Magnetometry as a tool to estimate the pollution of marine environment around small shipwrecks (Gulf of Gdańsk) - preliminary results

Magdalena Gwizdała , Maria Jeleńska , Leszek Łęczyński

Abstract

Magnetic properties of deposits around the shipwrecks (“Munin” and “Abille”) in the Gulf of Gdańsk were investigated. Values of magnetic susceptibility (χ) are relatively low; however, they reveal significant differences between investigated sites. The values of χ around “Abille” wreck were 5-8×10-8 m3/kg. Around “Munin” wreck results were more diversified reaching value of χ between 3.07×10-8m3/kg and 12.92×10-8 m3/kg. The spatial variability of χ coincided with near-bottom water currents distribution in the Gulf of Gdańsk. Magnetic minerals were identified by thermomagnetic analysis. Around “Abille” wreck we have found magnetite with small amount of maghemite or hematite. The “Munin” sediments include only one magnetic phase; in several samples it is magnetite, in the others — maghemite. Day—Dunlop plot shows that “Abille” set is shifted towards lower magnetization ratio and higher coercivity ratio. The correlation between the distribution of χ and hydrodynamic condition around shipwrecks allows to determine the direction of contaminant transport.
Author Magdalena Gwizdała
Magdalena Gwizdała,,
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, Maria Jeleńska
Maria Jeleńska,,
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, Leszek Łęczyński (FOG / IO / DMG)
Leszek Łęczyński,,
- Division of Marine Geology
Journal seriesActa Geophysica, ISSN 1895-6572, e-ISSN 1895-7455, (A 20 pkt)
Issue year2016
Vol64
No5
Pages1691-1702
Publication size in sheets0.55
Keywords in Englishenvironmental magnetism, magnetic susceptibility, sediment pollution, shipwrecks
ASJC Classification1908 Geophysics
DOIDOI:10.1515/acgeo-2016-0056
URL https://link.springer.com/content/pdf/10.1515%2Facgeo-2016-0056.pdf
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa - Użycie Niekomercyjne - Bez utworów zależnych (CC-BY-NC-ND); with publication
Score (nominal)20
ScoreMinisterial score = 20.0, 24-07-2019, ArticleFromJournal
Ministerial score (2013-2016) = 20.0, 24-07-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.901; WoS Impact Factor: 2016 = 0.968 (2) - 2016=1.27 (5)
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