Morphology and textures of komatiite flows of J.C. Pura schist belt, Dharwar craton


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Prabhakar, B.C. and Namratha, R. (2014) Morphology and textures of komatiite flows of J.C. Pura schist belt, Dharwar craton. Journal of the Geological Society of India, 83 (1). pp. 13-20. ISSN 0974-6889

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Study of komatiites for their structures and textures in cratonic blocks could provide more insights into the early Archaean volcanism, mantle processes and associated metallogeny. Jayachamarajapura (J.C.Pura) belt in Western Dharwar craton is a komatiitc milieu, where outcrop features display several flow characteristics and sub-volcanic emplacement features typical of well known komatiitic areas of the world. In spite of deformation, metamorphism and alterations the komatiites still preserve many of the primary cooling structures, which stand testimony for their extrusive volcanic nature. Distinct features like pillows, flow-top polyhedral joints, ocelli, vesicular, flow-top breccia and cumulate segregations and crude layering are observed. However, massive, undifferentiated nature of komatiitic flows is more predominant. Because of serpentinisation, carbonitization and chloritization, the original mineralogy and textures are obliterated and scantily preserved. Still, these observed features provide vital clues to imply the formation of komatiite sequences in a submarine to subaerial conditions when episodic pulses of komatiite lava piled up (about 3.35 Ga ago) to form the ultramafic milieu of J.C. Pura belt. © 2014 Geological Society of India.

Item Type: Article
Additional Information: cited By 0
Subjects: Faculty of Science > Earth Sciences > Geology
Divisions: Jnana Bharathi / Central College Campus > Department of Geology
Depositing User: Mr. Kirana Kumar D
Date Deposited: 26 Mar 2016 10:48
Last Modified: 26 Mar 2016 10:48

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