Petrological and Geochemical Studies of Anorthositic Rocks and their Tectonic Setting in the Khammam Schist Belt, Telangana
Author(s):
Mallesh Ganji, Ch. Ramakrishna, M. Narsimha Reddy
Keywords:
Khammam Schist Belt, calc-alkaline, tholeiitic, island arc setting
Abstract
The Khammam Schist Belt (KSB) falls in Khammam and Bhadradri Kothagudem Districts of Telangana State bounded by the latitudes by the latitudes 17o15’ and 17o35’ N, and longitudes 80o20’ and 80o35’ E and covers an area of about 300 sq. km. The Khammam Schist Belt (KSB), unlike other schist belts of the Eastern Dharwar Craton (Gadwal and Peddavura etc.) there is no linear belt like configuration and does not contain entire litho package of schist belt. Chimalpad Layered Anorthositic Complex (CLAC) was syntectonically emplaced as “sill-like” intrusive body within the KSB along NE-SW direction. The main lithounits of the study area is mainly divided into (1) Anorthositic rocks, (2) Amphibolites. The geochemical data suggests that the Anorthosites and Amphibolites of the KSB are of the calc-alkaline and tholeiitic affinity respectively. The tectonic discrimination diagrams of the anorthosites and amphibolites infers that the rocks are formed by calc-alkaline and tholeiitic magmas respectively. The Khammam Schist Belt and Chimalpad Layered Anorthositic Complex is a Late Archean to Proterozoic subduction zone segment of the oceanic island arc setting.
Article Details
Unique Paper ID: 154493

Publication Volume & Issue: Volume 8, Issue 11

Page(s): 290 - 300
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