SAMARIUM-NEODYMIUM DIRECT DATING OF FLUORITE MINERALIZATION

被引：105

作者：

CHESLEY, JT ^{[1
]}

HALLIDAY, AN ^{[1
]}

SCRIVENER, RC ^{[1
]}

机构：

[1] BRITISH GEOL SURVEY,EXETER EX4 6BX,ENGLAND

来源：

SCIENCE | 1991年 / 252卷 / 5008期

关键词：

D O I：

10.1126/science.252.5008.949

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：949 / 951

页数：3

共 30 条

[11] SM-ND EVIDENCE FOR THE AGE AND ORIGIN OF A MISSISSIPPI VALLEY TYPE ORE DEPOSIT [J].