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Teso de la Calera pegmatite, Pinilla de Fermoselle, Villar del Buey, Zamora, Castile and Leon, Spain
Heterosite
Teso de la Calera pegmatite, Pinilla de Fermoselle, Villar del Buey, Zamora, Castile and Leon, Spain
Photo: Jodani
Teso de la Calera pegmatite, Pinilla de Fermoselle, Villar del Buey, Zamora, Castile and Leon, Spain
Photo: Jodani
A highly fractionated, Li-F-Be-B-P-bearing granite pegmatite in calc-alkaline granite and hornfels.
Appears as a cupola over a PF leucogranite, displaying a non-symmetrical internal zonation with a complete sequence from a barren pegmatitic facies near the granite, to a highly evolved zone in the uppermost part of the body.
Al-rich micas show a continuous evolution from muscovitic to lepidolitic compositions from the leucogranite to the most evolved zone. Fe-rich micas range from Fe-biotite in the leucogranite and in the least evolved pegmatite zones, to an intermediate composition between zinnwaldite and trilithionite in the most evolved pegmatitic facies (Roda-Robles et al., 2006).
The pegmatite belongs to the Arribes del Duero Natural Park, so collecting activities are restricted.
Refs.:
- Roda, E. et al. (1998). "The Fe-Mn phosphate associations from the Pinilla de Fermoselle pegmatite, Zamora, Spain: occurence of kryzhanovskite and natrodufrénite." European Journal of Mineralogy, 10(1).
- American Mineralogist (2005): 1887-1899.
- Roda-Robles, E., Pesquera, A., Gil-Crespo, P. P., Torres-Ruiz, J. & De Parseval, P. (2006): Mineralogy and geochemistry of micas from the Pinilla de Fermoselle pegmatite (Zamora, Spain). European Journal of Mineralogy, 18, 369-377.
Mineral List
43 entries listed. 36 valid minerals.
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External Links
- http://www.foro-minerales.com/forum/viewtopic.php?t=8292 (discussion about the occurrences of this area with maps and references, in Spanish language)
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Locality Updated: Myall Lakes Reserve, Bolton, Victoria, AustraliaFrom Pat Sutton, 23rd May 2013 01:30:19
















