四川大陆槽稀土矿床碳酸岩-英碱正长岩锆石U-Pb年代学和Hf同位素性质及其地质意义

田世洪,侯增谦,杨竹森,杨志明,袁忠信,王彦斌,谢玉玲,刘英超,李政. 四川大陆槽稀土矿床碳酸岩-英碱正长岩锆石U-Pb年代学和Hf同位素性质及其地质意义[J]. 岩石学报, 2008, 24(3).
引用本文: 田世洪,侯增谦,杨竹森,杨志明,袁忠信,王彦斌,谢玉玲,刘英超,李政. 四川大陆槽稀土矿床碳酸岩-英碱正长岩锆石U-Pb年代学和Hf同位素性质及其地质意义[J]. 岩石学报, 2008, 24(3).
Zircon U-Pb ages,Hf isotopic compositions and geological significance: A case study of carbonatite and nordmarkite from the Dalucao REE deposit, Sichuan province[J]. Acta Petrologica Sinica, 2008, 24(3).
Citation: Zircon U-Pb ages,Hf isotopic compositions and geological significance: A case study of carbonatite and nordmarkite from the Dalucao REE deposit, Sichuan province[J]. Acta Petrologica Sinica, 2008, 24(3).

四川大陆槽稀土矿床碳酸岩-英碱正长岩锆石U-Pb年代学和Hf同位素性质及其地质意义

  • 基金项目:

    国家杰出青年基金 , 国家自然科学青年基金 , 国家重点基础研究发展规划项目 , 中央级公益性科研院所基本科研业务费专项资金 , 南京大学内生金属矿床成矿机制研究国家重点实验室资金 , 国家自然科学面上基金 , 中国地质科学院重点开放实验室专项资金

Zircon U-Pb ages,Hf isotopic compositions and geological significance: A case study of carbonatite and nordmarkite from the Dalucao REE deposit, Sichuan province

  • 川西冕宁-德昌稀土成矿带是中国最重要的稀土成矿带之一,所有稀土矿床均与碳酸岩-正长岩杂岩体有关.前人研究表明,牦牛坪、木落寨和里庄碳酸岩-碱性杂岩体成岩年龄与其相应矿床的成矿年龄基本一致,而大陆槽正长岩年龄与REE矿床的成矿年龄相差甚远.本文对大陆槽碳酸岩、英碱正长岩进行了SHRIMP U-Pb锆石年代学和LA-MC-ICPMS锆石Hf同位素原位测量,它们的形成年龄分别为12.99±0.94Ma、14.53±0.31Ma,表明两者是同时形成的,且与其成矿年龄基本一致.碳酸岩和正长岩的εHf(t)值、Hf模式年龄与它们的εNd(t)值、Nd模式年龄所展现出来的特征一致,说明在其形成过程中有地壳物质的加入.
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刊出日期:  2008-03-31

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