Analele ştiinţifice ale Universităţii "Al. I. Cuza" din Iaşi

T. Murariu - „Al.I.Cuza” University of Iasi, Department of Geology
M. Răileanu - „Al.I.Cuza” University of Iaşi, Department of Geology
Cristina Aneculaesei - „Al.I.Cuza” University of Iasi, Department of Geology

This paper presents the quantitative distribution of Cu (total and mobile) in the stream sediments of Lesu and Ursu Brooks in the Bistriţei Mountains-Eastern Carpathians.

The geological background reveals the presence of low-grade metamorphic rocks belonging to the Tulghes Group to which the singenetic polymetallic sulphide mineralization (the Lesu Ursului ore deposit) is associated; this mineralization is considered of volcano-sedimentary origin, metamorphosed during an early Caledonian event.

The concentration of Cu was determined using the atomic absorption spectrometry.

The contents of Cu total from the investigated stream sediments display contents placed in a large range: 17.8 - 87μg/g .

In the stream sediments are presented positive correlations between the contents of Cu total and Cu mobile.

The coefficient of concentration (k) shows that the sediments from the investigated area accumulate higher amounts of Cu than the soils and the vegetation of some other regions.