Fregeneda–Almendra pegmatitic field explained

The Fregeneda–Almendra pegmatitic field is a geologic area in the Iberian Peninsula extending across the Portuguese district of Guarda and the Spanish province of Salamanca. Part of the, it is located in the western part of a narrow E–W metamorphic belt. It consists of a variety of granitic pegmatites, where some rocks are rich in lithium. The Li minerals include spodumene, petalite, lithian muscovite and montebrasite.

A mining site for the extraction of lithium, tin, niobium and tantalium is located in La Fregeneda area.^[1]

Bibliography

References

Bibliography

• Roda Robles. E.. Pesquera Pérez. A.. Velasco Roldán. F. Fontán. F. 1999. The granitic pegmatites of the Fregeneda area (Salamanca, Spain): characteristics and petrogenesis. Mineralogical Magazine. 63. 4. 535–558. 10.1180/002646199548709. 53619076.
• The Fregeneda – Almendra pegmatitic field (Spain & Portugal): mineral assemblages and regional zonation. E.. Roda. R.. Vieira. R. Lima. A. Pesquera. F. Noronha. F. Fontán. Granitic Pegmatites: The State of the Art – International Symposium. 06th – 12th May 2007, Porto, Portugal. 2007.
• Mineralogical Magazine. 2016. 80. 1. 103–126. Geology and mineralogy of Li mineralization in the Central Iberian Zone (Spain and Portugal). E.. Roda-Robles. A. Pesquera. P. P.. Gil-Crespo. R.. Vieira. A. Lima. I.. Garate-Olave. T. Martins. J. Torres-Ruiz. 10.1180/minmag.2016.080.049. 131486042. https://web.archive.org/web/20200429004539/http://www.sociedadgeologica.es/comisiones/memorias_pgg_rim/memoria_pgg_rim_excursion__r4.pdf. dead. 2020-04-29. free.
• Chemical variations and significance of phosphates from the Fregeneda-Almendra pegmatite field, Central Iberian Zone (Spain and Portugal). Encarnación. Roda-Robles. Romeu. Vieira. Alfonso. Pesquera. Alexandre. Lima. Mineralogy and Petrology. 100. 23–34. 2010. 1–2. 10.1007/s00710-010-0117-7. 131665018.

Notes and References

1. Web site: Yacimientos de Sn y Li de La Fregeneda (Mina Feli o de Alabancos). IGME.