Nizou, Jean; Demory, François (2015): Low-field magnetic susceptibility and magnetic parameters of the navigation channel dried grab samples [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.830269, In supplement to: Nizou, Jean; Demory, François; 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, https://doi.org/10.1016/j.crte.2015.02.005
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Coverage:
Median Latitude: 49.435493 * Median Longitude: 0.184483 * South-bound Latitude: 49.431538 * West-bound Longitude: 0.073266 * North-bound Latitude: 49.439447 * East-bound Longitude: 0.295701
Event(s):
Comment:
Low-field magnetic susceptibility of every sample was measured with an MFK1 susceptibilimeter (AGICO; K_LF ). The obtained value was normalized by the weight of the sample to determine the specific low-field magnetic susceptibility, X_LF . Determination of Anhysteretic Remanent Magnetization (ARM), Saturation Isothermal Remanent Magnetization (SIRM) and Isothermal Remanent Magnetization (IRM) was performed with a superconducting rock magnetometer SRM760R (2G enterprises). The ARM is an artificial magnetization gained in an alternating magnetic field of 100 mT superimposed on a steady field of 50 µT, which is comparable to the strength of the geomagnetic field. The ARM is afterward subject to demagnetization at 30 mT (ARM_30 ). The SIRM was acquired at 3 T and the IRM at 0.3 T in the opposite direction using a pulse magnetizer MMPM9 (Magnetic Measurements ltd). The S-ratio was calculated after the formula 0.5(1-IRM/SIRM) and allows for an estimation of the relative abundance of high coercivity minerals. TheS-ratio comesclose to 1when low-coercive mineralssuch a as magnetite dominate the signal, and decreaseswith increasing amount of high-coercive mineralssuch as hematite (Bloemendal et al., 1992).The Hard Isothermal Remanent Magnetization (HIRM) was calculated after the formula (SIRM-IRM)/2 and allows for an estimation of the absolute concentration of high coercivity minerals (e.g. hematite).ARM/SIRM is used as an estimator of the relative magnetic grain size. ARM_30 /ARM is also used as a magnetic grain-size estimator since samples display a constant mineralogy.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Nizou, Jean | |||
| 3 | Dry mass | Dry m | g | Nizou, Jean | ||
| 4 | Magnetic susceptibility, volume | kappa | 10-6 SI | Nizou, Jean | Susceptibilimeter, MFK1 (AGICO; K_LF) | Low-field |
| 5 | Susceptibility, specific, low-field mass-normalized | chi_lf | 10-9 m3/kg | Nizou, Jean | Susceptibilimeter, MFK1 (AGICO; K_LF) | |
| 6 | Anhysteretic Remanent Magnetization | ARM | 10-3 Am2 | Nizou, Jean | Superconducting rock magnetometer SRM760R (2G enterprises) | |
| 7 | Anhysteretic Remanent Magnetization | ARM | 10-3 Am2 | Nizou, Jean | Superconducting rock magnetometer SRM760R (2G enterprises) | ARM30 |
| 8 | Saturation isothermal remanent magnetization | SIRM | 10-3 A m2 | Nizou, Jean | Magnetometer SRM760R (2G enterprises); pulse magnetizer MMPM9 | 3T |
| 9 | Isothermal Remanent Magnetization | IRM | 10-3 Am2 | Nizou, Jean | Magnetometer SRM760R (2G enterprises); pulse magnetizer MMPM9 | -0.3T |
| 10 | Anhysteretic remanent magnetization, Intensity, per unit mass | Inten ARM | 10-6 A*m2/kg | Nizou, Jean | ||
| 11 | Anhysteretic remanent magnetization, Intensity, per unit mass | Inten ARM | 10-6 A*m2/kg | Nizou, Jean | ARM30 | |
| 12 | Saturation isothermal remanent magnetization | SIRM | 10-6 A m2/kg | Nizou, Jean | SIRM 3T | |
| 13 | Isothermal remanent magnetization, Intensity, per unit mass | Inten IRM | 10-6 A*m2/kg | Nizou, Jean | IRM-0.3T | |
| 14 | S-ratio (hematite/magnetite) | S-r | Nizou, Jean | |||
| 15 | Hard isothermal remanent magnetization, Intensity, per unit mass | Inten HIRM | 10-6 A*m2/kg | Nizou, Jean | ||
| 16 | ARM/ARM | ARM/ARM | Nizou, Jean | ARM30/ARM | ||
| 17 | Anhysteretic remanent magnetization/saturation isothermal remanent magnetization ratio | ARM/SIRM | Nizou, Jean |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
160 data points
Data
| 1 Event | 2 Sample label | 3 Dry m [g] | 4 kappa [10-6 SI] (Low-field, Susceptibilimeter,...) | 5 chi_lf [10-9 m3/kg] (Susceptibilimeter, MFK1 (AGIC...) | 6 ARM [10-3 Am2] (Superconducting rock magnetom...) | 7 ARM [10-3 Am2] (ARM30, Superconducting rock m...) | 8 SIRM [10-3 A m2] (3T, Magnetometer SRM760R (2G ...) | 9 IRM [10-3 Am2] (-0.3T, Magnetometer SRM760R (...) | 10 Inten ARM [10-6 A*m2/kg] | 11 Inten ARM [10-6 A*m2/kg] (ARM30) | 12 SIRM [10-6 A m2/kg] (SIRM 3T) | 13 Inten IRM [10-6 A*m2/kg] (IRM-0.3T) | 14 S-r | 15 Inten HIRM [10-6 A*m2/kg] | 16 ARM/ARM (ARM30/ARM) | 17 ARM/SIRM |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bay_of_Seine_Brèche | Brèche | 9.3654 | 21.68 | 23.14903795 | 4.070E-5 | 1.480E-5 | 0.002 | -0.002 | 4.340 | 1.590 | 216.0 | -170.00 | 0.892985745 | 23.200 | 0.365030976 | 0.020064125 |
| Bay_of_Seine_Brèche | Brèche | 9.9911 | 59.88 | 59.93334067 | 3.150E-5 | 9.910E-6 | 0.005 | -0.003 | 3.150 | 0.992 | 455.0 | -305.00 | 0.835698258 | 74.800 | 0.314486545 | 0.006932418 |
| Bay_of_Seine_Brèche | Brèche | 9.4200 | 56.57 | 60.05307856 | 1.490E-4 | 5.500E-5 | 0.006 | -0.005 | 15.800 | 5.840 | 630.0 | -582.00 | 0.961660858 | 24.200 | 0.369618977 | 0.025055985 |
| Bay_of_Seine_Brèche | Brèche | 9.2554 | 40.38 | 43.62858439 | 4.650E-5 | 1.650E-5 | 0.003 | -0.003 | 5.020 | 1.790 | 360.0 | -302.00 | 0.919466611 | 29.000 | 0.355833764 | 0.013946121 |
| Bay_of_Seine_Brèche | Brèche | 11.2362 | 43.88 | 39.05234866 | 5.270E-5 | 1.880E-5 | 0.003 | -0.003 | 4.690 | 1.680 | 282.0 | -240.00 | 0.925903146 | 20.900 | 0.357325136 | 0.016648363 |
| Bay_of_Seine_Engainement | Engainement | 7.3487 | 90.32 | 122.90609220 | 2.940E-4 | 1.100E-4 | 0.010 | -0.009 | 40.000 | 14.900 | 1300.0 | -1230.00 | 0.972003550 | 36.500 | 0.372802992 | 0.030711004 |
| Bay_of_Seine_Engainement | Engainement | 7.5357 | 71.16 | 94.43051077 | 1.910E-4 | 7.120E-5 | 0.007 | -0.007 | 25.300 | 9.450 | 934.0 | -868.00 | 0.964588128 | 33.100 | 0.373569068 | 0.027080669 |
| Bay_of_Seine_Engainement | Engainement | 10.1854 | 24.86 | 24.40748522 | 2.580E-5 | 7.830E-6 | 0.002 | -0.002 | 2.540 | 0.768 | 207.0 | -157.00 | 0.880188052 | 24.800 | 0.303035348 | 0.012265647 |
| Bay_of_Seine_Engainement | Engainement | 9.3390 | 72.57 | 77.70639255 | 1.830E-4 | 6.740E-5 | 0.008 | -0.007 | 19.600 | 7.220 | 813.0 | -729.00 | 0.948260646 | 42.100 | 0.368608467 | 0.024080928 |
| Bay_of_Seine_Engainement | Engainement | 9.0640 | 89.78 | 99.05119153 | 2.320E-4 | 8.400E-5 | 0.009 | -0.008 | 25.600 | 9.270 | 972.0 | -886.00 | 0.955520547 | 43.200 | 0.362599137 | 0.026297449 |