The Diagenetic Factors Controlling the Dissolved Organic Carbon (DOC) in Pore Water from Deep Sea Sediments (ODP Leg 113|Weddell Sea)

Abdullah, M. I.

doi:10.2973/odp.proc.sr.113.167.1990

Cited by 11 publications

(7 citation statements)

References 29 publications

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“…One possible explanation for the higher DFAA at Sites 689 and 690 is reduced microbiological activity because small decrease in sulfate in interstitial waters results from low organic carbon content. It is consistent with low DOC concentrations at Sites 689 and 690 (Egeberg and Abdullah, 1990). Smear slide observations indicated that the major constituents of the sediments from Sites 689 and 690 were biogenic material.…”

Section: General Characteristics Of Dcaa In Interstitial Waterssupporting

confidence: 64%

“…Carbonate content was very low (0-3.9 wt.%) in Unit 1, variable in Unit 2A (0.8-91.3 wt.%) and high in Units 2B and 3 (75.5-98.1 wt.%). Organic carbon content was low throughout the hole with the mean value 0.11 wt.% (Egeberg and Abdullah, 1990).…”

Section: Summary Of the Geological Frameworkmentioning

confidence: 99%

“…On the other hand, DOC concentrations at Sites 689 and 690 were one to two orders of magnitude lower than those at above sites (1.82-6.91 mgC L -1 ). Egeberg and Abdullah (1990) ascribed the low DOC concentration to significantly lower concentrations of sedimentary organic material deposited under low sedimentation rate. Mean organic carbon contents at Sites 689 and 690 were 0.11 and 0.15, respectively, which was comparable to those observed in oligotrophic ocean in the western Pacific (Kawahata, 1999).…”

Section: Relationship Between Doc and Total Dissolved Amino Acids In mentioning

confidence: 99%

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Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean.

Kawahata

Ishizuka

2000

Geochem. J.

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Biogenic calcareous and siliceous sediments were drilled at ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean. We analyzed dissolved combined amino acids (DCAA) and dissolved free amino acids (DFAA) in interstitial waters in order to characterize the amino acids in dissolved organic matter. The DFAA was predominant over the DCAA in interstitial waters at Sites 689 and 690, which contradicted the previous results from interstitial water and seawater studies. The DCAA in the interstitial waters probably originated from calcareous biogenic debris with less amounts of siliceous debris. Although glutamic acid constituted 41% of the total concentration of DCAA, it accounted for only 1% of the total concentration of DFAA due to the adsorption and/or reaction with biogenic carbonate. Ornithine, a nonprotein amino acid, is a decomposed product of arginine and made up 17 mol% of the total DFAA and. The total hydrolyzable amino acids (=DCAA + DFAA) accounted for 5 to 28% of the dissolved organic carbon (DOC) concentration, which implied that high molecular weight organic matter was a major contributor for the DOM (dissolved organic matter) in interstitial waters. Fairly positive correlation between the dissolved manganese and the total DCAA values suggested that the redox condition plays a significant role in controlling the total DCAA content. A small decrease in the sulfate concentration in the interstitial waters from both sites suggested fairly low microbial activity by sulfate-reducing bacteria.

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Section: General Characteristics Of Dcaa In Interstitial Waterssupporting

confidence: 64%

Section: Summary Of the Geological Frameworkmentioning

confidence: 99%

Section: Relationship Between Doc and Total Dissolved Amino Acids In mentioning

confidence: 99%

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Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean.

Kawahata

Ishizuka

2000

Geochem. J.

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“…Sulfate profiles in deep-sea sediments are usually concave downward, although linear profiles like those observed at Site 991 are not uncommon (e.g., Egeberg and Abdullah, 1990;Borowski et al, in press). Linear SO 4 2~ profiles can be attributed to extensive SO 4 2~ depletion in a restricted subsurface interval accompanied by downward SO 4 2 " diffusion.…”

Section: Factors Controlling Sulfate Depletionmentioning

confidence: 99%

Sites 991/992/993

Paull¹,

Matusmoto²,

Wallace³

1996

Proceedings of the Ocean Drilling Program

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“…In contrast to the numerous DOC profiles published from surficial (<1 m) marine sediments (e.g., Krom and Sholkovitz, 1977;Burdige et al, 1992Burdige et al, , 1999Alperin et al, 1994Alperin et al, , 1999Burdige and Homstead, 1994;Burdige and Zheng, 1998;Burdige, 2002Burdige, , 2006, only a few studies have examined pore water DOC concentrations within profiles extending to greater sediment depths (Michaelis et al, 1982;Egeberg and Abdullah, 1990;Seifert et al, 1990;Wefer et al, 1998;Simoneit and Sparrow, 2002;Heuer et al, 2009). Although the DOC concentrations within surficial sediments generally increase exponentially with increasing depth from the seawater/sediment interface until reaching an asymptotic maximum, DOC concentrations within deep sediment pore water generally do not demonstrate such systematic variation with depth.…”

Section: Introductionmentioning

confidence: 99%

Data report: dissolved and particulate organic carbon in the deep sediments of IODP Site U1363 near Grizzly Bare seamount

Lin¹,

C.-C.²,

J.P.³

2015

Proceedings of the IODP

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Marine sediments are a primary reservoir for the long-term storage of organic matter, and the rate of burial and oxidation of this sedimentary organic material help to regulate both atmospheric oxygen and carbon dioxide concentrations. To evaluate the impact of circulating basement fluid on the preservation of deeply buried organic carbon, sedimentary profiles of dissolved and particulate organic carbon (DOC and POC) near the sediment/basement interface were obtained from sediment coring at Site U1363 during Integrated Ocean Drilling Program Expedition 327. Sedimentary DOC increased from 0.25 mM at 1 m below the seawater/sediment interface to a maximum of 0.86 mM at mid-depth (8-11 meters below seafloor [mbsf]), before subsequently decreasing to a minimum of 0.10 mM at the sediment/basement interface (222.7 mbsf). Thus, the oceanic basement appears to be a net sink for sedimentary DOC. Sedimentary DOC and alkalinity profiles were similar and inversely mirror those of sulfate, suggesting that the buildup of DOC in sediment pore water is related to remineralization of sedimentary POC. The sedimentary POC content at Site U1363 ranged from 47 to 391 µmol-C/g, with δ 13 C values from-25.3‰ to-22.4‰. The total particulate nitrogen (PN) content ranged from 4.1 to 32.9 µmol-N/g, with δ 15 N values from 1.8‰ to 7.2‰ and a POC:PN ratio of 12 ± 2 (n = 54). No depthspecific systematic variations in POC, PN, POC:PN ratio, δ 13 C-POC or δ 15 N-PN were detected, and no significant correlations between sedimentary DOC and POC concentrations were observed. Buried particulate organic matter (POM) in the sediment is mobilized to inorganic compounds such as carbon dioxide and ammonium by aerobic and anaerobic respiration and to dissolved organic matter (DOM) by processes including microbial hydrolysis and anoxic fermentation (

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The Diagenetic Factors Controlling the Dissolved Organic Carbon (DOC) in Pore Water from Deep Sea Sediments (ODP Leg 113|Weddell Sea)

Cited by 11 publications

References 29 publications

Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean.

Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean.

Sites 991/992/993

Data report: dissolved and particulate organic carbon in the deep sediments of IODP Site U1363 near Grizzly Bare seamount

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