Significant, but volumetrically smaller, unmetamorphosed and largely undeformed alkaline magmatic suites have been reported from the Southern Granulite Terrain in southern India. These Neoproterozoic alkaline magmatic rocks occur as lenses, dykes and plugs that are mostly within, or proximal to, major shear zones or transcrustal faults. In this contribution, field, petrographic and whole-rock geochemical data of Sullya syenites and associated mafic granulites from the Mercara Shear Zone (MSZ), which separates low-grade (greenschist to upper amphibolite facies) Dharwar Craton and high-grade (granulite facies) Southern Granulite Terrain is presented. The isolated body of the Sullya syenite, similar to other alkaline plutons of the Southern Granulite Terrain, shows an intrusive relationship with the host hornblende-biotite gneisses and mafic granulites. The Sullya syenites lack macroscopic foliations and unlike, other plutons, they are not associated with carbonatites and ultrapotassic granites. Potash feldspar and plagioclase dominates the felsic phases in the Sullya syenite and there is negligible quartz. The studied syenites show evidence of melt supported deformation, but show no evidence of recrystallization. Geochemically, they most resemble the Angadimogar syenites (situated 3 km west of the Sullya syenites) with similar major oxide and trace element concentrations. The petrogenetic studies of the Sullya syenite have indicated that they were generated by mixing of two different sources derived from the partial melting of metasomatized continental mantle lithosphere and lower crustal mafic granulites. This melt source could have been emplaced in a rift-related tectonic setting. The emplacement is considered to be controlled by shears.

印度南部的南部花岗岩地区据报道有大量的但体积较小，未变质和基本未变形的碱性岩浆组。这些新元古代碱性岩浆岩以透镜，堤坝和岩塞的形式出现，它们大多位于主要剪切带或跨壳断层之内或附近。在此贡献中，来自Mercara剪切带（MSZ）的Sullya榴辉岩和相关的镁铁质粒岩的野外，岩石学和全岩石地球化学数据，将低品位（绿岩岩相至上层角砾岩相）Dharwar Craton和高品位（粒相）相分离。 ）介绍了南部花岗岩。苏拉亚榴辉岩的孤立体，与南部花岗岩颗粒地形的其他碱性云母相似，显示出与宿主角闪石-黑云母片麻岩和镁铁质粒岩的侵入性关系。Sullya正长岩缺乏宏观叶状结构，与其他普尔腾岩不同，它们与碳酸盐岩和超钾质花岗岩无关。钾长石和斜长石在苏利雅正长岩的长英相中占主导地位，而石英可忽略不计。所研究的正长岩显示出熔体支撑变形的迹象，但未显示出再结晶的迹象。在地球化学上，它们最类似于Angadimogar榴辉岩（位于Sullya榴辉岩以西3公里处），具有相似的主要氧化物和微量元素浓度。苏利雅正长岩的岩石成因研究表明，它们是由交代化大陆幔岩石圈和下地壳镁铁质粒岩的部分熔融产生的两种不同来源混合而成的。该熔源可能已被放置在与裂谷有关的构造环境中。该位置被认为是由剪力控制的。