Rare-element Pegmatite (Albite-Spodumene)
Chemical Process (Liquid-phase Growth) - Closed system under ground (Melt precipitation)
Abbreviation
REL-Li
Classification
Albite-Spodumene type < Lithium subclass < (LCT family) < Rare-element class < Granitic pegmatite
Required Geological Setting
Occurrence
Pegmatites formed by fractional crystallization of S-type granite magma associated with upper Greenschist facies to Amphibolite facies in Barrovian-type middle-P metamorphism. The albite-spodumene type pegmatites are formed at slightly deep 0.3-0.4 Gpa and lower temperature circumstance whereas other rare-element class pegmatites emplaced at shallow depth. This formation condition is almost same as the spodumene subtype of the complex type, but more abundant in albite and quartz than K-feldspar. Pegmatites are massive and pockets are very rare. The internal structure of albite-spodumene type pegmatites shows simple zoning with the characteristic oblique arrangement of spodumene and K-feldspar crystals to the tabular pegmatite bodies. The albite-spodumene type is characterized by extremely abundant Li.
Mineral Assemblages (Major minerals)
Quartz, Orthoclase, Microcline, Albite, Muscovite, (Almandine)
Mineral Assemblages
Spodumene, (Cassiterite, Beryl, Columbite-(Fe), Tantalite-(Fe))
Localities
Related Occurrences
- Pegmatite (Abyssal)
- Pegmatite (Muscovite)
- Pegmatite (Muscovite-Rare element)
- Pegmatite (Rare element, Allanite)
- Pegmatite (Rare element, Euxenite)
- Pegmatite (Rare element, Gadolinite)
- Pegmatite (Rare element, Titanium)
- Pegmatite (Rare element, Beryl)
- Pegmatite (Rare element, Phosphate)
- Pegmatite (Rare element, Spodumene)
- Pegmatite (Rare element, Petalite)
- Pegmatite (Rare element, Lepidolite)
- Pegmatite (Rare element, Elbaite)
- Pegmatite (Rare element, Amblygonite)
- Pegmatite (Rare element, Albite-Spodumene)
- Pegmatite (Rare element, Albite)
- Pegmatite (Miarolitic, REE)
- Pegmatite (Miarolitic, Li)
- Pegmatite (Gabbro)