Petrogeneses of Proterozoic carbonates in Madagascar

马达加斯加元古代碳酸盐的成岩作用

• 批准号: 23403016
• 负责人: ARIMA Makoto
• 金额: $ 12.65万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23403016/
• 关键词: マダガスカル; カーボナタイト; ゴンドワナ超大陸; 炭素・酸素安定同位体; Sr同位体比; Nd同位体比; Sr-Nd同位体; マントル交代作用

Carbonatites have been identified in the Proterozoic terrain of southern Madagascar and studied for mineralogy, whole-rock geochemistry, stable C- and O-isotopes, and radiogenic Sr- and Nd-isotopes. Carbon and oxygen stable isotopes in the carbonates show magmatic differentiation form the primary mantle carbonate field toward heavier values, suggesting magmatic isotopic fractionation. Both carbonate and associated pyroxenites are characterized by extremely enriched Sr- and depleted Nd-isotope compositions. The present data imply that the studied carbonates are silicocarbonatite derived from extremely enriched sources, which were located at the upper part of lithospheric mantle.

在马达加斯加南部元古代地体中发现了碳酸盐岩，并对其进行了矿物学、全岩地球化学、稳定的碳、氧同位素和放射性成因的锶、钕同位素研究。碳酸盐岩中的碳、氧稳定同位素显示岩浆从原生地幔碳酸盐场向重的方向分异，表明岩浆同位素分馏作用。碳酸盐辉石岩和伴生辉石岩都具有极富的锶和贫化的钕同位素组成。目前的资料表明，所研究的碳酸盐岩是来自于岩石圈地幔上部的高度富集源的硅碳酸盐。

项目成果

Experimental studies of partial melting at the contact between limestone and politic gneiss. Goldschmidt 2013 Conference abstract, Firenze

石灰岩与政理片麻岩接触面部分熔融的实验研究。

• DOI: 10.1180/minmag.2013.077.5.11
• 发表时间: 2013
• 期刊: Mineralogical Magazine
• 影响因子: 2.7
• 作者: Kato;M.;Hiroi;Y.;and Arima;M.
• 通讯作者: M.

Igneous sapphirine in Ambatomena, southern Madagascar. Goldschmidt 2013 Conference abstract, Firenze

马达加斯加南部安巴托梅纳的火成蓝宝石。

• DOI: 10.1180/minmag.2013.077.5.1
• 发表时间: 2013
• 期刊: Mineralogical Magazine
• 影响因子: 2.7
• 作者: Arima;M.;Kimoto;K.;Rakotondrazafy;R.;Rakotonandrasana;N.O.T.;and Ranaivoson;M.A.
• 通讯作者: M.A.

相馬地方相馬中村層群富沢層に胚胎する相馬珪砂鉱床の形成過程

相马地区相马中村组富泽组相马硅质砂矿形成过程

• 发表时间: 2012
• 作者: Heldmann;J. L.;松原義雄
• 通讯作者: 松原義雄

India-Antarctica-Australia-Laurentia connection in thePaleo-Mesoproterozoic revisited: Evidencefrom new zircon U-Pb SHRIMP and monazitechemical age data from the Eastern GhatsBelt

重新审视古中元古代的印度-南极洲-澳大利亚-劳伦大陆联系：来自东高止山脉新锆石 U-Pb SHRIMP 和独居石化学年龄数据的证据

• DOI: 10.1130/b30336.1
• 发表时间: 2011
• 期刊: India. Geological Society of AmericaBulletin
• 作者: Bose;S.;Dunkley;D.J.;Dasgupta;S.,Das;K.;and Arima;M.
• 通讯作者: M.

Tidal rhythmites in offshore shale: A case study from the Palaeoproterozoic Chaibasa shale, eastern India and implications

• DOI: 10.1016/j.marpetgeo.2011.10.005
• 发表时间: 2012-02
• 期刊: Marine and Petroleum Geology
• 影响因子: 4.2
• 作者: L. Mallik;Rajat Mazumder;B. S. Mazumder;M. Arima;P. Chatterjee