Thermal structure and history of granitic rocks in the Dharwar craton, South India

印度南部达尔瓦尔克拉通花岗岩的热结构和历史

• 批准号: 14540427
• 负责人: KANO Takashi
• 金额: $ 1.92万
• 依托单位: Yamaguchi 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-14540427/
• 关键词: India; Dharwar Craton; Archaean; Granitic rocks; TTG; Thermal History; Thermal structure; Closepet granites; TTG; 島弧花崗岩

The Dharwar craton in South India is one of the typical Archaean continental crust in the world, and comprises the hart of Gondwana super continents. The craton is composed mainly of Peninsular gneisses originated from the early to middle Archaean TTG and late Archaean Closepet granites.1.This research Program provided systematic data on the petrographical properties of granitic rocks in the whole area of the craton, such as modal compositions and mineralogical properties of major rock forming minerals. We found that most granitic rocks contained considerable amounts of K-feldspar, and the Archaean TTG was not always poor in K-feldspar.2.K-feldspar was mostly low microcline with maximum ordering in the central to northern part of the Dharwar craton, while in the southern part of the amphibolite-granulite transition zone, orthoclase became dominant and high temperature-form K-feldspar (low sanidine) occurred in the Kerala Khondalite belt of the southern most part of India. K-feldspar in Archaean granitoids was not always low microciline, as formerly believed to be strictly low microcline.3.Geochemical studies including major and trace elements analyses suggested that, the genesis of Peninsular gneisses in the Dharwar craton was not simple ; they derived partly from early to middle Archaean TTG, and contained late Archaean granites synchronous with the Closepet granites, and then, totally metamorphosed (or poly-metamorphosed) at the time of atest Archaean.

印度南部的Dharwar craton是世界上典型的古老大陆壳之一，包括冈瓦纳超级大陆的哈特。克拉顿主要由半岛片麻岩组成，起源于早期至中期的TTG和后期的Archaean Closepet花岗岩。1。本研究计划提供了有关整个克拉顿地区花岗岩岩石岩石岩石岩石特性的系统数据，例如模态组成和矿物质学物业，以及主要岩石形成岩的矿物质岩层。 We found that most granitic rocks contained considerable amounts of K-feldspar, and the Archaean TTG was not always poor in K-feldspar.2.K-feldspar was mostly low microcline with maximum ordering in the central to northern part of the Dharwar craton, while in the southern part of the amphibolite-granulite transition zone, orthoclase became dominant and high temperature-form K-feldspar (low Sanidine）发生在印度南部大部分地区的喀拉拉邦Khondalite带。古细核酸类花岗岩中的K-Feldspar并不总是很低的微丝氨酸，这是严格的低微线。3。包括主要和微量元件分析在内的地球化学研究表明，Dharwar craton中半岛斑驳的生成的生成并不简单；它们从早期到中期的TTG派生，并包含与近距离花岗岩同步的后期古老的花岗岩，然后在彻底的古细菌时完全变态（或多型超塑形）。

项目成果

Modal and chemical compositions of Peninsular gneisses and Closepet granites in the Dharwar craton, in comparison with the Phanerozoic Island arc garnitoids of the Hida region, central Japan : A Preliminary report

达尔瓦尔克拉通半岛片麻岩和 Closepet 花岗岩的模态和化学成分与日本中部飞弹地区显生宙岛弧石榴石的比较：初步报告

• 发表时间: 2004
• 期刊: Gondwana Research 7
• 作者: Kano;T.;Jayananda;M.;Nishimura;K.;Kesamaru;T.
• 通讯作者: T.

M.Jayananda, H.Kumar, T.Kano: "Late Archaean juvenile crust accretion processes in the eastern Dharwar cra ton: Kunnam-Karimangaln area"Journal of Geological Society of India. (受理済み).

M.Jayananda、H.Kumar、T.Kano：“达尔瓦尔克拉通东部晚太古代幼体地壳增生过程：Kunnam-Karimangaln 地区”印度地质学会杂志（已接受）。

Spatial and frequency distributions of triclinisity of K-feldspar in augen gneisses and related granitic rocks in the Nepal Himalayas

尼泊尔喜马拉雅山奥根片麻岩及相关花岗岩中钾长石三斜度的空间和频率分布

• 发表时间: 2004
• 期刊: Himalayan Journal of Sciences 2
• 作者: Kano;T.
• 通讯作者: T.

K-feldspar structural state in Archaean granitoids and charnockitic rocks of the Dharwar craton and surrounding areas.

达尔瓦尔克拉通及周边地区太古宙花岗岩和镁辉岩中的钾长石结构状态。

• 发表时间: 2002
• 期刊: International Symposium on the Amalgamation of Precambrian blocks and the role of the Paleozoic Orogens in Asia(PPO-Asia in Sapporo
• 作者: Kano;T.
• 通讯作者: T.

Late Archaean juvenile magmatic accretion process in the eastern Dharwar craton : Kuppam-Karimangalam area.

达尔瓦尔克拉通东部晚太古宙幼年岩浆增生过程：Kuppam-Karimangalam 地区。

• 发表时间: 2003
• 期刊: Geological Society of India Memoir 50
• 作者: S.B.H.Kumar;M.Jayananda;T.Kano ほか2名
• 通讯作者: T.Kano ほか2名