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Geochemical Journal
Geochemical Journal An open access journal for geochemistry
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Evaluation of the ambient environment of mineral (gypsum(CaSO4·2H2O)) growth by ESR microscope

Tetsuji Omura, Motoji Ikeya
Geochemical Journal, Vol. 29, No. 5, P. 317-324, 1995

ABSTRACT

The distribution of two radicals (CO3- and SO2-) in natural crystalline gypsum in a bore-hole core from the Konya basin in Turkey was imaged using a home-made electron spin resonance (ESR) microscope. The high concentration of SO2- at the center of the crystal indicates that the gypsum has grown from the center to the surface. The high concentration of CO3- at the surface would be caused by the external β-rays from sediments. The distribution of impurities was also checked by electron probe X-ray microanalysis (EPMA).

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