| 摘要: |
| Sediment cores were collected from the remote subalpine Great Ghost Lake in southern Taiwan. Because the lake is anoxic the sediments are well preserved, distinctive past variations can be dated accurately. The vertical distributions of total and acid-leached metal concentrations for aluminum, arsenic, cadmium, cerium, chromium, cesium, copper, iron, magnesium, manganese, nickel, lead, rubidium, strontium, vanadium and zinc are measured and the fluxes determined. The dates of higher fluxes in the past 2600 years seem to correlate with dry spells. Further, trace metal fluxes show a large increase but Pb-206/Pb-207 ratios show a large decrease since 1950, suggesting a significant anthropogenic input. |
| 关键词: trace metals flux Great Ghost Lake Taiwan |
| DOI：10.18307/1998.sup35 |
| 分类号: |
| 基金项目:The authors wish to thank the Environmental Protection Administration (EPA-86-FA44-09-26 and 47) and the National Science Council (NSC85-2611-M-110-003GP) for supporting this research. |
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| Flux of Metals in Great Ghost Lake in Taiwan in the Past 2600 Years |
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Chen-Tung Arthur Chen, Jen-Kang Wann
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Institute of Marine Geology and Chemistry, National Sun Yat-Sen University Kaohsiung 80424, Taiwan, China
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| Abstract: |
| Sediment cores were collected from the remote subalpine Great Ghost Lake in southern Taiwan. Because the lake is anoxic the sediments are well preserved, distinctive past variations can be dated accurately. The vertical distributions of total and acid-leached metal concentrations for aluminum, arsenic, cadmium, cerium, chromium, cesium, copper, iron, magnesium, manganese, nickel, lead, rubidium, strontium, vanadium and zinc are measured and the fluxes determined. The dates of higher fluxes in the past 2600 years seem to correlate with dry spells. Further, trace metal fluxes show a large increase but Pb-206/Pb-207 ratios show a large decrease since 1950, suggesting a significant anthropogenic input. |
| Key words: trace metals flux Great Ghost Lake Taiwan |
