Magnetic measurements performed on sediments from the Bay of Seine seafloor (France) from 2011 to 2013
| Cobertura |
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 |
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| Data(s) |
07/05/2015
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| Resumo |
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. |
| Formato |
application/zip, 6 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.830212 doi:10.1594/PANGAEA.830212 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Relação |
Magnetic measurements performed on sediments from the Bay of Seine seafloor (France) as zip archive (2015). http://store.pangaea.de/Publications/Nizou_etal_2015/PangaeaData.zip |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Nizou, Jean; Demory, Francois; Dubrulle-Brunaud, Carole (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, doi:10.1016/j.crte.2015.02.005 |
| Palavras-Chave | #-0.3T; -0.3T, at t0; 15616Hz; 3T; 976Hz; Anhysteretic Remanent Magnetization; Anhysteretic remanent magnetization/saturation isothermal remanent magnetization ratio; ARM; ARM, Intensity, per unit mass; ARM/ARM; ARM/SIRM; ARM30; ARM30,; ARM30, at t0; ARM30, at t1; ARM30, at t2; ARM30, at t3; ARM30/ARM; ARM30/ARM, at t0; ARM30/ARM, at t1; ARM30/ARM, at t3; at t0; at t0, low-field magnetic susceptibility; at t1; at t1, low-field magnetic susceptibility; at t2; at t2, low-field magnetic susceptibility; at t3; at t3, low-field magnetic susceptibility; chi_lf; Comment; Contribution; Depth; DEPTH, sediment/rock; Dried low-field magnetic susceptibility (KLF); Dry m; Dry mass; Event; Hard-IRM, per unit mass; HIRM/mass; Inten (ARM); Inten (IRM); IRM; IRM, Intensity, per unit mass; IRM-0.3T; IRM-0.3T, at t0; IRM-0.3T, at t1; IRM-0.3T, at t2; IRM-0.3T, at t3; Isothermal Remanent Magnetization; kappa; Label; Low-field; Magnetic susceptibility; Magnetometer SRM760R (2G enterprises); pulse magnetizer MMPM9; MAGS; Sample code/label; Sampling station number; Saturation isothermal remanent magnetization; SIRM; SIRM 3T; SIRM3T, at t0; SIRM3T, at t1; SIRM3T, at t2; SIRM3T, at t3; SIRM3Tat t3; Sparamag part; S-r; S-ratio (Hematite/Magnetite); Station; Superconducting rock magnetometer SRM760R (2G enterprises); Superparamagnetic particles; Susceptibilimeter, MFK1 (AGICO; K_LF); Susceptibility, specific, low-field mass-normalized; Susceptibility, volume; Weight dry sample; Wet low-field magnetic susceptibility (KLF) |
| Tipo |
Dataset |
