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Petrographic Study of Basalt from Adi hill, Nipani, Belgaum District, Karnataka, India

Yogita Abhijit Patil, Abhijit J. Patil, Shobha Teli

Abstract


Adi is a rural region in India's Karnataka state's Belgaum district. The Co-ordinates are 16.4962° N and 74.3727° E. The area is underlain by basaltic lava flows, known as Deccan Trap. Plagioclase and pyroxene make up the majority of the fine-grained volcanic rock known as basalt, which also contains biotite, olivine, and quartz. Basalt is composed of calcic plagioclase and pyroxene. Plagioclase is seen in the form of laths. Common pyroxene found in basalts is augite. Along with this modal analysis of these rock samples has been carried out. From this it is evident that plagioclase is most abundant mineral followed by augite. Iron oxide and glassy material is also present in considerable amount followed by biotite. Olivine has been found exceptionally. Basalt samples from different flows show different textures, like porphyritic, intergranular and sub ophitic. Laterite covers the uppermost basaltic flow. The flows are equivalent to Panhala Formations of Wai Subgroup.


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References


L. Geohring, Stephen W. Morris. “Scaling of columnar joints in basalt”. Journal of Geophysical Research. October 2008; 113 (B10).

W. H. Skyes. 1833- Deccan Trap Volcanicity, Trans. Geol. Soc, London, 2, 409-472.

Abhijit J. Patil. “Geological and Geomorphological Study of Kumbhi River Basin, Kolhapur District, Maharashtra, India”. PhD thesis. Swami Ramanand Teerth Marathwada University. 2019.

Belgaum district gazetteer. Chapter General. State Government of Karnataka, Karnataka. 1987.

K. G. Cox, C. J. Hawkesworth, 5. K. G. Cox, C. J. Hawkesworth. “Relative contribution of crust and mantle to Flood Basalt Volcanism, Mahabaleshwar area, Deccan Traps”. Philosophical Transactions of the Royal Society. 1984; A310(1514): 627-641.

C. Mitchell, M. Widdowson. “A geological map of the southern Deccan Traps, India and its structural implications”. Journal of the Geological Society. May 1991; 148: 495-505.

Anne Jay, Mike Widdowson. (1996). “Stratigraphy, structure and volcanology of the SE Deccan continental flood basalt province: Implications for eruptive extent and volumes”. Journal of the Geological Society. 2008; 165(1): 177-188.

Lightfoot et, al. “Source and Differentiation of Deccan Trap Lavas: Implications of Geochemical and Mineral Chemical Variations”. Journal of Petrology. October 1990; 31(5): 1165-1200.

A. V. Jayaprakash. “Flow Stratigraphy of Deccan Trap in Karnataka”. Journal of Geological Society of India. August 2007; 70(2).

P. R. Hooper, K. V. Subbarao, J. F. Beane. “The Giant plagioclase Basalts (GPB’s) of the Western Ghat, Deccan Traps Deccan flood Basalts, Mem 10.” Geological society of India. 1988; 135-144.

GSI (December 2012). “Geological Survey of India – Southern region. Briefing Book.” [Online]. Available from https://www.gsi.gov.in/webcenter/ShowProperty;jsessionid=0Z55efYJ_

BESqyoTUVmGW1xLxCw-v2tcVblEs3RAfnoIcg8zvPf2!-107032927!-68022989?nodeId=%2FUCM%2FDCPORT1GSIGOVI063287%2F%2FidcPrimaryFile&revision=latestreleased

J. E. Beane, C. A. Turner, P. R. Hooper,et, al. (1986) “Stratigraphy, composition, and form of the Deccan basalts, Western Ghats, India”. Bulletin of Volcanology. 1986. 48:61–83

A. Winchell, H. Winchell. “Elements of Optical Mineralogy” fourth edition Wiley Eastern Private Ltd. New Delhi. 1968

Yogita A. Patil, Abhijit J. Patil, H. S. Patode, S. N. Savant. “Study of columnar joints from Jyotiba and Tumjai area of Kolhapur district”. International Journal of Researches in Biosciences, Agriculture and technology. November 2017; V (3): 1-3.


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