Temat: sea-floor sediment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Charakterystyka morfologiczno-mineralogiczna konkrecji polimetalicznych ze strefy Clarion-Clipperton na Oceanie Spokojnym – wyniki wstępne
Morphological and mineralogical characteristics of polymetallic nodules from the Clarion-Clipperton zone on the Pacific Ocean -preliminary results.
Autorzy:: Kozłowska-Roman, Agata
Mikulski, Stanisław Z.
Powiązania:: https://bibliotekanauki.pl/articles/2075981.pdf
Data publikacji:: 2019
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: konkrecje polimetaliczne
EMPA
skład chemiczny
osad morski
strefa Clarion-Clipperton
Pacyfik
polymetallic nodules
chemical composition
sea-floor sediment
Clarion-Clipperton Zone
Pacific Ocean
Opis:: Manganese nodules, known also as polymetallic nodules, from the Clarion-Clipperton Zone on the Pacific Ocean were examined by the electron microprobe method to determine their chemical and mineralogical compositions. Two different types of layers were distinguished and total metal content was determined. Macroscopic investigations were also described.
Źródło:: Przegląd Geologiczny; 2019, 67; 169--172
0033-2151
Pojawia się w:: Przegląd Geologiczny
Dostawca treści:: Biblioteka Nauki

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Tytuł:: The contribution of the fine sediment fraction to the Fluffy Layer Suspended Matter (FLSM)
Autorzy:: Pempkowiak, J.
Beldowski, J.
Pazdro, K.
Staniszewski, A.
Leipe, T.
Emeis, K.C.
Powiązania:: https://bibliotekanauki.pl/articles/48591.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: sediment fraction
Pomeranian Bay
Fluffy Layer Suspended Matter
polonium
Baltic Sea
radioisotope
sea floor
lead
Opis:: Fluffy Layer Suspended Matter (FLSM) is a layer of fairly concentrated suspended matter resting on the sea floor. Its passage to the depositional basins in the Pomeranian Bay – Arkona Deep System of the Baltic Sea is estimated to take around six months. In the course of this migration, the properties of FLSM change as a result of ageing and the influx of fresh particles from the water column, and possibly also because of mass exchange with the uppermost sediment layers. Measurements of radioisotopes (210Po, 210Pb, 137Cs) have demonstrated that in shallow water this topmost layer of sediments, from 8 cm to 3 cm in thickness, is subject to mixing. This creates redox profiles favourable to biota and bioturbation. Basing on 210Pb/210Po disequilibria and the 210Po excess, it was estimated that under steady state conditions from 1.5 to 2.2% of fine fraction (FSF) in the mixed layer of sediments is freshly imported from FLSM. This implies replacement of FSF from the sediments and its incorporation into FLSM. On the assumption that the surface density of FLSM is 10 mg cm−2, FSF freshly exported from sediments actually comprises up to 15% of FLSM. Therefore, the properties of FLSM are strongly influenced by the processes taking place in the sediments, although FLSM by definition is independent of sediments.
Źródło:: Oceanologia; 2002, 44, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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