| URN |
etd-0714100-131747 |
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| Author |
Tzu-Shen Chuang |
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| Author's Email Address |
pc006557@ksmail.seed.net.tw |
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| Statistics |
This thesis had been viewed 4500 times. Download 709 times. |
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| Department |
Marine Geology and chemistry |
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| Year |
1999 |
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| Semester |
2 |
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| Degree |
Master |
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| Type of Document |
|
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| Language |
zh-TW.Big5 Chinese |
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| Title |
Temporal and Spatial Variability of Organic Carbon Isotopic Compositions of Particles Collected from Sediment Traps in the Western Okinawa Trough |
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| Date of Defense |
2000-06-23 |
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| Page Count |
73 |
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| Keyword |
Organic Carbon
Carbon isotope
Sediment Trap
Okinawa Trough
|
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| Abstract |
Abstract
This study is to investigate the spatial and temporal variabilities of geochemical and carbon isotopic compositions of particles collected in the region off northeast Taiwan. Organic carbon isotopic compositions (d13Corg), total organic carbon content (TOC) and C/N ratio were determined in sediment particles collected at different water depths from three time-series sediment traps (at T12, T13, and T18 stations, respectively). The results showed abnormally high mass fluxes than those previously found. Generally they increase with water depths, implying both the transport from Lanyang-Hsi River and the resuspension from the seafloor. TOC contents range from 0.5 to 1.5wt% and decrease with depths. This can be attributed to changes in the surface productivity, lateral transport and organic preservation. The organic carbon isotopic compositions range between -21 and -25o/oo, which falls well within the d13Corg values of continental margin sediments. The lower d13Corg values at T12 station than those at T13 station can be attributed to the large terrestrial inputs. It is noted that d13Corg values decrease with depths, suggesting a significant contribution of the horizontal transport of particles to the settling process. |
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| Advisory Committee |
Y.C. Chung - chair
J.J. Hung - co-chair
Song-Lin Cheng - co-chair
D.D. Sheu - advisor
|
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| Files |
indicate access worldwide |
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| Date of Submission |
2000-07-14 |
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