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A new find of lamproite dyke near Chintalapalle area, NW margin of the Cuddapah basin, eastern Dharwar craton, southern India

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Journal of the Geological Society of India

Abstract

A singular outcrop of a lamproite dyke is located ~1.5 km south-west of Chintalapalle village at the NW margin of the Cuddapah basin, eastern Dharwar craton, southern India.. The dyke trends E-W and is emplaced within the granitic rocks belonging to the peninsular gneissic complex. The lamproite dyke has a porphyritic to weakly porphyritic texture comprising microphenocrysts of sanidine, and potassic richterite set in a groundmass rich in carbonate, and chlorite with rutile and titanate as accessory phases. This new occurrence of lamproite is located mid-way between the well-known Narayanpet kimberlite field towards the west and the Ramadugu and Vattikod lamproite fields in east. The Chintalapalle lamproite dyke, together with those from Vattikod, Ramadugu, Krishna and Cuddapah basin lamproite fields, constitute a wide spectrum of ultrapotassic magmatism emplaced in and around the Palaeo-Mesoproterozoic Cuddapah basin in southern India.

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Authors and Affiliations

  1. Project: Diamond, State Unit: Andhra Pradesh and Telangana, Geological Survey of India, Southern Region, Hyderabad, 500 068, India

    Alok Kumar, Praveer Pankaj & K. Koteswara Rao

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  1. Alok Kumar
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  2. Praveer Pankaj
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  3. K. Koteswara Rao
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Correspondence to Alok Kumar.

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Kumar, A., Pankaj, P. & Rao, K.K. A new find of lamproite dyke near Chintalapalle area, NW margin of the Cuddapah basin, eastern Dharwar craton, southern India. J Geol Soc India 87, 127–131 (2016). https://doi.org/10.1007/s12594-016-0380-2

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  • DOI: https://doi.org/10.1007/s12594-016-0380-2

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