Age, Sr and Nd-Isotope Systematics, and Origin of Two Fluorite Lodes, Sierras Pampeanas, Argentina

Fluorite mineralization at the La Nueva and Bubu mines yields Sm-Nd ages of 131 ± 22 and 117 ± 26 Ma, respectively. Thus, the mineralization most probably is related to a late Gondwanian (Lower Cretaceous) extensional and magmatic event that affected the Sierras Pampeanas basement during the opening...

ver descrição completa

Detalhes bibliográficos
Autores: Galindo Francisco, María Del Carmen, Pankhurst, R.J., Casquet Martín, César, Coniglio, Jorge, Baldo, Edgardo G., Rapela, Carlos W., Saavedra, Julio
Formato: artículo
Fecha de publicación:1997
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/56993
Acesso em linha:https://hdl.handle.net/20.500.14352/56993
Access Level:acceso abierto
Palavra-chave:550.4(82)
Fluorite mineralization
Sierra Pampeana
Argentina
Geoquímica
2503 Geoquímica
Descrição
Resumo:Fluorite mineralization at the La Nueva and Bubu mines yields Sm-Nd ages of 131 ± 22 and 117 ± 26 Ma, respectively. Thus, the mineralization most probably is related to a late Gondwanian (Lower Cretaceous) extensional and magmatic event that affected the Sierras Pampeanas basement during the opening of the Atlantic Ocean. Hydrothermal fluids involved in the formation of the fluorite probably were of meteoric origin, their isotopic composition (Sr and Nd) resulting largely from the incongruent dissolution of feldspars in the host porphyritic granites.

Registos relacionados