RESEARCH ON THE EFFECT OF GRAIN-SEE OF MINERALS ON METAMORPHIC REACTIONS

矿物晶粒对变质反应影响的研究

• 批准号: 14540451
• 负责人: IKEDA Takeshi
• 金额: $ 2.18万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14540451/
• 关键词: Metamorphic reaction; Grain-size of minerals; Surface energy; Transformation mechanism; Rate-determining process; 温度圧力条件; 不適合元素; 部分融解

We can not obtain information directly on physical and chemical conditions of the deeply seated crust and mantle in the past, however, the metamorphic rocks formed in a depth provide us numerous information to estimate conditions of its formation. Species and chemical composition of constituent minerals depend on the physical conditions such as temperature and pressure, whereas grain-size of minerals is controlled by thermally activated processes such as grain boudary migration and nucleation-and-growth. These two aspects closely relate each other, even though each view point has been divided into petrology and structural geology. Combination of the two subjects are required to understand physical and chemical behaviour of minerals and rocks beneath the Earth's surface.This study intended to determine physical conditions and kinematic parameters of rocks from several metamorphic regions in the world, including the Ryoke metamorphic rocks in SW Japan, the Dalradian metamorphic rocks in … More Scotland and the Lutzow-Holm Complex in East Antarctica. Several papers contributed to progress the understanding of the deep crust in the following aspects.Metamorphic facies of the Ryoke metamorphism belongs to the granulite facies, contrary to the previous understanding as amphibolite facies. Several problems were pointed out to applying the Gibbs method to low-pressure metamorphic rocks. A new technique to estimate pressure was proposed, and was applied to the Ryoke metamorphic rocks. The results show the thermobaric structure of the metamorphic region more precisely than before. The effect of minor elements in constituent minerals was evaluated with respect to the paragenetic stability. The importance of boron for the partial melting of upper crust was revealed in the Ryoke metamorphic rocks. Limit of geothermometry for high-temperature metamorphic rocks was discussed using samples from the Antarctica. Regional structure of the Lutzow-Holm Complex was characterized. Change in shape and grain-size of metamorphic minerals was revealed based on petrological, mineralogical and structural analyses. This information enabled us to discuss the anisotropic growth of mineral in a deforming media. Less

过去，我们无法直接获得有关深层地壳和地幔的物理和化学条件的信息，但是，深度形成的变质岩石为我们提供了许多信息，以估计其形成的条件。成分矿物质的物种和化学成分取决于温度和压力等物理条件，而矿物质的晶粒大小受热激活过程（例如晶粒横向迁移和成核和成核和增长）的控制。即使每个观点都分为岩石学和结构地质学，这两个方面都彼此紧密相关。 Combination of the two subjects are required to understand physical and chemical behaviour of minerals and rocks beneath the Earth's surface.This study intended to determine physical conditions and kinematic parameters of rocks from several metamorphic regions in the world, including the Ryoke metamorphic rocks in SW Japan, the Dalradian metamorphic rocks in … More Scotland and the Lutzow-Holm Complex in East Antarctica.几篇论文有助于进步在以下各个方面对深层地壳的理解。瑞克变质的形态面孔属于颗粒状面孔，与先前的闪石面孔形成鲜明对比。指出一些问题将Gibbs方法应用于低压变质岩石。提出了一种估计压力的新技术，并应用于Ryoke变质岩石。结果表明，比以前更精确地表明了变质区域的热量结构。评估了副稳定性中较小元素在组成的未成年人中的影响。 ryoke变质岩石揭示了硼对上皮部分融化的重要性。使用来自南极的样品讨论了高温变质岩石的地热界限。表征了Lutzow-Holm复合物的区域结构。根据岩石学，矿物学和结构分析，揭示了变质矿物质的形状和晶粒大小的变化。这些信息使我们能够讨论变形介质中矿物质的各向异性增长。较少的

项目成果

Boron in metapelites controlled by the breakdown of tourmaline and retrograde formation of borosilicates in the Yanai area, Ryoke metamorphic belt, SW Japan

日本西南部 Ryoke 变质带柳井地区变泥岩中的硼受电气石分解和硼硅酸盐逆行形成的控制

• 发表时间: 2003
• 期刊: Contrib Mineral Petrol 145
• 作者: Kawakami T;Ikeda T
• 通讯作者: Ikeda T

Crystallographic orientation, chemical composition and three-dimensional geometry of sigmoidal garnet : evidence for rotation.

乙状石榴石的晶体取向、化学成分和三维几何形状：旋转的证据。

• 发表时间: 2002
• 期刊: J structural Geol 24
• 作者: Ikeda T;Shimobayasi N;Wallis S;Tsuchiyama A
• 通讯作者: Tsuchiyama A

Mid-Cretaceous plutono-metamorphic complex of the Ryoke and San-yo zones in the Iwakuni ミ Yanai district, SW Japan.

日本西南部岩国市柳井区 Ryoke 和 San-yo 地区的白垩纪中期火成变质杂岩。

• 发表时间: 2003
• 期刊: Hutton Symposium V Field Guidebook, Geological Survey of Japan, Interim-Report 28
• 作者: Okudaira T;Yuhara M;Ikeda T;Nakajima T
• 通讯作者: Nakajima T

Mid-Cretaceous plutono-metamorphic complex of the Ryoke and San-yo zones in the Iwakuni Yanai district, SW Japan

日本西南部岩国柳井地区 Ryoke 和 San-yo 地带的中白垩纪火成变质杂岩

• 发表时间: 2003
• 期刊: Hutton Symposium V Field Guidebook, Geological Survey of Japan 28
• 作者: Okudaira T;Yuhara M;Ikeda T;Nakajima T
• 通讯作者: Nakajima T

Regional occurrence, of orthopyroxene-bearing basic rocks in the Yanai district, SW Japan : evidence for granulite-facies Ryoke metamorphism

日本西南部柳井地区含斜方辉石基岩的区域产状：麻粒岩相 Ryoke 变质作用的证据

• 发表时间: 2002
• 期刊: The Island Arc 11
• 作者: Ikeda T