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008201216t20202020oncab   ob   f000 0 eng d
020 |a9780660369334
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-ns|aln-----
0861 |aFs97-6/3415E-PDF
1001 |aZions, Vanessa S., |eauthor.
24510|aGrain size and trace metal concentrations on the Scotian Shelf : |bresults from the Thebaud offshore gas production platform and Gully MPA / |cby Vanessa S. Zions, Brent A. Law and Timothy G. Milligan.
264 1|a[Ottawa] : |bFisheries and Oceans Canada = Pêches et océans Canada, |c2020.
264 4|c©2020
300 |a1 online resource (viii, 124 pages) : |billustrations (some colour), colour maps.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian technical report of fisheries and aquatic sciences, |x1488-5379 ; |v3415
504 |aIncludes bibliographical references (pages 10-12).
5203 |a"Core samples were collected for sediment grain size and trace metal analysis from the Scotian Shelf in the summers of 2006 and 2007 from the vicinity of Thebaud gas production platform and the Gully Marine Protected Area (MPA). At Thebaud samples were collected along transects radiating from the platform in east, west, north-east and south-east directions. In the Gully, transects followed the canyon axis in a north-west to south-east orientation. All bottom sediment core samples were collected using a slow-corer which preserved the sediment-water interface. Cores were sectioned into 2 cm layers for sediment grain size and trace metal analysis. Sediment analysis from Thebaud revealed a median diameter (d50) that ranged from 158.14-385.03 μm with 0.20-6.04% of material residing in the mud fraction (<63 μm). The Gully had median diameters between 131.06-408.10 μm where mud made up 0.11-5.50% of material. For metals of interest (Zn, Fe, Mn, Ba, and Sr) concentrations were plotted against aluminum for grain size normalization and compared to background concentrations collected from sandy sediments throughout the Scotian and Newfoundland Shelfs. Elevated metal concentrations were measured at Thebaud throughout the sampling program, which may be indicative of drilling waste and produced water impacts. Elevated levels of metals were not detected in the Gully suggesting there was little evidence of hydrocarbon activities in the MPA"--Abstract, page vii.
546 |aIncludes abstracts in English and French.
650 0|aMarine sediments|zScotian Shelf.
650 0|aSediments (Geology)|xHeavy metal content|zScotian Shelf.
650 0|aOffshore gas well drilling|xEnvironmental aspects|zScotian Shelf.
650 0|aDrilling muds|xEnvironmental aspects|zScotian Shelf.
650 6|aSédiments marins|zNéo-écossaise, Plateforme.
650 6|aSédiments (Géologie)|xTeneur en éléments traces métalliques|zNéo-écossaise, Plateforme.
650 6|aGaz naturel|xPuits|xForage offshore|xAspect de l'environnement|zNéo-écossaise, Plateforme.
650 6|aBoues de forage|xAspect de l'environnement|zNéo-écossaise, Plateforme.
7101 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body.
7102 |aBedford Institute of Oceanography, |eissuing body.
830#0|aCanadian technical report of fisheries and aquatic sciences ;|v3415.|w(CaOODSP)9.504449
85640|qPDF|s5.70 MB|uhttps://publications.gc.ca/collections/collection_2020/mpo-dfo/Fs97-6-3415-eng.pdf