Organic compounds at DSDP Hole 90-593


Autoria(s): Mycke, Bernd; Emeis, Kay-Christian; Degens, Egon T
Cobertura

LATITUDE: -40.507800 * LONGITUDE: 167.674500 * DATE/TIME START: 1982-12-28T00:00:00 * DATE/TIME END: 1982-12-28T00:00:00

Data(s)

23/10/1986

Resumo

Corg and Norg contents in the acid insoluble mineral fraction were studied in sediments of Site 593. Both decrease systematically from Recent to early Miocene over 425 m of carbonate facies. C/N ratios (7-11) are typically marine and indicate that residual organic matter, bound to clay minerals, was originally scavenged from the marine habitat rather than being of terrigenous origin. Variations of Corg and Norg are almost entirely controlled by rates of sedimentation, which gradually increase from Recent to early Miocene. Preliminary results of carbohydrate distribution indicate that epigenetic and diagenetic processes alter both the concentrations and the ratios of individual monomers with depth. Total carbohydrate concentrations in the samples diminish from 91 µg/g sediment at 18 m sub-bottom depth to 49 µg/g at 335 m. In contrast, sugars in the acid insoluble residue increase with depth, suggesting release of structural polysaccharides and their subsequent association with clay minerals. Ratios of arabinose to fucose, which are about 6:1 in Recent carbonaceous sediments intercepted by sediment traps, vary from 1:1 in the youngest sample to 1:2.5 in the oldest.

Formato

application/zip, 3 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.793032

doi:10.1594/PANGAEA.793032

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Mycke, Bernd; Emeis, Kay-Christian; Degens, Egon T (1986): Diagenesis of organic compounds in Hole 593, Leg 90 (Tasman Sea). In: Kennett, JP; von der Borch, CC; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 90, 1265-1269, doi:10.2973/dsdp.proc.90.135.1986

Palavras-Chave #90-593; Ara; Arabinose; C; C/N; CaCO3; Calcium carbonate; Carbohydrates, total; Carbon; Carbon, organic, fraction; Carbon, organic, total; Carbon/Nitrogen ratio; CHO tot; Deep Sea Drilling Project; Depth; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Element analyser CHN, Carlo Erba; Fru; Fructose; Fuc; Fucose; Gal; Galactose; Glomar Challenger; Glu; Glucose; In acid insoluble residue; Ion-exchange-chromatography; Leg90; Man; Mannose; mbsf; Min; Nitrogen, organic; N org; OC frac; Percentage of acid insoluble Corg computed for bulk sample; Rha; Rhamnose; South Pacific/Tasman Sea/PLATEAU; TOC; Total sugars; Xyl; Xylose
Tipo

Dataset