@article{oai:nichibun.repo.nii.ac.jp:00000345,
 author = {IKEYA, Motoji and OKA, Toshihide and OMURA, Tetsuji and OKAWA, Mariko and TAKENO, Setsuo},
 journal = {Nichibunken Japan review : bulletin of the International Research Center for Japanese Studies},
 month = {Jan},
 note = {Some of the natural minerals formed in arid climate give information on the paleo-climate.  A microwave spectroscopy of electron spin resonance, (ESR), which detects the concentration of accumulated defects produced by natural radiation, gives the age of a mineral.  ESR ages of gypsum (CaSO4・2H2O) from Quaternary lacustrine sediments in Konya Basin, Turkey, were estimated using the CO3-signal as a function of the depth.  The ages at 17.4 and 27.4 m were estimated to be about 37 and 62 ka and the average velocity of sedimentation from 6 to 13 m and from 17 to 16 m was determined to be about 0.4 m/ka.  The distribution of two radicals (CO3- and SO2-) in crystalline gypsum was imaged using a scanning ESR microscope developed in our laboratory.  The high concentration of SO2- at the center of the crystal indicates that the gypsum has grown from the center to the surface.  The distribution of impurities was also checked by electron probe X-ray microanalysis (EPMA).  Our scanning ESR imaging method can clarify the stripe pattern and cyclic variation of paleo-climate.},
 pages = {193--208},
 title = {<FEATURE ARTICLES: Changes in the Environment and Civilizations in Turkey and Syria>Evaluation of environment using electron spin resonance(ESR) : microscope images of gypsum(CaSO4・2H2O)Microcrystals in vorehole cores at konya basin Turkey},
 volume = {8},
 year = {1997}
}