摘要
六陈花岗岩体是中国唯一产有铀矿床的海西期花岗岩体。笔者首次测得该岩石的Rb-Sr同位素等时线年龄为283.32±14.2Ma,^(87)Sr/^(86)Sr初始值为0.716;δ^(18)O=9.9‰—11.2‰(平均值10.6‰),δ^(34)S=8.7‰—13.1‰(平均值11.2‰);^(206)Pb/^(204)Pb=18.58—22.33(平均值19.74),^(207)Pb/^(204)Pb=15.22—16.14(平均值15.66),^(208)Pb/^(204)Pb=37.93—38.94(平均值38.49)。根据所获得的数据对同位素的地质意义进行了探讨。
The Liuchen granite is the only Hercynian granitic body bearing uranium ore deposit in China. The Rb-Sr isochron age of the Liuchen granite determined for the first time by the authors is 283.32±14. 2Ma (synchronous with Hercynian age), with an initial87 Sr/86Sr ratio of 0. 716, δ18O = 9. 9‰ to 11. 2‰ (mean 10. 6‰),δ34S 8. 7‰ to 13.1‰ (mean 11. 2‰) ,206Pb/204Pb=18. 58-22.33(mean 19. 74) ,207Pb/204Pb = 15. 22-16. 14 (mean 15. 66) and208Pb/204Pb = 37. 93-38. 94 (mean 38. 49). The geological implications of the isotopes are discussed according to the above-mentioned data.
出处
《地质论评》
CAS
CSCD
北大核心
1995年第1期48-51,共4页
Geological Review
