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Nizou, Jean; Demory, François; Dubrulle-Brunaud, Carole (2015): Magnetic measurements performed on sediments from the Bay of Seine seafloor (France) from 2011 to 2013 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.830212, Supplement to: Nizou, J et al. (2016): Monitoring of dredged-dumped sediment dispersal off the Bay of the Seine (northern France) using environmental magnetism. Comptes Rendus Geoscience, 348(6), 451-461, https://doi.org/10.1016/j.crte.2015.02.005

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Published: 2015-05-07 • DOI registered: 2015-07-01

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Abstract:
Impact and monitoring of dredge spoils are an important environmental issue. This investigation aims to map two dredge-spoil dispersals in the Bay of Seine by using an innovative application of well-established environmental magnetic proxies. Low-field magnetic susceptibility measurements were performed on discrete samples from dredge sediments and from the Bay of Seine seafloor before & after dumping. The fingerprinting of the dispersion of dredge-dumped sediments is efficient due to the higher susceptibility of the dredge sediments with respect to the background. Besides, terrestrial input is also monitored in our susceptibility maps. Dilution of the susceptibility signal allows an estimation of the resilience of the sedimentary environment on a six-month survey. This susceptibility signal is controlled by the ferromagnetic fraction of the sediment. A constant magnetic mineralogy carried by magnetite is observed in the study area, thus a qualitative parameter for magnetic grain size was selected that shows an in-progress resilience pattern over the survey.
Source:
Magnetic measurements performed on sediments from the Bay of Seine seafloor (France) as zip archive (2015). PangaeaData.zip
Coverage:
Median Latitude: 49.440628 * Median Longitude: -0.057114 * South-bound Latitude: 49.312382 * West-bound Longitude: -0.386060 * North-bound Latitude: 49.540096 * East-bound Longitude: 0.295701
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets

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Datasets listed in this publication series

  1. Nizou, J; Demory, F (2015): Downcore specific low-field magnetic susceptibility of 4 cores from the Bay of Seine. https://doi.org/10.1594/PANGAEA.830140
  2. Nizou, J; Demory, F (2015): Low-field magnetic susceptibility of the Bay of Seine seafloor dried grab samples at t0 (i.e. from June to September 2011), t1 (i.e. in March 2013), t2 (i.e. in June 2013) and t3 (i.e. in September 2013). https://doi.org/10.1594/PANGAEA.830175
  3. Nizou, J; Demory, F (2015): Frequency dependant susceptibility of dried grab samples from the navigation channel and the Bay of Seine. https://doi.org/10.1594/PANGAEA.832049
  4. Nizou, J; Demory, F (2015): Low-field magnetic susceptibility and magnetic parameters of the navigation channel dried grab samples. https://doi.org/10.1594/PANGAEA.830269
  5. Nizou, J; Demory, F (2015): Magnetic parameters of the Bay of Seine seafloor dried grab samples at t0 (i.e. from June to September 2011), t1 (i.e. in March 2013), t2 (i.e. in June 2013) and t3 (i.e. in September 2013). https://doi.org/10.1594/PANGAEA.830268
  6. Nizou, J; Demory, F (2015): Low-field magnetic susceptibility of wet vs dried replica samples randomly picked from the grab samples from the Bay of Seine seafloor at t0 (i.e. from June to September 2011) and from the navigation channel. https://doi.org/10.1594/PANGAEA.830208