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High heat production of granites from Southern Khetri Belt, Rajasthan, India


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1 Department of Geology, University of Jammu, Jammu 180 016, India
 

The Mesoproterozoic A-type granites from Chapoli–Chowkri area, South Khetri Belt (SKB) of Aravalli craton are characterized by high content of thorium and uranium with variable Th/U ratio. Average radiogenic heat production of Udaipurwati granite, Chapoli granite and albitite are 6.67 mWm–3, 6.90 mWm–3 and 6.92 mWm–3 respectively, which are much higher than the average RHP values for continental crust and the granites of North Khetri Belt (NKB). Average contribution of RHP due to thorium (56.86%) is higher than uranium (40.84%) and potassium (2.28%). Based on the heat production and their geochemical behaviour, these granites from South Khetri Belt are classified as moderate to high heat producing granites. Study on heat flow suggested that the high levels of radiogenic heat production in the uppermost crust could be the reason for high heat flow in the area

Keywords

Albitites, Chapoli–Chowkri area, Chapoli granite, RHP, Southern Khetri Belt, Udaipurwati granite
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  • High heat production of granites from Southern Khetri Belt, Rajasthan, India

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Authors

Rajni Magotra
Department of Geology, University of Jammu, Jammu 180 016, India
Pankaj K. Srivastava
Department of Geology, University of Jammu, Jammu 180 016, India

Abstract


The Mesoproterozoic A-type granites from Chapoli–Chowkri area, South Khetri Belt (SKB) of Aravalli craton are characterized by high content of thorium and uranium with variable Th/U ratio. Average radiogenic heat production of Udaipurwati granite, Chapoli granite and albitite are 6.67 mWm–3, 6.90 mWm–3 and 6.92 mWm–3 respectively, which are much higher than the average RHP values for continental crust and the granites of North Khetri Belt (NKB). Average contribution of RHP due to thorium (56.86%) is higher than uranium (40.84%) and potassium (2.28%). Based on the heat production and their geochemical behaviour, these granites from South Khetri Belt are classified as moderate to high heat producing granites. Study on heat flow suggested that the high levels of radiogenic heat production in the uppermost crust could be the reason for high heat flow in the area

Keywords


Albitites, Chapoli–Chowkri area, Chapoli granite, RHP, Southern Khetri Belt, Udaipurwati granite

References





DOI: https://doi.org/10.18520/cs%2Fv121%2Fi7%2F912-919