Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Carbonatite around Ajjipuram, Kollegal Taluk, Karnataka


Affiliations
1 No.53, 9th 'E' Cross, S.B.I. Colony, J.P. Nagar I Phase. Bangalore -560078, India
2 No. 693, Yelahanka, Bangalore- 560064, India
3 No. 60, II main road, B.S.K. III Stage, III Phase, Bangalore-560085., India
4 No.45/J, Marappa bLock,J. C. Nagar, Bangalore-560006, India
5 Flat 202, Sandhyagiri Apartments, Kalyan Nagar, Hyderabad-500068, India
6 7th Main, Padmanabhanagar, Bangalore- 560070, India
7 54F, Venkatapuram, Shankernagar, Salem -636007, India
 

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Several lensoid bodies of carbonatite occur within a wide zone of fenitisation in the granulite terrain of Kollegal taluk, Karnataka. These are emplaced along deep NNE-SSW fracture system and are associated with pyroxenite, talc-tremolite schist showing varying degree of fenitisation. The sovite and beforsite varieties show high percentage of SiO2 due to contamination during emplacement The Fe20 3 , MnO and MgO values of Ajjipuram carbonatites broadly compare with the Koratti carbonatites occurring on the eastern part ofthe mobile belt with similar tectonic history.

Keywords

Carbonatites, Kollegal Taluk, Karnataka.
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  • Carbonatite around Ajjipuram, Kollegal Taluk, Karnataka

Abstract Views: 271  |  PDF Views: 191

Authors

T. R. Anantharamu
No.53, 9th 'E' Cross, S.B.I. Colony, J.P. Nagar I Phase. Bangalore -560078, India
K. N. Nagarna Rao
No. 693, Yelahanka, Bangalore- 560064, India
Manjunatha
No. 60, II main road, B.S.K. III Stage, III Phase, Bangalore-560085., India
Shafeeq Ahmed
No.45/J, Marappa bLock,J. C. Nagar, Bangalore-560006, India
T. K. Gandhi Prasad
Flat 202, Sandhyagiri Apartments, Kalyan Nagar, Hyderabad-500068, India
T. Gopal Reddy
Flat 202, Sandhyagiri Apartments, Kalyan Nagar, Hyderabad-500068, India
S. P. Venkata Dasu
7th Main, Padmanabhanagar, Bangalore- 560070, India
E. B. Sugavanam
54F, Venkatapuram, Shankernagar, Salem -636007, India

Abstract


Several lensoid bodies of carbonatite occur within a wide zone of fenitisation in the granulite terrain of Kollegal taluk, Karnataka. These are emplaced along deep NNE-SSW fracture system and are associated with pyroxenite, talc-tremolite schist showing varying degree of fenitisation. The sovite and beforsite varieties show high percentage of SiO2 due to contamination during emplacement The Fe20 3 , MnO and MgO values of Ajjipuram carbonatites broadly compare with the Koratti carbonatites occurring on the eastern part ofthe mobile belt with similar tectonic history.

Keywords


Carbonatites, Kollegal Taluk, Karnataka.