Magnetic susceptibility (MS) represents a high resolution environmental and lithological (LITHO) proxy tool, which is successfully used for the study of recent sediments in freshwater or marine aquatic environments. The studies that we have achieved in the last 40 years in the Danube – Danube Delta – Black Sea hydrosedimentary system have revealed strong connections between the characteristics of sedimentary environment, sediment quality and their magnetic properties. In the present paper are discussed results concerning several lakes from Gorgova − Uzlina Depression (Danube Delta), which are added to the lately published magneto-lithological data for sedimentary environments of Meşteru − Fortuna and Matiţa − Merhei depressions. This work, which represents the first part of a composite paper, is particularly focused on the sediment cores collected in the lakes Gorgova, Cuibeda, Uzlina and Isacova. Their MS characterization, not neglecting the lithological support, defined by the three main components, namely the SILiciclastic/ minerogenic fraction – SIL,Total Organic Matter – TOM and CARbonates – CAR, is approached. Several lithological units are identified, based upon the macroscopic characteristics, magnetic properties and lithological composition. It is interesting to note that although the study area is included in the fluvial delta plain, the recent lacustrine sediments are very thin in some sectors and the short cores (under 60 cm) stop at a level of marine clays (L. Cuibeda). The second part of this study, regarding the surficial sediments from the above-mentioned lakes, and more other ones is published inside of a similar magneto-lithogenetic context. All these data give new evidences for demonstrating the availabilities of the method used to identify the environmental influences on the magnetic susceptibility of lake sediments, and hence to assess the geoecological state of the deltaic area under attention.
Catianis, I., Rădan, S., Grosu, D. (2013) − Distribution of lithological components of recent sediments from some lakes in the Danube Delta; environmental significance, Carpath. J. Earth Environ. Sci., 8, 2, 55-68.
Catianis, I., Rădan, S., Grosu, D. (2014) − Loss of ignition as a proxy indicator for assessing the lithological composition of the recent sediments accumulated in some freshwater lakes from the Danube Delta, Romania, Inter. J. Innov. Appl. St., ISSN 2028-9324, 9, 1, 260-278.
Dean, W.E. (1974) − Determination of carbonate and organic matter in calcareous sediments and sedimentary rocks by loss on ignition: comparison with other methods, Journal of Sedimentary Petrology, 44, 242-248.
Egli, R. (2003) − Environmental influences on the magnetic properties of lake sediments, PhD Thesis, Swiss Federal Institute of Technology, Zurich, 328p. (with an Appendix). Rădan, S.-C., Rădan, S. (2007a) − A magnetic susceptibility scale for lake sediments; inferences from the Danube Delta and the Razim - Sinoie lagoonal Complex (Romania), Geo-Eco-Marina, 13, Bucureşti - Constanţa, 61-74.
Rădan, S.-C., Rădan, S. (2007b) − The magnetic signature of present environmental changes in lake sediments induced by hydrotechnical works; a case study from the Danube Delta (Romania), the XXIVth IUGG General Assemby, "Earth: Our changing planet", July 2 – 13, 2007, Abstracts, IAGA, Inter-Association Symposia and Workshops, published by Umbria Sci. Meet. Ass. (USMA), Perugia, Italy, December, 2007, Abstract 3104, p. 156. http://www.iugg- 2007perugia.it/iuggProc/A.pdf
Rădan, S.-C., Rădan, S. (2007c) − Modern Sediments as Enviromagnetic Archives. A Case Study: Danube Delta and Northwestern Black Sea, EOS Transactions, American Geophysical Union, 88 (52), Fall Meet. Suppl., 10 - 14 December, 2007, San Francisco, USA, Abstract GP53B-1220.
Rădan, S.-C., Rădan, S. (2010a) – The use of the magnetic susceptibility to study hydrosedimentary environments and processes in Danube Delta, Geo-Eco-Marina, 16, Bucureşti - Constanţa, 37-46.
Rădan, S.-C., Rădan, S. (2010b) – Lake sediments fingerprinting in the Danube Delta, using composite magneto-lithological signatures; an environmental approach, Travaux Géophysiques, XXXIX, Abstracts of the 12th "Castle Meeting − New Trends in Geomagnetism. Palaeo, Rock and Environmental Magnetism", Castle of Nové Hrady, Czech Republic, August 29 - September 4, 2010, 68-69.
Rădan, S.-C., Rădan, S. (2011) − Recent sediments as enviromagnetic archives. A brief overview, Geo-Eco-Marina, 17, Bucureşti - Constanţa, 103-122.
Rădan, S.-C., Rădan, S., Catianis, I. (2013) − The use of the magnetic susceptibility record as a proxy signature for the lithological composition of lake sediments: Evidences from Danube Delta short cores in the Meşteru − Fortuna Depression (Danube Delta), Geo- Eco-Marina, 19, Bucureşti - Constanţa, Romania, 77-105.
Rădan, S.-C., Rădan, S., Catianis, I. (2014a) − Relationship between the magnetic susceptibility and lithological composition in sediment cores from lakes of Matiţa − Merhei Depression (Danube Delta, Romania): Towards a proxy method of sedimentological and environmental fingerprinting, Geo-Eco-Marina, 20, Bucureşti - Constanţa, ISSN: 2248–2776 ISSN-L: 1224–6808, 45-86.
Rădan, S.-C., Rădan, S., Catianis, I., Scrieciu, A. (2014b) − Magnetosusceptibility and lithological fingerprints of the marine clays recovered from sediment cores taken in the Danube Delta (Romania), p. 30. In: L Török (Ed.) − "Deltas and Wetlands" (Book of abstracts), vol. 2, Conference "BSB Net-Eco − Deltas and Wetlands."Environmental aspects and available scientific tools for Black Sea Basin protection" (Tulcea, Romania, 15 - 17 September, 2014), Danube Delta Technological Information Center Publishing House, Tulcea, Romania, ISSN 2344-3766; DOI: 10.14592/DDI.D. W.02. 2014, 48p.
Rădan, S.-C., Rădan, S., Catianis, I., Scrieciu, A. (2014c) − Composite enviromagnetic and lithological signatures retrieved from recent sediments in the Danube Delta (Romania), with a special view to the couples of lakes, 14th Castle Meeting "New Trends on Paleo, Rock and Environmental Magnetism", 31st August - 6th September 2014, Évora, Portugal. https://www.fc.ul.pt/sites/default/ files/fcul/public/14Castle_meeting/Radan1_Castle%20Meeting_ Portugal_Abstract-Paper%201_Danube-Delta_Radan-etal_ Romania.pdf.
Rădan, S.-C., Rădan, S., Catianis, I., Scrieciu, A. (2014d) − Towards assessing the potential for stratigraphic studies in the Danube Delta geo-environments by using magnetosusceptibility and lithological records retrieved from Recent sediments, 127- 128, 203 (Appendix 10/Fig. A11). In: A.V. Borodin, E.A. Markova, T.V. Strukova (Eds.) − "The Quaternary of the Urals: Global trends and Pan-European Quaternary records", International Conference, INQUA- SEQS 2014 (Ekaterinburg, Russia, September 10 - 16, 2014), Ekaterinburg, UrFU, ISBN 978-5-321-02398-3, 228p.
Rădan, S.-C., Rădan, S., Scrieciu, A. (2015)− Environmental influences on the magnetic susceptibility of recent sediments in Danube Delta, in geoecological context: insights from lakes of Gorgova − Uzlina Depression, p. 29, In: Török L. (ed.), "Deltas and Wetlands" (Book of abstracts), vol. 3, Danube Delta Technological Information Center Publishing House, Tulcea, Romania, ISSN 2344-3766; DOI: 10.14592/ DDI.D.W.03.2015, 45 p.
Rădan, S.C., Rădan, S., Catianis, I., Grosu, D., Pojar I., Scrieciu, A. (2016) − An environmental magneto-lithogenetic study in the lakes of the Gorgova − Uzlina Depression (Danube Delta, Romania). II. Insights from surficial sediments, Geo-Eco-Marina, 22, Bucureşti - Constanţa (this volume).
Trodahl, M. I. (2010) − Late Holocene Sediment Deposition in Lake Wairarapa, M.Sc. Thesis, submitted to Victoria University of Wellington, New Zealand, 114p.