Samarium-Neodymium Direct Dating of Fluorite Mineralization
- 17 May 1991
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 252 (5008), 949-951
- https://doi.org/10.1126/science.252.5008.949
Abstract
The direct dating of many styles of hydrothermal mineralization has proved difficult, limiting understanding of the geological processes that lead to crustal fluid flow and the formation of major ore deposits. The hydrothermal mineral fluorite (CaF2) displays large variations in rare earth element (REE) abundance and samarium/neodymium ratios within a single vein. Samarium-neodymium dating of fluorite from the classic granite-hosted tin deposits of southwest England demonstrates its use as a precise chronometer of mineralization. The concentrations of light rare earth elements (LREEs) in the fluorites are highly variable and suggest the coeval precipitation of an LREE-rich phase as the most likely cause of the extreme variation in samarium/neodymium ratios.Keywords
This publication has 12 references indexed in Scilit:
- Sm–Nd evidence for the age and origin of a Mississippi Valley Type ore depositNature, 1990
- Evidence for long residence times of rhyolitic magma in the Long Valley magmatic system: the isotopic record in precaldera lavas of Glass MountainEarth and Planetary Science Letters, 1989
- Evolution of the Cornubian ore field, Southwest England; Part II, Mineral deposits and ore-forming processesEconomic Geology, 1989
- Chronology of granite magmatism and associated mineralization, SW EnglandJournal of the Geological Society, 1985
- The timing of early and main stage ore mineralization in Southwest CornwallEconomic Geology, 1980
- Lanthanide tetrad effect observed in marine environment.GEOCHEMICAL JOURNAL, 1979
- Fluid inclusions and mineralization at Cligga Head, Cornwall, EnglandJournal of the Geological Society, 1977
- Bearing of rare earth patterns of apatites from igneous and metamorphic rocksEarth and Planetary Science Letters, 1976
- The application of Tb/Ca-Tb/La abundance ratios to problems of fluorspar genesisMineralium Deposita, 1976
- Fine structures of mutually normalized rare-earth patterns of chondritesGeochimica et Cosmochimica Acta, 1973