INITIAL RESULTS OF STUDY ON SEDIMENTATION RATE, SEDIMENT SOURCE TO THE HA LONG BAY: EVIDENCE FROM THE 210Pb AND 137Cs RADIOTRACER
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https://doi.org/10.15625/1859-3097/16/1/6527Keywords:
Ha Long bay, clay mineralogy, the 210Pb and 137Cs radionuclides datings, sedimentation rates.Abstract
Ha Long bay is the World Natural Heritage, which annaually attracts a lot of foreign and domestic tourists. Nevertheless, in recent years, the landscape of Ha Long bay is devastated by many negative impacts-the shallowing of the bottom of bay is one of the great negative impacts. How is the shallowing of the bottom of Ha Long bay? What are reasons for the negative impacts? Based on the approach “source-to-sink” combined with results of clay mineral contents, results of 210Pb and 137Cs radionuclides, this study will contribute to clarifying the shallowing of the bottom of Ha Long bay. Results of smectite, illite and smectite/(illite+chlorite) ratios indicated that the sediment in Ha Long bay not only derives from the surrounding region of Ha Long bay but also derives from Red river system. Results of 210Pbex and 137Csex revealed the sedimentation rates in the Ha Long bay have varied between 0.47 - 0.75 cm/year over the last 100 years. It can be divided into four periods: period I (1920 - 1930); period II (1930 - 1960); period III (1960 - 1990); and period IV (1990 - 2011) with the average rate of 0.45 cm/year; 0.66 cm/year; 0.50 cm/year; and 0.85 cm/year respectively. The shallowing of the bottom of Ha Long bay was impacted by human activities such as building reservoirs, mining, urbanization or aquaculture etc.Downloads
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Vũ Duy Vĩnh, Trần Đức Thạnh, Cao Thị Thu Trang, 2012. Mô hình toán phục vụ đánh giá sức tải môi trường khu vực vịnh Hạ Long - Bái Tử Long. Tuyển tập Tài nguyên và Môi trường biển. Tập 17. Nxb. Khoa học tự nhiên và Công nghệ, Tr. 213-224.
Trần Đức Thạnh (chủ biên), Trần Văn Minh, Cao Thị Thu Trang, Vũ Duy Vĩnh, Trần Anh Tú, 2012. Sức tải môi trường vịnh Hạ Long - Bái Tử Long. Sách chuyên khảo. Thuộc Bộ sách chuyên khảo về Biển và đảo Việt Nam. Nxb. Khoa học tự nhiên và Công nghệ. 297 tr.
Allen, P. A., 2008. From landscapes into geological history. Nature, 451(7176): 274-276. DOI: https://doi.org/10.1038/nature06586
Strachnov, V., Larosa, J., Dekner, R., Zeisler, R., and Fajgelj, A., 1996. Report on the Intercomparison run IAEA-375: radionuclides in soil. IAEA/AL/075, IAEA, Vienna, Austria.
Goldberg, E. D., 1963. Geochronology with 210Pb. Radioactive dating, pp. 121-131.
He, Q., Walling, D. E., and Owens, P. N., 1996. Interpreting the 137Cs profiles observed in several small lakes and reservoirs in southern England. Chemical Geology, 129(1): 115-131. DOI: https://doi.org/10.1016/0009-2541(95)00149-2
Robbins, J. A., Holmes, C., Halley, R., Bothner, M., Shinn, E., Graney, J., Keeler, G., tenBrink, M., Orlandini, K. A., and Rudnick, D., 2000. Time-averaged fluxes of lead and fallout radionuclides to sediments in Florida Bay. Journal of Geophysical Research. C. Oceans, 105, 28805-28821. DOI: https://doi.org/10.1029/1999JC000271
Lu, X., 2004. Application of the Weibull extrapolation to 137Cs geochronology in Tokyo Bay and Ise bay, Japan. Journal of environmental radioactivity, 73(2): 169-181. DOI: https://doi.org/10.1016/j.jenvrad.2003.08.009
Huh, C. A., Chen, W., Hsu, F. H., Su, C. C., Chiu, J. K., Lin, S., Liu, C-S., and Huang, B. J., 2011. Modern (< 100 years) sedimentation in the Taiwan Strait: rates and source-to-sink pathways elucidated from radionuclides and particle size distribution. Continental Shelf Research, 31(1): 47-63. DOI: https://doi.org/10.1016/j.csr.2010.11.002
Huh, C. A., Su, C. C., Wang, C. H., Lee, S. Y., and Lin, I. T., 2006. Sedimentation in the Southern Okinawa Trough—Rates, turbidites and a sediment budget. Marine Geology, 231(1): 129-139. DOI: https://doi.org/10.1016/j.margeo.2006.05.009
Huh, C. A., Lin, H. L., Lin, S., and Huang, Y. W., 2009. Modern accumulation rates and a budget of sediment off the Gaoping (Kaoping) River, SW Taiwan: a tidal and flood dominated depositional environment around a submarine canyon. Journal of Marine Systems, 76(4): 405-416. DOI: https://doi.org/10.1016/j.jmarsys.2007.07.009
Appleby, P. G., and Oldfield, F., 1978. The calculation of 210Pb dates assuming a constant rate of supply of unsupported 210Pb to the sediments. Catena, 51-18. DOI: https://doi.org/10.1016/S0341-8162(78)80002-2
Albertazzi, S., Bellucci, L. G., Frignani, M., Giuliani, S., Romano, S., Cu, N. H., 2007. 210Pb AND 137Cs in Sediments of central Vietnam Coastal lagoons: Tentative Assessment of Accumulation Rates. Joural of Marine Science and Technology, 7(Supplement 1): 73-81.
Shukla, B. S., and Joshi, S. R., 1989. An evaluation of the CIC model of 210Pb dating of sediments. Environmental Geology and Water Sciences, 14(1): 73-76. DOI: https://doi.org/10.1007/BF01740587
Holtzapffel, T., 1985. Les minéraux argileux: préparation, analyse diffractométrique et détermination (Vol. 12). Société géologique du Nord.
Gibbs, R. J., 1977. Clay mineral segregation in the marine environment. Journal of Sedimentary Research, 47(1): 237-243. DOI: https://doi.org/10.1306/212F713A-2B24-11D7-8648000102C1865D
Liu, Z., C. Conlin et al., 2007. Climatic and tectonic controls on weathering in south China and Indochina Peninsula: Clay mineralogical and geochemical investigations from the Pearl, Red, adn Mekong drainage basins, Geochem. Geophys. Geosyst., 8, Q05005, doi:10.1029/2006GC001490. DOI: https://doi.org/10.1029/2006GC001490
Liu, Z., Zhao, Y., Colin, C., Siringan, F. P., and Wu, Q., 2009. Chemical weathering in Luzon, Philippines from clay mineralogy and major-element geochemistry of river sediments. Applied Geochemistry, 24(11): 2195-2205. DOI: https://doi.org/10.1016/j.apgeochem.2009.09.025
Petschick, R., 2000. MacDiff 4.2. 2 [online] Available: http://servermac. geologie. un-frankfurt. de. Rainer. html.
Folk, R. L., and Ward, W. C., 1957. Brazos River bar: a study in the significance of grain size parameters. Journal of Sedimentary Research, 27(1): 3-26 DOI: https://doi.org/10.1306/74D70646-2B21-11D7-8648000102C1865D
Blott, S. J., and Pye, K., 2001. GRADISTAT: a grain size distribution and statistics package for the analysis of unconsolidated sediments. Earth surface processes and Landforms, 26(11): 1237-1248. DOI: https://doi.org/10.1002/esp.261
Esquevin, J., 1969. Influence de la composition chimique des illites sur leur cristallinité. Bull. Centre Rech. Pau-SNPA, 3(1): 147-153.
Diekmann, B., Petsehick, R., Gingele, F. X., Fütterer, D. K., Abelmann, A., Brathauer, U., Gersonde, R., and Mackensen, A., 1996. Clay mineral fluctuations in Late Quaternary sediments of the southeastern South Atlantic: implications for past changes of deep water advection. In The South Atlantic (pp. 621-644). Springer Berlin Heidelberg. DOI: https://doi.org/10.1007/978-3-642-80353-6_31
Gingele, F. X., De Deckker, P., & Hillenbrand, C. D., 2001. Clay mineral distribution in surface sediments between Indonesia and NW Australia—source and transport by ocean currents. Marine Geology, 179(3): 135-146. DOI: https://doi.org/10.1016/S0025-3227(01)00194-3
Chen, P. Y., 1978. Minerals in bottom sediments of the South China Sea. Geological Society of America Bulletin, 89(2): 211-222. DOI: https://doi.org/10.1130/0016-7606(1978)89<211:MIBSOT>2.0.CO;2
Li, J., Gao, J., Wang, Y., Li, Y., Bai, F., & Cees, L., 2012. Distribution and dispersal pattern of clay minerals in surface sediments, eastern Beibu Gulf, South China Sea. Acta Oceanologica Sinica, 31(2): 78-87. DOI: https://doi.org/10.1007/s13131-012-0194-z
Choubert, G., Faure-Muret, A., Chanteux, P., 1975. Geological world atlas; scale 1:10,000,000, Commission for the Geological Map of the World; Unesco, Paris.
Wang, H., Saito, Y., Zhang, Y., Bi, N., Sun, X., and Yang, Z., 2011. Recent changes of sediment flux to the western Pacific Ocean from major rivers in East and Southeast Asia. Earth-Science Reviews, 108(1): 80-100. DOI: https://doi.org/10.1016/j.earscirev.2011.06.003
Dang, T. H., Coynel, A., Orange, D., Blanc, G., Etcheber, H., and Le, L. A., 2010. Long-term monitoring (1960-2008) of the river-sediment transport in the Red River Watershed (Vietnam): temporal variability and dam-reservoir impact. Science of the Total Environment, 408(20): 4654-4664. DOI: https://doi.org/10.1016/j.scitotenv.2010.07.007
Van den Bergh, G. D., Boer, W., Schaapveld, M. A. S., Duc, D. M., and Van Weering, T. C., 2007. Recent sedimentation and sediment accumulation rates of the Ba Lat prodelta (Red River, Vietnam). Journal of Asian Earth Sciences, 29(4): 545-557. DOI: https://doi.org/10.1016/j.jseaes.2006.03.006
Theng, T. L., Ahmad, Z., and Mohamed, C. A. R., 2003. Estimation of sedimentation rates using 210Pb and 210Po at the coastal water of Sabah, Malaysia. Journal of Radioanalytical and Nuclear Chemistry, 256(1): 115-120. DOI: https://doi.org/10.1023/A:1023312412149