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

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Lamprophyre Dykes in Chotanagpur Gneissic Comlex, Near Simdega, Gumla District, Jharkhand


Affiliations
1 Geological Survey of India, Central Zone, AMSE Wing, Ranchi, India
2 Geological Survey of India, AMSE Wing, 40th Cross, Eshwar Nagar, Bangalore - 560 078, India
 

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Lamprophyre dykes are reported from the Precambrian metamorphites of the Chotanagpur Gneissic Complex near Simdega, Gumla district, Jharkhand. Petrological and petrochemical studies indicate that they are calc-Alkaline lamprophyres. The economic significance of these lamprophyres is discussed in light of their proximity to (i) the gold prospects in its strike continuity and (ii) reported occurrences of diamonds in the major drainage basins of the region.
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  • Lamprophyre Dykes in Chotanagpur Gneissic Comlex, Near Simdega, Gumla District, Jharkhand

Abstract Views: 219  |  PDF Views: 148

Authors

U. P. Singh
Geological Survey of India, Central Zone, AMSE Wing, Ranchi, India
N. S. Venkatesh
Geological Survey of India, AMSE Wing, 40th Cross, Eshwar Nagar, Bangalore - 560 078, India
K. S. Godhavari
Geological Survey of India, AMSE Wing, 40th Cross, Eshwar Nagar, Bangalore - 560 078, India
R. Gopalkrishnan
Geological Survey of India, AMSE Wing, 40th Cross, Eshwar Nagar, Bangalore - 560 078, India
Fareeduddin
Geological Survey of India, AMSE Wing, 40th Cross, Eshwar Nagar, Bangalore - 560 078, India
M. S. Rao
Geological Survey of India, AMSE Wing, 40th Cross, Eshwar Nagar, Bangalore - 560 078, India

Abstract


Lamprophyre dykes are reported from the Precambrian metamorphites of the Chotanagpur Gneissic Complex near Simdega, Gumla district, Jharkhand. Petrological and petrochemical studies indicate that they are calc-Alkaline lamprophyres. The economic significance of these lamprophyres is discussed in light of their proximity to (i) the gold prospects in its strike continuity and (ii) reported occurrences of diamonds in the major drainage basins of the region.