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| Titel |
Sediment analyses of the OR1-1120 cores from the Palm Ridge, offshore southwestern Taiwan |
| VerfasserIn |
Yin-Sheng Huang, Chih-Chieh Su, Jin-Yi Lin, Zheng-Wei Su, Shu-Kun Hsu |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250145275
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| Publikation (Nr.) |
 EGU/EGU2017-9198.pdf |
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| Zusammenfassung |
| In the study, we analyze marine sediment cores obtained from the Palm Ridge, offshore
southwestern Taiwan, during the OR1-1120 cruise to study the sediment properties and
understand the variation of the deposition environment. Geophysics investigating including
multi-beam echo sounder, chirp sonar, and sub-bottom profiles (SBP) provides fundamental
information of the study area. Also these geophysics data give the information for the core
sites decision. Core sites were adopted based on some critical geology conditions: Core site
S1 was the location where gas-plume was observed in the chirp sonar; Core sites S3 and
S5 located at a mass transported deposit (MTD) stratum which were determined
from the sub-bottom profiles (SBP); S6 was situated at a modern stratum above the
same MTD stratum. By the MSCL (Multi Sensor Core Logger) results, both S1
and S6 cores show that the two core sites located at relatively stable deposition
environments. The apparent sedimentation rates of S1 and S6 for the last ∼100 years,
determined by using the 210Pb analysis, are 0.026±0.009 and 0.070±0.016 cm/a,
respectively. For the core sites of S3 and S5, several peak values are observed in
the MSCL parameters. Also the apparent sedimentation rates of both cores could
not be determined. These features might imply the relatively unstable deposition
environments at the core sites of S3 and S5. This is also in good agreement with the
information from the SBP results that the two cores located at a MTD stratum. |
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