Samples dated with ESR

Note

This section was designed by M. Bartz.

Age

Age is Older/Equal/Younger than - Select one option among those listed.

Marine Isotopic Stage - Select a MIS from the list. Add new MIS definitions if necessary. If the MIS is already present in the list but a different definition is needed, use the text box below (Comments/details on MIS designation).

Reported age (ka) - Reported age.

Reported age uncertainty (±2-sigma) (ka) - Reported age uncertainty. If the uncertainty level is not reported, note it in the textbox below. If reported to ±1-sigma level, transform to ±2-sigma.

Comments/details on MIS designation - Provide comments or details on the designation above.

Dose estimation

Mineral type - Designate from which mineral the ESR intensity was measured.

Grain size (µm) - Designate which grain size was measured, e.g. 100-200 µm.

Aliquot size (mg) - Designate which aliquot size was used: multi-grain or single-grain aliquots. If multi-grain aliquots are used, provide the aliquot weight (e.g. 100 mg).

Measurement protocol - Provide information on the used measurement protocol, e.g. single aliquot regenerative dose (SAR), single aliquot additive dose (SAAD), multiple aliquot additive dose (MAAD).

ESR spectrometre type - Designate the ESR spectrometre type (e.g. Bruker X-band ELEXSYS E500). Provide information on the variable temperature unit (VTU) and resonator.

Measurement temperature (K) - Designate at which temperature the ESR intensity was measured: Room temperature or low temperature.

Acquistion parameters - Designate the experimental conditions: Frequency, microwave power, points resolution, sweep width, modulation frequency, modulation amplitude, conversion time, time constant.

ESR signal - Provide information on the g-factor and/or paramagnetic center.

Number of scans - Designate which centre was targeted, e.g. Al centre in quartz.

Number of repeated measurements - Designate which centre was targeted, e.g. Al centre in quartz.

Number of rotations in the cavity - Designate how many rotations in the cavity were used.

Evaluation of the ESR signal intensity - Designate how ESR intensities were evaluated, e.g. peak-to-peak measurements, peak-to-baseline, deconvolution (provide information on the used g-factors).

Correction of the ESR intensities - Designate whether ESR intensities were corrected, e.g. by sample weight, temperature correction factors, receiver gain, number of scans.

Bleaching coefficient (%) - Provide information on beaching conditions, e.g. for the Al centre in quartz.

Note

This field appears only if “Quartz” is selected as material

Fitting program and error calculation - Designate which software was used to fit the dose response curve.

Fitting function - Designate the fitting function that was used for dose calculation, e.g. single saturating exponential (SSE) function.

Data weighting used for fitting - Provide information on data weighting, e.g. equal weights or weighting by the inverse of the squared ESR intensity (1/I²).

Equivalent dose estimate (Gy) / Equivalent dose estimate undertainty (±1-sigma) (Gy)

Dose rates

Depth (m) - Depth below surface.

Technique - Provide information on techniques that determine radioelement concentrations or total alpha, beta or gamma dose rate values.

Dose rate uncertainty type - Insert uncertainty, e.g. 1-sigma or 2-sigma or N/A.

Dose rate values:

external U (ppm) / external U error (ppm)

external Th (ppm) / external Th error (ppm)

external K (%) / external K error (%)

external Rb (ppm) / external Rb error (ppm)

External dose rate (Gy/ka) / External dose rate uncertainty (Gy/ka)

internal U (ppm) / internal U error (ppm)

internal Th (ppm) / internal Th error (ppm)

internal K (%) / internal K error (%)

internal Rb (ppm) / internal Rb error (ppm)

Internal dose rate (Gy/ka) / Internal dose rate (Gy/ka)

Alpha dose rate (Gy/ka) / Alpha dose rate error (Gy/ka)

Gamma dose rate (Gy/ka) / Gamma dose rate error (Gy/ka)

Beta dose rate (Gy/ka) / Beta dose rate error (Gy/ka)

Cosmic dose rate (Gy/ka) / Cosmic dose rate error (Gy/ka)

Water content determination method

Field water content (% of dry mass)

Water content used (%)

Water content used error (%)

Attenuation factors - Provide full reference for the attenuation factor(s) used.

Conversion factors - Provide full reference for the conversion factor(s) used.

Alpha efficiency factor - Designate which alpha efficiency factor was used (provide reference).

Etching method - Designate how the samples were etched (by e.g. HF).

Etch depth (µm) - Provide the depth of the etched surface.

Etch depth error (µm)

Total dose rate (Gy/ka) / Total dose rate uncertainty (Gy/ka)

Other details

Comments and notes - Insert here any comments or notes on the ESR analysis.