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| Titel |
Laminae type and possible mechanisms for the formation of laminated sediments in the Shaban Deep, northern Red Sea |
| VerfasserIn |
I. A. Seeberg-Elverfeldt, C. B. Lange, J. Pätzold, G. Kühn |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 1, no. 2 ; Nr. 1, no. 2 (2005-10-25), S.113-126 |
| Datensatznummer |
250000158
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| Publikation (Nr.) |
 copernicus.org/os-1-113-2005.pdf |
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| Zusammenfassung |
| Laminated sediments in the Shaban Deep, a brine-filled basin in the northern
Red Sea, were analyzed with backscattered electron imagery. Here we present
possible mechanisms involved in the formation of laminae of various types
and homogenous intervals arising from the detailed investigation of
multicore GeoB 7805-1 (26°13.9' N and 35°22.6' E; water depth 1447 m)
and gravity core GeoB 5836-2 (26°12.61' N, 35°21.56' E; water depth
1475 m). Sediment makeup includes six types: a) a laminated structure with
alternating light (mainly coccoliths) and dark (diatom frustules) layers,
where the diatom component is indicative of the intra-annual variability
between stratification and mixing events; b) a pocket-like structure
attributed to the sinking of particles within fecal pellets and aggregates;
c) a matrix of tightly packed diatoms that relates to extended
stratification/mixing periods of the water column; d) homogenous intervals
that result from turbidity deposition; e) silt accumulations which origin
may lie in agglutinated foraminifers; and f) pyrite layers with pyrite
formation initiated at the seawater-brine interface. |
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