Analytical performance:

Fully automatic acquisition of:

• split surface morphology using a simple microswitch
• magnetic susceptibility logs of (soft) sediment cores of up to 1.5 m length using a Bartington MS2E sensor.
• the optical spectrum of sediment cores using a GretagMacbeth Spectrolino. Color measurements are performed through a circular window of 4 mm diameter. Results are given as 36 spectral lines every 10 nm from 380 to 730 nm along a single trace. Together with spectral data, XYZ and L*a*b* values are stored to an ascii file (currently unavailable).
• Measuring increment: 1 mm (or larger)

Technical concept:

• N. R. Nowaczyk, M. Voigt

Software development:

• linux software (Kubuntu Linux) for data acquisition: D. Ulbricht

Applications:

• Magnetostratigraphic investigation of lake and marine sediments.

Sample types:

• split cores, u-channels, x-ray samples.

Download:

• Sample data of paleoclimatic record from Lake El'gygytgyn

Analytical performance:

• Measurement of magnetic bulk susceptibility as function of variable field strength (200 to 700 mAm-1)
• Determination of the anisotropy of magnetic susceptibility (AMS, 2. order tensor)
• Measurement of magnetic bulk susceptibility as function of low temperatures (-196°C to 0°C)
• Measurement of magnetic bulk susceptibility as function of high temperatures (20°C to 700°C)
• Operating frequency: 976Hz
• Sensitivity: 5x10-8

Applications:

• Rock magnetic investigations of terrestrial, lacustrine or marine sediment sequences; or hard rocks.

Sample types – bulk, field-dependent, AMS:

• cubes: 23x23x23 mm (maximum)
• hard rock samples (diameter: 1" = 25.4 mm; length: 22mm, maximum)
• Sample types – low- and/or high-temperature runs: ca. 100 mg of powder

Download:

• KAPPABRIDGE sample data (PDF, english)
• AMS basics (PDF, english)

Applied Physics Systems APS 520A

Analytical performance:

• Measurement of weak static magnetic fields in the Laboratory with a 3-axis fluxgate sensor, ~25x25x70mm
• Measuring range: 1 nT - 100 µT
• Compensation of ambient field for monitoring of superimposed field variations

Portable Bartington Magmeter 2 with Mag-13MC1000 3-axis fluxgate sensor

Analytical performance:

• Measurement of static magnetic fields in the Laboratory and outdoor with a 3-axis fluxgate sensor, diameter 25mm, length 203mm
• Measuring range: +/- 1000 µT

Applications (both)

• Control of the ambient field within the laboratory  and outdoor
• Checking the performance of compensation coils and magnetic shieldings

Analytical performance:

• 2G Enterprises 755 superconducting rock magnetometer. 3-axis DC-SQUID magnetometer for measurement of remnant magnetizations, noise level = 10e-6 Am-1, upper sensitivity limit = about 2-4 Am-1, depending on component, with in-line 3-axis alternating field demagnetizer, max. field = 100mT (frequently), 150mT (exceptional), automatic long-core sample handler, but mostly used for measuring sets of nine discrete samples.

Applications:

• Magnetostratigraphic, paleomagnetic and rock magnetic investigation of soft sediments and hard rocks.

Sample types:

• u-channels (20x20mm, Lmax. = 150 cm),
• soft sediments (cubes max. 23x23x23 mm),
• hard rock samples (1"diameter, Lmax. = 22mm, orientation angles).

Analytical performance:

• Measurement of static and alternating magnetic fields in the Laboratory with single axis hall probes.
• 1 axial probe
• 1 transvers probe Measuring range: 300 (+/- 0.1) µT - 30 (+/- 0.001) T.

Applications:

• Control of the ambient field within the laboratory.
• Checking of compensation coils and magnetic shieldings.
• Checking the magnetic field of demagnetization coils and electromagnets.

Analytical performance:

• Dual speed spinnermagnetometer (16.7 or 89.7 Hz) using induction coils.
• Sensitivity range = 2.4x10e-6 to 12.5x10e3 Am-1.
• Autoranging and automatic change of measuring positions.

Applications:

• Vectorial measurements of remanent magnetizations

Sample types:

• hard rock samples (diameter: 1" = 25.4 mm; length: 22mm, maximum)

Analytical performance:

• Extraction of magnetic minerals from resuspensed sediments using 10 sets of 3 extra-strong Neodymium magnets in combination with pure Iron extensions (fingers). The usable length of these 'fingers' is about 20 mm with a diameter of 8 mm. The iron fingers are protected by a teflon hose in order to enable the recovery of the collected magnetic particles from the extraction probe. Normally, a suspension is made from about 3-6 ccm of sediment dispersed in 50 ml of liquid, that is, water and/or alcohol. The extraction probe is submersed into the previously ultrasound-stirred slurry for a few minutes to hours.

Applications:

• Extraction/concentration of the magnetic phase from unconsolidated marine or lacustrine sediments for further detailed studies.

Analytical performance:

• Measurement of hysteresis curves, back field curves, and fully automatic acquisition of isothermal remnant magnetization (IRM) curves.
• Field range +- 2.2 Tesla
• A 4" electromagnet introduces a magnetic moment to the sample that is then forced to oscillate by a pair of coils producing an alternating gradient magnetic field. The oscillation of the sample, that is proportional to its magnetic moment is picked up by a piezo cristal that transforms mechanical movement into a voltage.

Applications:

• Rock magnetic investigations: magnetogranulometry
• determination of:
  • saturation magnetization - Ms
  • saturation remanence - Msr
  • coercive force - Bc
  • coercive force of remanence - Bcr
  • coercivity spektrum
  • FORC diagrams

Sample types:

• max. 50, 100, or 200 milligram samples, depending of chosen probe

Download:

• Further information about MicroMag (PDF)

Analytical performance:

• Single speed spinnermagnetometer with fluxgate sensor.
• sensitivity range = 2.0x10e-4 to 3.5x10e3 Am-1.
• manual change of measuring positions.
• short spin time = 6 secs.
• long spin time = 24 secs.

Applications:

• Paleomagnetic and rock magnetic investigation, mainly acquisition experiments of isothermal remnant magnetization.

Sample types:

• cubes max. 23x23x23 mm h
• ard rock samples (1"diameter,lmax. = 22mm, orientation angles).

Download:

• Futher information about Minispin (PDF)

Magnetic Measurements MMPM10 (upper instrument):

• total field range = 0.01 to 2.7 T (1" coil) or 10 T (0.5" coil).

2G Enterprises 660 (lower instrument):

• total field range = 0.01 to 2.7 T

Download:

• Sample data (PDF)

Analytical performance:

• Alternating field (A.F.) demagnetization of paleo- and rock magnetic samples.
• Maximum field: 270 mT
• Integrated D.C. coil for acquisition experiments of anhysteretic remnant magnetization (ARM).
• Maximum field: 1 mT

Applications:

• Magnetostratigraphic, paleomagnetic and rock magnetic investigation of soft sediments and rocks.

Sample types:

• soft sediments (cubes max. 23x23x23 mm), hard rock samples (1"diameter, lmax. = 22mm).

Magnetic Measurements Thermal Demagnetizer MMTD18 (silver box)

Specifications:

• Maximum temperature: 700°C,
• integrated D.C. coil for acquisition experiments of thermoremnant magnetization (TRM),
• single chamber for heating and cooling,
• programmable for heating and cooling sequences,1 sample boat for 18 samples.

Thermal demagnetizer ASC Scientific TD48 (black tube)

Specifications:

• Maximum temperature: 700°C,
• separated chambers for heating and cooling,
• manual setting for heating and cooling times,
• 2 sample boats for 48 samples each.

Sample types:

• hard rock samples (1"diameter, Lmax. = 22mm).
• When samples are not treated they can be stored in a 6-layer µ-metal shield.