引言自从 Holland(1893、1900)第一次提出“紫苏花岗岩”和“紫苏花岗岩系列”以来,印度南部高级(紫苏花岗岩)和低级(“半岛片麻岩”)地体之间的关系一直是人们研究和辩论的课题。这里所讲的紫苏花岗岩是指石英-长石质、酸性至中性的含紫苏辉石的岩石。在印度南部,这种高级地体与低级地体之间的过渡带,是一个从西海岸的曼加洛尔延伸到东海岸的马德拉斯北面的、长600km 的不规则带(图1)。位于过渡带北面的闪岩相“半岛片麻岩”,以片麻岩和混合岩为特征,在成分上 INTRODUCTION The relationship between the higher (perishite) and lower (“peninsula gneiss”) terranes in southern India since the first series of “Perilla and Granite” by Holland (1893,1900) It has always been a subject of research and debate. The perillae granites referred to here are quartz-feldspathic, acidic to neutral peridotite-bearing rocks. In southern India, the transition zone between this high-grade landmass and the low-lying landform is an irregular belt 600 km long north of Madras, extending from Mangalore on the west coast to the east coast (Figure 1) . The amphibolite facies “peninsula gneiss,” to the north of the transitional zone, characterized by gneisses and migmatites, is structurally