Organic Properties of Sediments and Amino Acids in Interstitial Waters from the Flank of the Costa Rica Rift, Galapagos Spreading Center (ODP Sites 677 and 678)

Kawahata, Hodaka; Ishizuka, T.

doi:10.2973/odp.proc.sr.111.130.1989

Cited by 11 publications

(12 citation statements)

References 29 publications

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“…The concentration of DCAA can be calculated by subtracting the DFAA concentration from the THAA concentration in the interstitial waters from Sites 790 and 791 (Table 4 and ( Siegel and Degens, 1966;Kawahata and Ishizuka, 1989;Lee and Bada, 1975). The mean values and relative abundances of acidic, basic, neutral, aromatic, and sulfur-containing amino acids are 2.29 (22 mol%), 0.60 (6 mol%), 6.70 (65 mol%), 0.09 (1 mol%), and 0.00 µmol/L (0 mol%), respectively.…”

Section: Dcaa In Interstitial Watersmentioning

confidence: 99%

“…Thus, the dissolved combined amino acids (DCAA) in interstitial waters as well as the DFAA seem to be sensitive and important indicators of early diagenesis. However, little work on this subject, particularly on DCAA in interstitial waters, has been done (Ishizuka et al, 1988;Kawahata and Ishizuka, 1989;Kawahata et al, 1990;Ishizuka et al, 1990). Therefore, this paper presents the results of the DFAA, DCAA, and total hydrolyzable amino acids (THAA) in interstitial waters collected Taylor, B., Fujioka, K., et al, 1992.…”

Section: Introductionmentioning

confidence: 99%

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Amino Acids in Interstitial Waters from Sites 790 and 791 in the Izu-Bonin Island Arc

Kawahata¹,

Ishizuka²

1992

Proceedings of the Ocean Drilling Program

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Sites 790 and 791 lie in the eastern half graben of the Sumisu Rift, a backarc graben west of the active Izu-Bonin arc volcanoes Sumisu Jima and Tori Shima, at 30°54.96'N, 139°50.66Ti, in 2223 m water depth and 30°54.97'N, 139°52.20'E, in 2268 m water depth, respectively. A small decrease in the sulfate concentration in the interstitial waters from these sites suggests fairly low microbial activity by sulfate-reducing bacteria.The values of the dissolved free amino acids (DFAA) in the interstitial waters from both sites range from 1.26 to 6.82 µmol/L, with an average of 3.81 µmol/L. The acidic, basic, neutral, aromatic, and sulfur-containing amino acids have average values of 0.32, 0.50, 2.71, 0.15, and 0.09 µmol/L, respectively. The relative abundances of the acidic, basic, neutral, aromatic, and sulfur-containing amino acids average 8, 13,72,4, and 1 mol%, respectively. Glycine, serine, alanine, ornithine, and aspartic acid are major constituent amino acids. The dissolved combined amino acids (DCAA) values range between 1.25 and 44.35 µmol/L, with an average of 10.36 µmol/L. The mean concentrations and relative abundances of the acidic, basic, neutral, aromatic, and sulfur-containing amino acids are 2.29 (22 mol%), 0.60 (6 mol%), 6.70 (65 mol%), 0.09 (1 mol%), and 0.00 µmol/L (0 mol%), respectively. Glycine is the most abundant amino acid residue, followed by glutamic acid, serine, and alanine. The predominance of DCAA over DFAA present in the interstitial waters from Sites 790 and 791 is consistent with previous results from interstitial-water and seawater analyses.The most plausible source for the DCAA is biogenic calcareous debris. A much greater depletion of aspartic acid and the basic fraction, except for ornithine, is found in the DCAA. The decomposition of the basic amino acid fraction or its incorporation to clay minerals would result in a decrease in its relative abundance, whereas ornithine is produced during early diagenesis. The characteristics of the amino acids in the interstitial waters are (1) a greater depletion of the acidic amino acid fraction in the DFAA than in the DCAA and (2) the enrichment of glycine and serine in both. The adsorption or reaction of the amino acids in interstitial waters with biogenic carbonates would be responsible for the lower relative abundance of the acidic fraction of the DFAA. The production of glycine during early diagenesis and its stability in solution would raise its relative abundance in the interstitial waters.

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Section: Dcaa In Interstitial Watersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Amino Acids in Interstitial Waters from Sites 790 and 791 in the Izu-Bonin Island Arc

Kawahata¹,

Ishizuka²

1992

Proceedings of the Ocean Drilling Program

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“…The reason is that the profiles of total DCAA, THAA, and DFAA are much affected by those of their neutral amino acid fractions, since they account for more than 50% of relative abundance of amino acids. Kawahata and Ishizuka (1989) found greater concentrations of DCAA than DFAA in interstitial water from biogenic carbonate and silica-rich sediments from the Panama Basin. The mean concentrations of DCAA and DFAA are 5.1 and 3.2 itmol/L, respectively.…”

Section: The Ratio Of Combined Amino Acids To Dfaa In Interstitial Wamentioning

confidence: 99%

“…Therefore clay minerals did not seriously interfere with the amino acid composition although the sediments from Hole 677A contain appreciable amount of clay minerals. Kawahata and Ishizuka (1989) interpreted the lower relative abundance of acidic fractions of DFAA than THAA in interstitial water from Hole 677A as due to the adsorption or reaction with carbonates which are abundant in the sediments. Since the abundance of biogenic or inorganic carbonates is quite low (less than 2%) in Hole 695A, carbonates could not control the acidic fraction in interstitial waters.…”

Section: Dfaa In Interstitial Watersmentioning

confidence: 99%

“…Dissolved amino acids in interstitial waters are very sensitive indicators of the chemical and biological processes occurring in the sedimentary column. However, detailed analyses of dissolved free and total hydrolyzable amino acids (DFAA and THAA) in interstitial waters have not, until this study, been extended to sediments buried deeper than 30 m (Kawahata and Ishizuka, 1989).…”

Section: Introductionmentioning

confidence: 99%

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Amino Acids in the Interstitial Waters from ODP Site 695 in the Weddell Sea|Antarctic Ocean

Kawahata¹,

Ishizuka²,

Nagao³

1990

Proceedings of the Ocean Drilling Program

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Site 695 lies on the southeast margin of the South Orkney microcontinent on the northern margin of the Weddell Sea, at 62°23.48'S, 43°27.10'W in 1305 m water depth. The inorganic properties of interstitial waters at this site, including sulfate reduction, biogenic methane production, and high concentrations of ammonia and phosphate, imply high microbial activity. However, no clear relationship between amino acid composition and concentration and the type of microbial activity (e.g., sulfate reduction or methane production) can be identified.The THAA (total hydrolyzable amino acids) values range between 2.45 and 17.31 jumol/L, averaging 7.14 ^mol/L. The mean concentrations and relative abundance values of acidic, basic, neutral, aromatic, and sulfur-containing amino acids are 1.34 (18%), 1.09 (15%), 3.93 (54%), 0.50 (8%), and 0.02 (0%) /xmol/L, respectively. Glycine is the most abundant amino acid residue, with serine, glutamic acid, and ornithine next. The DFAA (dissolved free amino acids) values range from 0.10 to 12.73 junol/L, averaging 4.07 /rniol/L. The acidic, basic, neutral, aromatic, and sulfurcontaining amino acids are on average 0.21, 0.79, 2.56, 0.41, and 0.01 /xmol/L, respectively. The relative abundances of acidic, basic, neutral, and aromatic amino acids average 4%, 18%, 58%, and 15%, respectively.Predominance of DFAA over DCAA (dissolved combined amino acids) in interstitial waters of Lithologic Units I and II is contrary to the predominance of DCAA over DFAA in other interstitial waters and seawater.The comparison of amino acid compositions between DCAA and siliceous plankton suggests that the DCAA in interstitial waters originally comes from amino acids derived from siliceous plankton. However, other sources which are much enriched in glutamic acid contribute to the DCAA composition.

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Vertical distribution of amino acids and chiral ratios in deep sea hydrothermal sub-vents of the Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean

Takano

Horiuchi

Marumo

et al. 2004

Organic Geochemistry

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Organic Properties of Sediments and Amino Acids in Interstitial Waters from the Flank of the Costa Rica Rift, Galapagos Spreading Center (ODP Sites 677 and 678)

Cited by 11 publications

References 29 publications

Amino Acids in Interstitial Waters from Sites 790 and 791 in the Izu-Bonin Island Arc

Amino Acids in Interstitial Waters from Sites 790 and 791 in the Izu-Bonin Island Arc

Amino Acids in the Interstitial Waters from ODP Site 695 in the Weddell Sea|Antarctic Ocean

Vertical distribution of amino acids and chiral ratios in deep sea hydrothermal sub-vents of the Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean

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