fan-shaped bladed crystals; also as accessory crystals on fluorapatite
Color / luster
Gemmy, translucent
Associated minerals
Fluorapatitemarcasitedolomitepyrrhotite
Availability
Unknown
History
Siderite formed mainly during the alteration of pyrrhotite (together with marcasite) and also forms cores of late dolomite crystals.

Sources: SRC-586 SRC-486 SRC-604

About Siderite →

Geology of the locality

Setting
Tungsten-tin-copper quartz-vein deposit filling fractures in schist of the Beiras Group (greywacke-schist complex) above a Variscan granite.
Type
Hydrothermal
Host rock
Schist
Region
Castelo Branco District
Country
Portugal

Operated by Beralt Tin and Wolfram (Almonty Industries); first registered in 1898 and worked almost continuously since 1901. Coordinates are minute-level values from Wikipedia.

Sources: SRC-486

Sources

  1. SRC-486 · Website
    PanasqueiraWikipedia contributors · Wikipedia
  2. SRC-586 · Book
    Handbook of Mineralogy - SideriteAnthony, J.W.; Bideaux, R.A.; Bladh, K.W.; Nichols, M.C. · 2005 · Mineral Data Publishing / Mineralogical Society of America
  3. SRC-604 · Website
    File:Siderite-119084.jpgRobert M. Lavinsky · Wikimedia Commons

Draft data from the Provenite workbook. Check entries against the cited sources before relying on them. Photos are open-licence images from Wikimedia Commons; the author and licence are given with each photo.