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Chemical and mineralogical composition of fluvial sediments (Bistrita River, Romania): Geogenic vs. anthropogenic input into rivers on its way through mining areas
Title Chemical and mineralogical composition of fluvial sediments (Bistrita River, Romania): Geogenic vs. anthropogenic input into rivers on its way through mining areas Author info Andreea Elena Maftei, Harald G. Dill ... [et al.] Author Maftei Andreea Elena (20%)
Co-authors Dill Harald G. (20%)
Buzatu Andrei (15%)
Iancu Ovidiu Gabriel (15%)
Buzgar Nicolae (15%)
Andráš Peter 1953- (15%) UMBFP04 - Katedra životného prostredia
Source document Geochemistry : Interdisciplinary Journal for Chemical Topics of the Geosciences. Vol. 78, no. 3 (2018), pp. 385-395. - Mníchov : Elsevier GmbH, 2018 Keywords sedimenty - sediments composition geochémia - geochemistry Form. Descr. články - journal articles Language English Country Netherlands systematics 502 Annotation The upper reaches of the Bistrita drainage system were selected as a natural test site to determine the geogenic and anthropogenic input into fluvio-lacustrine systems in humid mid-latitude morphoclimatic zones. The reason for this selection lies in the complex geology and its metallogenic evolution leading to a great variety of Fe, Mn, U, and polymetallic sulfides ore deposits. It sparked an intense mining activity during the past centuries with a strong impact on the drainage system similar to many mineralized sites in the world which are still under exploitation. Sediment samples from Bistrita River were analyzed by means of X-ray fluorescence spectrometry (XRF), X-ray diffraction (XRD), near-infrared (NIR) and micro-Raman spectroscopy (μ-Raman). Our results revealed that the chemical and mineralogical built-up of the stream sediments is mainly geogenic, with most of the trace elements accumulated in the river sediments derived from the source rocks exposed in catchment area of the River Bistrita. A strong input by man has been detected in the drainage system near abandoned mining sites. The trace elements are mainly accommodated in the structure of detrital minerals representative of the clastic aureole around the source rocks, and to a lesser extent adsorbed onto the surface of clay minerals. The REE incorporated into muscovite furnish evidence of having derived from the source rocks, prevalently mica schists exposed by supergene processes in the provenance area and rule out a neoformation of clay minerals on transport and deposition URL Link na plný text Public work category ADC No. of Archival Copy 44459 Repercussion category RAMOS-VAZQUEZ, Mayla A. - ARMSTRONG-ALTRIN, John S. Sediment chemistry and detrital zircon record in the Bosque and Paseo del Mar coastal areas from the southwestern Gulf of Mexico. In Marine and petroleum geology. ISSN 0264-8172, 2019, vol. 110, pp. 650-675.
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