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 Central Iberian Zone [es],^[1] it is located in the western part of a narrow E–W metamorphic belt.^[2] 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.^[3]

A mining site for the extraction of lithium, tin, niobium and tantalium is located in La Fregeneda area.^[4]

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. doi:10.1180/002646199548709. S2CID 53619076.
• Roda, E.; Vieira, R.; Lima, R; Pesquera, A; Noronha, F; Fontán, F (2007). "The Fregeneda – Almendra pegmatitic field (Spain & Portugal): mineral assemblages and regional zonation" (PDF). Granitic Pegmatites: The State of the Art – International Symposium. 06th – 12th May 2007, Porto, Portugal.
• Roda-Robles, E.; Pesquera, A; Gil-Crespo, P. P.; Vieira, R.; Lima, A; Garate-Olave, I.; Martins, T; Torres-Ruiz, J (2016). "Geology and mineralogy of Li mineralization in the Central Iberian Zone (Spain and Portugal)" (PDF). Mineralogical Magazine. 80 (1): 103–126. doi:10.1180/minmag.2016.080.049. S2CID 131486042. Archived from the original (PDF) on 29 April 2020.
• Roda-Robles, Encarnación; Vieira, Romeu; Pesquera, Alfonso; Lima, Alexandre (2010). "Chemical variations and significance of phosphates from the Fregeneda-Almendra pegmatite field, Central Iberian Zone (Spain and Portugal)". Mineralogy and Petrology. 100 (1–2): 23–34. doi:10.1007/s00710-010-0117-7. S2CID 131665018.