Petrography of the volcaniclastic of Quartz Feldspar-Porphyry (QFP) from Kadiri Anantapur District, Andhra Pradesh, India

International Journal of Geoinformatics and Geological Science

© 2020 by SSRG - IJGGS Journal

Volume 7 Issue 3

Year of Publication : 2020

Authors : Maheswararao.R, Srinivasa Gowd.S, Rajeswari.S, Naveen Kumar.G, Krupavathi.C

10.14445/23939206/IJGGS-V7I3P102

How to Cite?

Maheswararao.R, Srinivasa Gowd.S, Rajeswari.S, Naveen Kumar.G, Krupavathi.C, "Petrography of the volcaniclastic of Quartz Feldspar-Porphyry (QFP) from Kadiri Anantapur District, Andhra Pradesh, India," SSRG International Journal of Geoinformatics and Geological Science, vol. 7,  no. 3, pp. 13-22, 2020. Crossref, https://doi.org/10.14445/23939206/IJGGS-V7I3P102

Abstract:

Quartz Feldspar Porphyry (QFP) occurs as volcaniclastics, located from Kadiri towards Hindupur that is due west has reflecting fining upward sequence, i.e., the size of the clast becomes smaller towards the west and finally ends up with the existence of rhyolite that is very occasionally porphyritic. Volcaniclast exhibits the impressions of the depressions caused by the fall of volcanic bombs. Kadiri Greenstone Belt indicates that there are intrusive granitoid. QFP has quartz and feldspars. The quartz appears to have two populations, viz., blue opalescent quartz and white quartz. The size of the blue quartz grades from 1mm to 12mm. Feldspars appears by the slight greenish tinge and also shows twinkling when the sample tilted against the sun. The Quartz feldspar Porphyry of Kadiri shows effect of tectonism and ductile deformation resembling Augen texture. Post-deposition structures are seen as micro faulting, where faulting has affected the individual minerals, and the matrix is seen filling the fracture grains

Keywords:

QFP, volcaniclastic, K-feldspar, ductile deformation, micro faulting

References:

[1] Anheuser, C. R., Mason, R., Viljoen, M. J. and Viljoen, R. P., (l969). “A reappraisal of some aspects of Precambrian shield geology”: Geological Society America Bulletin, v. 80, p. 2l75-2200.
[2] Bryant C.M., Arculus R. J.& Chappel L B W., (1997). “Clearance River Supersuite: 250Ma Cordilleran tonalitic I-type intrusions in eastern Australia.” Journal of Petrology 38, 975-1001. [3] Foote, R. B. (1888). “The Dharwar System, the chief auriferous rock series in South India”. Rec. Geol. Surv. Ind., 21.
[4] Hanumanthu, R.C., and Padmasree, P. (2003). “On the origin of metavolcanics and granitoids of Kadiri Schist Belt”, Anantapur District, Andhra Pradesh. Indian Mineralogist, v.36, No.2 & 37, No. 1, pp. 31-44.
[5] Hanumanthu, R.C., Vijayakumari, P., Suresh.G. And NBY Reddy et al.,(2008). “Geology and Geochemistry of Mafic Dyke Swarms of Peddavuru Schist Belt, Eastern Dharwar Craton”, South India. Gonf. Geol. Magz., v. 23(2), pp 145-150. [6] King, W. (1872). “On the Kadapah and Karnul formations in the Madras Presidency”. Mem. Geol. Surv. Ind.
[7] Maheswararao, R., Srinivasa Gowd, S., and Harish Vijay, G., (2019). “Petrography of the Quartz Feldspar Porphyry dyke from Patagundemgollapalle kadiri taluk Anatapuram district”, Andhrapradesh, India. The journal of Indian Geophysical Union (JIGU), VOL.28, 378-386.
[8] Padmasree, P. (2001). “Evolution of Kadiri Schist Belt, Eastern Dharwar craton’, South India.
[9] Rao, K.N. (1983). “Petrology and Geochemistry of Kadiri Schist Belt”, Anantapur District, A.P., Unpub. Prog.Rep., GIS.
[10] Sampat Iyengar, P.(1906). “Report on the survey work in the Chitradurga District”, Ibid., Rec. Mys. Geology, 9, 40-43.
[11] Srinivasulu, P. (2010). “Petrology, Geochemistry, and Petrogenesis of metavolcanics of Southern part of Kadiri Schist Belt,” Eastern Dharwar Craton, Andhra Pradesh, India. Unpublished Ph. D. thesis, S.V. University, Tirupati.
[12] U. Venkat Tilak, A. Narender Reddy, "Effect of Different Percentage Replacement of Weathered Aggregate in Place of Normal Aggregate on Young’s Modulus of Concrete to Produce High strength and Flexible/Ductile Concrete for use in Railway Concrete Sleepers" SSRG International Journal of Civil Engineering 2.11 (2015): 21-26.