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1:1百万LANDSAT影象和踏勘构造分析的解释,加上印度地质调查所公布的资料,才能提出一个南印度地盾太古宙到元古宙地质年代学模式。在图1和图2中示出了这个解释的结果。该图清楚地指出了下列总的特征: O期:太古宙地壳双型花岗岩和上地壳岩层的形成,包括约3100Ma花岗片麻岩原岩和约2700Ma镁铁质到硅质火山岩的侵位。由于标志区在复杂1期剪切带内,所以有
A 1: 1 million LANDSAT imaging and interpretation of the tectonic interpretation, together with the information published by the Indian Geological Survey, suggests a geochronological model of the Archean to Paleozoic of the South Indian Shield. The result of this explanation is shown in FIGS. 1 and 2. The figure clearly indicates the following general characteristics: Stage O: Formation of the Archean crustal double-type granite and upper crust strata, including about 3100 Ma of granitic gneiss and about 2700 Ma of mafic to siliceous volcanic rocks. There is a sign area in the complex 1-period shear band