DBPapers
DOI: 10.5593/SGEM2014/B13/S4.116

MINERALIZATION OF THE GNEISS BODIES IN ORASTIE MOUNTAINS (ROMANIA)

N. Ludusan, L. Dimen, L. T.Bardan
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-09-4 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 3, 911-916 pp

ABSTRACT
In the north part of Orăştie Mountains (Southern Carpathians), a series of four microcline-bearing gneiss bodies were identified high levels of radioactivity, that are associated mineralizations of rare metals, located in one of the above mentioned gneiss bodies. The host body has a tabular aspect, conformable with the surrounding forrnations. The mineralization with rare metals consists of salts of Zr, Nb, Th, U, Rb, Sn, Ba and REE (Y, Ce, La). Several rare metals and REE minerals were identified: zircon, monazite, xenotime, orthite, lessingite, torneboehmite, pyrochlore, fergusonite, thorite, cassiterite etc. Distribution maps of these elements, at deposit level, point out an uneven distribution and a tendency of concentrating in nests located at the intersection of local faults. The is assumed to be pneumatholitic, with supercritical fluids of potassic nature, circulating along a crustal regional fault located in the north part of Orăştie Mountains.

Keywords: gneiss bodies, mineralizations, rare metals, distribution of elements, origin of mineralization..

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