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

P. S. Ranawat ¹

Affiliations
1 Department of Geology Mohanlal Sukhadia University, Udaipur - 313 002, IN

Abstract

No Abstract.

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P. S. Ranawat ¹

Affiliations
1 Department of Geology, University of Rajasthan, Udaipur, IN

Abstract

Fluorite mineralisation is localised in post-Delhi intrusives of tonalite, hornblendite and vein quartz at Chowkri. Fluorite occurs in Ajabgarh feldspathic quartzites at Chhapoli and also aplites of younger age. The mineralisation is attributed to hydrothermal solutions genetically related to the post-Delhi intrusive granite, tonalite and aplites of the area.

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P. S. Ranawat ¹, R. S. Dashora ²

Affiliations
1 Department of Geology, University of Rajasthan, Udaipur 313 001, IN
2 Department of Mines & Geology, Government of Rajasthan, Udaipur 313 001, IN

Abstract

Fluorspar veins in Karara area occur in a variety of pyroclastic and flow rocks. represented by volcanic breccias, lapilli tuffs, and welded tuffs including ignimbrite. Lavas produced are of the nature of basalt. andesite, trachyte, dacite, and rhyolite along with their border line varieties.

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B. K. Mansinghka ¹, P. S. Ranawat ²

Affiliations
1 Pusa Niwas, Bhilwara, Rajasthan, IN
2 Department of Geology, M.L. Sukhadia University, Udaipur - 313 001, IN

Abstract

World's largest anthophyllite and tremolite deposits occur as small pods and lenses in the Precambrian ultramafic rocks of South Rajasthan. These deposits are being exploited by small-scale manual, open-cast mining methods. The recovered are is pulverised, without beneficiation, for use in asbestos-cement products that are manufactured in the small-scale industrial units throughout the country. Field survey conducted for mining, milling, and processing units did not yield anomalous health hazard results. The industry falls under the "extremely low-risk" catergory of the "Notion of acceptable risks". The paper attempts to rationally examine the facts and fallacies associated with asbestos mining and focuses attention on its risk-benefit aspect. It is concluded that the curbs imposed on asbestos are not justified.

Keywords

Asbestos, Mineral Economics, Health Hazards, Rajasthan.

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P. S. Ranawat ¹, 0. Rouer ², C. Ramboz ², N. Lakshmi ³

Affiliations
1 Department of Geology, M.L. Sukhadia University, Udaipur - 313 001, IN
2 ISTO-CNRS , IA rue de la Ferollerie, F-45071, Orleans Cedex 2, FR
3 Departrnent of Physics, M.L. Sukhadia University, Udaipur - 313 001, IN

Abstract

Placer concentrations of rolled chunks of heavy, Silvery-White, metallic mineral occur along a rivulet (N25°40.013'; E75°20.851') 15 km east of Jahazpur town of eastern Rajasthan. The float-ore occurs in the Precambrian phyllite that is profusely traversed by vein quartz, its physical, optical, XRD, EPMA data show that the mineral is native antimony (averaging 97.12%Sb) having -2% As; minor grains of PbTe are also recognized. Prospecting by the Department of Mines and Geology, Rajasthan has not yet resulted in the discovery of the mother lode. This report describes the mineralogy of the Float-Ore that has scientific value and is a new occurrence in India.

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