Hydrocarbon geochemistry of siliciclastic, microbial laminated deposits from Puck Bay, Poland

Maliński, Edmund; Witkowski, Andrzej; Synak, E.; Szafranek, Janusz; Osterroht, C.; Pihlaja, Kalevi

doi:10.1016/0146-6380(88)90117-9

Cited by 9 publications

(1 citation statement)

References 22 publications

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“…is about 1.5 or 1.0%o lighter than C37:2 alkenone or dinosterol, respectively. The lighter S13C values for diploptene may be explained by photosynthesis by cyanobacteria taken place around the base of the photic zone (Rohmer et al, 1984;Malinski et al, 1988;Schoell et al, 1994). These light 813C val ues for diploptene relative to those for C37:2 alkenone and dinosterol originated from phyto plankton indicate that heterotrophic bacteria can Japan Sea sediments 319 be excluded for a source because biomass of het erotrophic bacteria is expected to be similar or slightly enriched in 13C relative to autotrophs (e.g., algae) which is food source for heterotrophic bacteria (DeNiro and Epstein, 1977).…”

Section: Extraction Of Diploptenementioning

confidence: 99%

.DELTA.13 records of diploptene in the Japan Sea sediments over the past 25 kyr.

et al. 1997

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Stable carbon isotopic compositions were determined for diploptene in the sediment core KH-79-3, L 3 (core length: 235 cm) taken from the Oki Ridge in the southern part of the Japan Sea. Two major groups of diploptene with different 813C values were recognized. The first group appears in the 0-130 cm section (present to 10 kyr B.P.) of the core, the 813C values being -25.0 ± 0.7%o on average. Diploptene in this section should have originated from cyanobacteria. The second group which is strongly depleted in 13C ( 53.1 ± 5.3%o on average), is observed in the 145-204 cm section (12-21 kyr B.P.). Diploptene in this section might have originated from methanotrophic bacteria. This indicates that an anoxic bottom water condition was developed during 12-21 kyr B.P. (the last glacial period), which was perhaps caused by the development of seawater stratification in the Japan Sea.

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