Ce ANOMALIES OF ISLAND ARC IGNEOUS ROCKS

岛弧火成岩的 Ce 异常

• 批准号: 11640472
• 负责人: FUJIMAKI Hirokazu
• 金额: $ 2.24万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640472/
• 关键词: RARE EARTH ELEMENT; Ce ANAMALY; ISLAND ARC VOLCANICS

A number of igneous rocks from Kuzuryu and Hakusan volcanic zones, anf Ogasawara islands have been analyzed for rare earth elements by ICP-MS, Some plutonic rocks from central Mongolia have been analyzed as well. Only some volcanic rocks from the Ogasawara islands show negative Ce anamalies. Almost all of them are rather poor in light rare earth elements. In contrast, none of the volcanic rocks from Kuzuryu and Hakusan volcanic zones show Ce anomaly. All of the rocks from the two volcanic zones are highly enriched in light rare earth elements. It seems that there appears no volanic rock with netative Ce anomaly in the matured island arc. The mongolian plutonic rocks show slight but clear Ce anomaly : this may imply that the parental crustal material of the plutonic rocks could be pre-matured island arc material.

利用ICP-MS对来自九祖柳火山区、白山火山区和小笠原群岛的多种火成岩进行了稀土元素分析，还对蒙古中部的一些深圳湾岩进行了稀土元素分析。只有小笠原群岛的火山岩显示负Ce同位素。它们几乎都是轻稀土元素贫乏的。与此相反，九流火山带和白山火山带的火山岩没有Ce异常。这两个火山岩带的岩石都高度富集轻稀土元素。在成熟岛弧中似乎不存在Ce负异常的火山岩。蒙古期深圳湾岩体具有轻微而明显的Ce异常，这可能意味着深圳湾岩体的地壳母源物质可能是早期成熟的岛弧物质。

项目成果

Fujimaki et al.: "Mantle evolution beneath the eastern Baikal region, Russia"Northeast Asian Studies. 4. 145-172 (2000)

Fujimaki等人：“俄罗斯东贝加尔地区地幔演化”东北亚研究。

Fujimaki et al.: "Geochemistry of Hannouba basalts, Wanquan County, Zhanjiakou district Hebei, northern China"Northeast Asian Studies. 4. 231-245 (2000)

Fujimaki等：“中国北部河北张家口区万全县汉诺巴玄武岩地球化学”东北亚研究。

Jargalan, S.and Fujimaki, H.: "Geology and Petrology of granitic pluton, Tsagaan Tsahir Uul, central Mongolia"Northeast Asian Studies. Vol.4. 213-230 (2000)

Jargalan, S. 和 Fujimaki, H.：“蒙古中部 Tsagaan Tsahir Uul 花岗岩岩体的地质学和岩石学”东北亚研究。

Litasov, K., Litasov.Y, Fujimaki, H., Miyamoto, T., Taniguchi, H.: "Mantleevolution the eastern Baikal region, Russia"Northeast Asian Studies. Vol.4. 145-172 (2000)

Litasov, K.、Litasov.Y、Fujimaki, H.、Miyamoto, T.、Taniguchi, H.：“俄罗斯东贝加尔地区的曼特列演化”东北亚研究。

Fujimaki & Jargalan: "Geology and Petrology of granitic Pluton, Tcaqaan Tcahir Unl, Central Mongolia"Northeast Asian Studies. 4. 213-230 (2000)

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