Geochronology of Ailaoshan-Jinshajiang alkali- rich intrusive rocks and their Sr and Nd isotopic characteristics

被引：35

作者：

张玉泉

谢应雯

机构：

[1] China

[2] Guangzhou Institute of Geochemistry

[3] Chinese Academy of Sciences

[4] Guangzhou 510640

来源：

Science in China(Series D:Earth Sciences) | 1997年 / 05期

基金：

中国国家自然科学基金;

关键词：

alkali-rich intrnsive rocks; chronology; Nd and Sr isotopes;

D O I：

暂无

中图分类号：

P597 [同位素地质学与地质年代学];

学科分类号：

070902 ;

摘要：

Twenty-nine isotopic ages, ranging from 41 to 27 Ma, are presented for the alkali-rich intrusive rocks and their coexisting alkaline volcanic rocks, lamprophyres and acidic porphyries, indicating that they are Tertiary in age. The alkali-rich intrusive rocks have 143Nd/144Nd ratios from 0. 512 415 to 0. 512 544, and 87Sr/86Sr ratios from 0.705 4 to 0.706 8, suggesting that their material originates from an enriched mantle source.

引用

页码：524 / 529

页数：6

共 3 条

[1]

Crustal contamination versus enriched mantle: 143 Nd/ 144 Nd and 87 Sr/ 86 Sr evidence from the Italian volcanics[J] . C. J. Hawkesworth,R. Vollmer.Contributions to Mineralogy and Petrology . 1979 (2)

[2] NATURE OF ALKALIC VOLCANIC ROCK SERIES [J].

MIYASHIRO, A .

CONTRIBUTIONS TO MINERALOGY AND PETROLOGY, 1978, 66 (01) :91-104

[3]

Age, origin and evolution of the anorogenic complex of Evisa (Corsica): A K-Li-Rb-Sr study[J] . B. Bonin,C. Grelou-Orsini,Y. Vialette.Contributions to Mineralogy and Petrology . 1978 (4)

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