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Occurrence and emplacement of chromite ores in Sindhudurg district, Maharashtra, India

DRS at CSIR-National Institute of Oceanography

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Title Occurrence and emplacement of chromite ores in Sindhudurg district, Maharashtra, India
 
Creator Iyer, S.D.
Babu, E.V.S.S.K.
Mislankar, P.G.
Gujar, A.R.
Ambre, N.V.
Loveson, V.J.
 
Subject chromite ores
placer
metamorphic rocks
podiform
 
Description In the present study, the occurrence and emplacement of chromite ore deposits from two abandoned mines (Kankavali (Janoli) and Wagda) in the Sindhudurg district of Maharashtra, India are presented. These ores, that occurred as lenses and are associated with metamorphic and ultrabasic rocks, consist of octahedral grains of chromite, while clinochlore is present between the interstices of these grains. The Kankavali (janoli) and Wagda ores revealed a dominance of Cr sub(2) O sub(3) followed by FeO and variable proportions of Al sub(2) O sub(3), MgO, and SiO sub(2). The former deposits have a slightly higher Cr sub(2) O sub(3) (average 52 wt %) and FeO (approx. 18 wt %) than those from Wagda (Cr sub(2) O sub(3) approx. 50 wt %, FeO approx. 25 wt %). The similar Cr values (0.73) for Kankavali (Janoli), 0.74 for Wagda) correspond to those reported for typical podiform-type chromite deposits. It is suggested that the ores were emplaced as phacoliths in folded outcrops with a steep easterly dip and northwest-southeast trend. It is postulated that the continuation of the fold structure from Janoli to Wagda (approx. 4.5 km apart) and the probable (sporadic) occurrence of chromite along this stretch. The possibility of the contribution of chromite grains from these areas to the coastal placer deposits cannot be ruled out.
 
Date 2010-07-16T12:06:57Z
2010-07-16T12:06:57Z
2010
 
Type Journal Article
 
Identifier Acta geologica Sinica, vol.84(3); 515-527
http://drs.nio.org/drs/handle/2264/3659
 
Language en
 
Rights Copyright [2010]. All efforts have been made to respect the copyright to the best of our
knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher The Geological Society of China