Title page for etd-0714100-131747


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URN etd-0714100-131747
Author Tzu-Shen Chuang
Author's Email Address pc006557@ksmail.seed.net.tw
Statistics This thesis had been viewed 4639 times. Download 824 times.
Department Marine Geology and chemistry
Year 1999
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Temporal and Spatial Variability of Organic Carbon Isotopic Compositions of Particles Collected from Sediment Traps in the Western Okinawa Trough
Date of Defense 2000-06-23
Page Count 73
Keyword
  • Organic Carbon
  • Carbon isotope
  • Sediment Trap
  • Okinawa Trough
  • 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.
    Advisory Committee
  • Y.C. Chung - chair
  • J.J. Hung - co-chair
  • Song-Lin Cheng - co-chair
  • D.D. Sheu - advisor
  • Files
  • 莊子賢論文-1.pdf
  • indicate access worldwide
    Date of Submission 2000-07-14

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