TITLE:
Petrography of Bethampudi Anorthosites Layered Complex from the Khammam Schist Belt, Telangana, India
AUTHORS:
Thallapalli Brahmaiah, Chinthala Ravi, Kandukuri Sai Krishna, Gugulothu Papanna, Katta Satya Sai Prasad
KEYWORDS:
Bethampudi Layered Anorthosite Complex, Petrographic Classification, Calc Alkaline Nature, Fractional Crystallization of Gabbroic Rocks
JOURNAL NAME:
Open Journal of Geology,
Vol.6 No.11,
November
24,
2016
ABSTRACT: The Bethampudi layered anorthosite complex at the border zone of Archaean supracrustal rocks of Khammam district, Eastern Ghats shows normal stratification predominantly in the form of rhythmic layering and often exhibits of zebra layering. Graded bedding and cumulate structures are also noticed. The rocks of the study area are classified based on petrography into anorthositic rocks, gabbroic rocks and ultramafic rocks and amphibolites. The field relations and major element composition suggest that these anorthosite rocks are of calc-alkaline in nature and petrogenitically related to the gabbroic rocks by the fractional crystallization at ℃.