ASSOCIATION OF SECONDARY Al-Li-Be-Ca-Sr PHOSPHATES IN THE SAN ELÍAS PEGMATITE, SAN LUIS, ARGENTINA

GALLISKI M. A.; CERNÝ PETR; MÁRQUEZ-ZAVALÍA M. F.; CHAPMAN R.

Mendoza

Simposio; 5th International Symposium on Granitic Pegmatites; 2011

Granitic pegmatites usually form, in the early stages of magmatic crystallization in a closed system,relatively isolated from the host rocks. However, in the late stages of formation during subsolidus hydrothermal reactions, exchange of components with country rocks can modify the pristine magmatic mineral assemblage. Particularly sensitive to these processes are the pegmatite phosphates. In thispresentation we document a secondary assemblage where early magmatic phosphates were replacedby hydrothermal phases that coexist with secondary species formed by interaction with leached cations from the host rock.