ESR dating of fluvial sediments using Ge center in quartz

Ye, Yuguang; He, Jie; Juncheng, Gao

doi:10.1007/bf02664281

Cited by 4 publications

(2 citation statements)

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“…Then the samples were thoroughly washed in water and dried at 40°C. Finally, any magnetic mineral in these samples was removed by a magnetic separator [4]. ESR spectra of the samples were measured with the ECS 106 ESR spectrometer (Bruker Co., Germany) at room temperature under the following measurement conditions: X-band; microwave power at 0.1 mW; center magnetic field, 348 mT; sweep range, 5 mT; modulation amplitude, 0.1 mT; conversion time, 5.12 ms; and time constant, 40.96 ms [5].…”

Section: Experimental Methods and Resultsmentioning

confidence: 99%

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Thermodynamical behavior of E′ centers in quartz from sediments: Potential for paleothermometry and geochronometry

Chen

et al. 2001

Appl. Magn. Reson.

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The thermodynamical behaviors of E' centers in 8 quartz samples from core XJ33-2-1 recovered in the Zhujiang Mouth Basin were measured by electron spin resonance (ESR) technique. The E' ESR spectral intensity of samples before any laboratory treatment was measured and expressed as I. The samples were then annealed at 300°C or 350°C for 60 min. The E' ESR spectral intensity measured after this procedure is expressed as I 2 . The ratios of I, to 12 for the samples increase with the sample depth (from 320 to 3972 m), showing that there is a correlation between this ratio and the storage temperature of samples. Therefore the ratio of ' "2 can be used as an ESR paleothermometer. Besides the temperature, we must take into account the period of time for which the samples have been buried since their deposition, because we find that the ratios 'I"2 (from 0.293 to 0.941) are closely related to the sediment ages (from 1.5 to 27.5 Ma), with a correlation coefficient of 0.98 or 0.99 obtained by linear or exponential regression, respectively. This relation can be explained by the increase of E' center concentration in quartz samples with the sedimentation age.

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Section: Experimental Methods and Resultsmentioning

confidence: 99%

“…4 shows the relationship between the 1,42 and sedimentation ages and demonstrates a strongly Plot of the measured 'l "2 ratio vs. sedimentation ages.…”

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confidence: 99%