UHT metamorphism and fluids of the Gondwana collision zone

冈瓦纳大陆碰撞带的超高温变质作用和流体

• 批准号: 17340158
• 负责人: TSUNOGAE Toshiaki
• 金额: $ 6.39万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17340158/
• 关键词: Gondwana Supercontinent; Granulite; Fluid inclusion; Ultrahigh-temperature metamorphism; Continental Crust; Origeny

This study carried out detailed petrological and fluid inclusions studies of high-grade metamorphic rocks from South India, Antarctica, and South Africa as well as related regions, that underwent extreme crustal metamorphism at more than 1000 degree. Based on detailed mineralogical and textural observations, we could constructed metamorphic pressure and temperature paths of individual regions, and successfully discussed the origin of the high-grade terranes related to the assembly of supercontinents such as Gondwana. We further performed fluid inclusion study of the rocks and identified CO2-rich fluid inclusions trapped during the growth of minerals. Our further studies on such CO2-rich inclusions indicate that CO2 was derived from mantle and the fluid probably played an important role on stabilizing the dry mineral assemblages in the UHT rocks.

本研究对来自南印度、南极洲和南非以及相关地区的高级变质岩进行了详细的岩石学和流体包裹体研究，这些高级变质岩经历了超过1000度的极端地壳变质作用。通过详细的矿物学和结构观察，建立了各地区的变质压力和温度路径，成功地探讨了与冈瓦纳等超大陆组装有关的高级变质作用的成因。我们进一步对岩石进行了流体包裹体研究，并确定了矿物生长过程中捕获的富CO2流体包裹体。进一步研究表明，CO2来自地幔，流体对超高温岩石中干矿物组合的稳定起着重要作用。

项目成果

Corundum + quartz and Mg-staurolite bearing granulite from the Limpopo Belt, southern Africa: Implications for a P–T path

• DOI: 10.1016/j.lithos.2006.03.052
• 发表时间: 2006-12
• 期刊: Lithos
• 影响因子: 3.5
• 作者: T. Tsunogae;D. D. Reenen-D.

Fluid inclusion study of pegmatite and aplite veins of the Paleoproterozoic basement rocks in Bangladesh : implications for magmatic fluid compositions and crystallization depth

孟加拉国古元古代基岩伟晶岩和细晶岩流体包裹体研究：对岩浆流体成分和结晶深度的影响

• 发表时间: 2008
• 期刊: Journal of Mineralogical and Petrological Sciences doi : 10. 2465
• 作者: Hossain;I. and Tsunogae;T.
• 通讯作者: T.

Carbonic metamorphism at ultrahigh-temperatures: Evidence from North China Grafon

超高温下的碳变质作用：来自华北Grafon的证据

• 发表时间: 2008
• 期刊: Earth and Planetary Science Letters 266
• 作者: Santosh;M.;Tsunogae;T.;Ohyama;H.;Sato;K.;Li;J. H.;and Liu;S. J.
• 通讯作者: S. J.

Ti-free hogbomite in spinel- and sapphirine-bearing Mg-Al rock from the Palghat-Cauvery shear zone system, southern India

印度南部 Palghat-Cauvery 剪切带系统中含尖晶石和蓝宝石的镁铝岩石中的无钛菱镁矿

• 发表时间: 2005
• 期刊: Mineralogical Magazine 69・6
• 作者: 角替敏昭;M.SANTOSH
• 通讯作者: M.SANTOSH

The stability and origin of gedrite in ultrahigh-temperature Mg-Al-rich rocks from southern India

印度南部超高温富镁铝岩石中镁辉石的稳定性和成因

• 发表时间: 2007
• 作者: Kanazawa;T.;Tsunogae;T.;Ohyama;H.;and Santosh;M.
• 通讯作者: M.