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Carpathian Journal of Earth and Environmental Sciences

An International Peer-Reviewed Open Access Journal

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ARTICLE IN » Volume 7, 2012 - Number 3

GEOCHEMICAL CHARACTERISTICS OF RARE EARTH ELEMENTS AND SELECTED TRACE ELEMENTS FROM THE MĂNĂILA ORE DEPOSIT (EASTERN CARPATHIANS)



Simona MOLDOVEANU1
1“Alexandru Ioan Cuza” University of Iasi, Faculty of Geography and Geology, Department of Geology, 20A Carol I Blvd., 700505, Iasi, Romania, e-mail: iftode_simona@yahoo.com

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Abstract

The Mănăila ore deposit lies in the Tulgheş Group a Cambrian-Ordovician island arc complex metamorphosed under greenschist facies conditions. Mănăila ore deposits together with other deposits located in the Tg3 formation of the Tulgheş Group is considered by severals authors to be of Kuroko type. The main purpose of the paper is to present the geochemical interpretation for REE, and selected trace from the Mănăila ore, Romania. The study was conducted on a series of ten samples collected from the Mănăila ore deposit separated in rock samples and mineralized samples. The data obtained from the analyses of REE was normalized to the chondritic value and plotted in spider diagrams. For the rock samples the range of REE contents is : 5.1 - 58.6 μg·g-1 for La, 9.8 – 110 μg·g-1 for Ce, 1.1 – 12.2 μg·g-1for Pr, 4.8 – 40.9 μg·g-1 for Nd, 1.1 – 7.3 μg·g-1 for Sm, 0.21 – 1.54 μg·g-1 for Eu, 1.71 – 7.3 for Gd, 0.28 – 1.05 μg·g-1 for Tb, 1.5 – 6 μg·g-1 for Dy, 0.33 -1.3 μg·g-1 for Ho, 0.99 - 4.2 μg·g-1 for Er, 0.15 – 0.63 μg·g-1 for Tm, 1 – 4.1 μg·g-1 for Yb, 0.14 -0.58 μg·g-1 for Lu. The range of REE contents for mineralized samples is:3.9 – 4.2 μg·g-1 for La, 8.3 – 9.8 μg·g-1 for Ce, 0.93 – 1.1 μg·g-1 for Pr, 3.2 – 4.5 μg·g-1 for Nd, 0.74 – 1.2 μg·g-1 for Sm, 0.15 – 0.2 μg·g-1 for Eu, 1.2 -1.3 μg·g-1 for Gd, 0.25 – 0.27 μg·g-1 for Tb, 1.4-1.7 μg·g-1 for Dy, 0.34-0.42 μg·g-1 for Ho, 0.94-1.1 μg·g-1 for Er, 0.16-0.16 μg·g-1 for Tm, 0.95-1.1 μg·g-1 for Yb, 0.14-0.18 μg·g-1 for Lu,. An Eu anomaly is visible for the both group of samples, which in case of the mineralized samples is slightly more pronounced.
Keywords:
  • ICP-MS
  • Mănăila
  • ore
  • deposit
  • trace
  • and
  • rare
  • earth
  • elements
  • Tulgheş
  • Group
  • Kuroko

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© 2012 by the author(s). Licensee CJEES, Carpathian Association of Environment and Earth Sciences. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

How to cite

Simona MOLDOVEANU (2012). GEOCHEMICAL CHARACTERISTICS OF RARE EARTH ELEMENTS AND SELECTED TRACE ELEMENTS FROM THE MĂNĂILA ORE DEPOSIT (EASTERN CARPATHIANS)

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