A sedimentation study of St. Ana Lake (Romania) applying the 210Pb and 137Cs dating methods
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- 作者：Robert Csaba Begy (1)
Alida Timar-Gabor (1)
Janos Somlai (2)
Constantin Cosma (1) - 关键词：210Pb dating ; alpha spectrometry ; gamma spectrometry ; 137Cs ; sedimentation rate
- 刊名：Geochronometria
- 出版年：2011
- 出版时间：June 2011
- 年：2011
- 卷：38
- 期：2
- 页码：93-100
- 全文大小：1316KB
- 参考文献：1. Appleby PG, 2001. Chronostratigraphic techniques in recent sediments. In: Last WM and Smol JP, eds., / Tracking environmental Change Using Lake Sediments. Volume 1-Basin Analysis, Coring, and Chronological Techniques. Kluwer: 171-03.
2. Appleby PG and Oldfield F, 1978. The calculation of lead-210 dates assuming a constant rate of supply of unsupported 210Pb to the sediments. / Catena 5(1): 1-, DOI 10.1016/S0341-8162(78)80002-2. CrossRef
3. Arnaud F, Magand O, Chapron E, Bertrand S, Boes X, Charlet F and Melieres MA, 2006. Radionuclide dating (210Pb, 137Cs, 241Am) of recent lake sediments in a highly active geodynamic setting (Lakes Puyehue and Icalma-Chilean Lake District). / Science of the Total Environment 366(2-): 837-50, DOI 10.1016/j.scitotenv.2005.08.013. CrossRef
4. Begy R, Cosma C and Timar A, 2009. Recent changes in Red Lake (Romania) sedimentation rate determined from depth profiles of 210Pb and 137Cs radioisotopes. / Journal of Environmental Radioactivity 100(8): 644-48, DOI 10.1016/j.jenvrad.2009.05.005. CrossRef
5. Carroll J, Williamson M, Lerche I, Karabanov E and Williams D.F, 1999a. Geochronology of Lake Baikal 210Pb and 137Cs radioisotopes. / Applied Radiation and Isotopes 50(6): 1105-119, DOI 10.1016/S0969-8043(98)00116-X. CrossRef
6. Carroll J, Lerche I, Abraham J D, Cisar D J, 1999b. Sediment ages and flux variations from depth profiles of 210Pb: lake and marine examples. / Applied Radiation and Isotopes 50(4): 793-04, DOI 10.1016/S0969-8043(98)00099-2. CrossRef
7. Matthews KM, Chang-Kyu Kim and Martin P, 2007. Determination of 210Po in environmental materials: A review of analytical methodology. / Applied Radiation and Isotopes 65(3): 267-79, DOI 10.1016/j.apradiso.2006.09.005. CrossRef
8. McDonald CP and Urban NR, 2007. Sediment radioisotope dating across a stratigraphic discontinuity in a mining-impacted lake. / Journal of Environmental Radioactivity 92(2): 80-5, DOI 10.1016/j.jenvrad.2006.09.009. CrossRef
9. Orbán B, 1869. / Székelyf?ld leírása, Háromszék (The description of Székelyf?ld, Háromszék). Európai Id? kiadó, Pest (in Hungarian).
10. Pándi G and Magyari-Sáska Zs, 2007. / Turismul la lacul Sfanta Ana Geografia ?n contextul dezvolt?rii contemporane (The tourism at the Saint Ana Lake. The geography in the context of contemporary evolution.). / Presa Universitar? Clujean? ISSN 1843-2158: 255-64. (in Romanian).
11. Pisota I and Nastase A, 1957. / Lacul Sf Ana, Natura anul IX (The St. Ana Lake, The Nature year IX). Editura de stat pentru imprimate si publicatii, Bucuresti (in Romanian).
12. Robbins JA and Edgington DN, 1975. Determination of recent sedimentation rates in Lake Michigan using Pb-210 and Cs-137. / Geochimica et Cosmochimica Acta 39: 285-04. CrossRef
13. Saravana Kumar U, Navada SV, Rao SM, Nachiappan RmP, Kumar B, Krishnamoorthy TM, Jha SK and Shukla VK, 1999. Determination of recent sedimentation rates and pattern in Lake Naini, India by 210Pb and 137Cs dating techniques. / Applied Radiation and Isotopes 51(1): 97-05, DOI 10.1016/S0969-8043(98)00148-1. CrossRef
14. Schmidt S, Jouanneau JM, Weber O, Lecroart P, Radakovitch O, Gilbert F and Jezequel D, 2007. Sedimentary processes in the Thau Lagoon (France): From seasonal to century times scales. / Estuarine, Coastal and Shelf Science 72(3): 534-42, DOI 10.1016/j.ecss.2006.11.019. CrossRef
15. Sikorski J and Bluszcz A, 2008. Application of γ and α spectrometry in the 210Pb method to model sedimentation in artificial retention reservoir. / Geochronometria 31: 65-5, DOI 10.2478/v10003-008-0019-4. CrossRef
16. Sikorski J and Goslar T, 2003. Inventory of sediment of the dammed lake in Koz?owa Góra and first measurements of 210Pb activities in the lake deposits. / Geochronometria 22: 55-2.
17. Sl?voac? D and Avramescu C, 1956. / Observa?ii geologice, litologice ?i hidrogeologice ?n masivul Sf. Ana (mun?ii Bodocului) (Geological, lithological and hydrogeological observations in the st. Ana massive (the Bodocului Mountains)). Comunic?rile Academiei 3. VI, Bucure?ti (in Romanian).
18. Tylmann W, 2004. Estimating recent sedimentation rates using 210Pb on the example of morphologically complex lake (Upper lake Radunskie, N Poland). / Geochronometria 23: 21-6. - 作者单位：Robert Csaba Begy (1)
Alida Timar-Gabor (1)
Janos Somlai (2)
Constantin Cosma (1)
1. Faculty of Environmental Science, Babes-Bolyai Universityc, 400294, Cluj Napoca, Fantanele nr. 30, Romania
2. Department of Radiochemistry, University of Pannonia, 8200, Veszprén, Egyetem nr. 10, Hungary - ISSN：1897-1695
文摘
The biggest problem with most lakes that have no contact with other water sources and are being charged by precipitation is the massive eutrophication. The aim of this work was to determine the sedimentation rate in order to evaluate the progress of eutrophication for St. Ana Lake (Ciomad Mountain near the B?ile Tu?nad in Harghita County (Romania)). The concentration of 210Pb was determined by means of high resolution gamma spectrometry as well as derived from 210Po activity which was measured through alpha spectrometry; values obtained are in good agreement. For the excess 210Pb activity values between 4.0±0.5 Bq/kg and 218±20 Bq/kg have been found. As an alternative method, the 137Cs dating method was applied as well. Calculated mass sedimentation rates are in the range of 0.06±0.01 to 0.32±0.05 g/cm2 year with a mean of value of 0.15±0.02 g/cm2 year. Linear sedimentation rates yielded much higher sedimentation values (between 0.5±0.1 and 7.9±0.7 cm/year with a mean of 2.4±0.6 cm/year), due to the predominant organic matter composition and the long suspension time of the sediment. This is an indication for the process of eutrophication which will probably lead to the transformation of the lake into a peat bog.