A PROMISING METHODOLOGY FOR THE DETECTION OF POCKMARKS ACTIVATION IN NEARSHORE SEDIMENTS

Autor:	Athanasia Koliadima, J. Kapolos, J. Ravasopoulos, George Papatheodorou, Maria Geraga, K. Xenos
Rok vydání:	2002
Předmět:	Total organic carbon Pollution General Chemical Engineering Pockmark media_common.quotation_subject Mineralogy Sediment Sedimentation Grain size chemistry.chemical_compound chemistry Carbonate Transect Instrumentation Geology General Environmental Science media_common
Zdroj:	Instrumentation Science & Technology. 30:139-155
ISSN:	1525-6030 1073-9149
DOI:	10.1081/ci-120003894
Popis:	A promising methodology for the detection of pockmarks activation is suggested in the present work. Thirteen sediment cores were collected from the eastern part of the Gulf of Patras in an active pockmark field area. Cores were collected both inside and outside pockmarks. The upper 2 cm (surficial sample) from each core was analysed for grain size, organic carbon (Corg), Ca, Fe, Co, Cu, Mn, Pb, and Zn concentrations. In order to investigate any potential effect of the pockmark field activity on the distribution of heavy metals in the surficial sediments, an R-mode factor analysis was applied onto the grain size classes, Corg and metals concentrations. Factor analysis shows three main factors: a domestic sewage pollution factor, the Mn/Fe oxides, and the carbonate sedimentation. The increased sandy material, the low Corg content, as well as the lack of Corg/heavy metals association follows a specific NW-SE transect in the centre of the surveyed pockmark field, suggesting pockmarks activity. Based...
Databáze:	OpenAIRE
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