Field Relationships and Petrographic Characterization of Darsi Granite from Nellore Schist Belt, Eastern Dharwar Craton, Andra Pradesh, South India

  • Unique Paper ID: 173041
  • Volume: 11
  • Issue: 9
  • PageNo: 1957-1961
  • Abstract:
  • In this work, we describe the in-situ field and petrographic observations of the Darsi granite pluton, which is located in the Nellore schist belt of the Eastern Dharwar Craton in South India. The Darsi granite pluton, which is located to the north of Darsi town, is a leucocratic granite pluton that is trending in a north-northeast-southwest direction and covering an area of 6 square kilometers. Field investigations have shown that the Darsi granite is deformed along the edges and lineation. In certain locations, mafic clots have been detected, which is evidence of the intrusive character of the granite. Although observed from a petrographic perspective, the rock is mostly K-feldspar, with quartz, amphibole, plagioclase, and biotite serving as subordinate components, indicating hypersolvus nature. Apatite, zircon, titanite, fluorite, and opaques are the phases that are considered to be accessory. The CIPW normative data of the Darsi granite exhibits alkali feldspar to syeno granite composition, which is comparable with petrographical features. The alkali content makes it abundantly evident that the Darsi granite is of the A-type.

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