DATING OF QUATERNARY SEDIMENTS BY LUMINESCENCE TECHNIQUE

1996年：用石英和长石粗颗粒和细颗粒样品研究了下列光释光特性：（1）光学沥滤：来自小川原湖的细颗粒样品在6000 Lx太阳光下暴露3分钟后，光释光强度为初始强度的25%;（2）光释光强度的温度依赖性：光释光强度随温度变化很强，但在90 ℃以上不稳定。(3)用514 nm和860 nm光激发的光释光强度;烟石英除514 nm光外还发射860 nm光释光;（4）光释光后的热释光;光释光后的热释光强度足以用于测年。（1）在50 ℃、24小时贮存条件下漂白的OSL不稳定组分与在160 ℃左右产生TL的电子中心有关，（2）在高温区，石英OSL的剂量依赖性与TL不同;（3）OSL的剂量依赖性不一定是线性的;（4）514 nm和860 nm激发的OSL的年龄不同。上述结果是根据湖泊沉积物（小川原湖）和旧石器时代遗址（Sodehara，富山，Harase-kasahari，Ustinovka等）的沉积物数据得出的。Ustinovka站点获得的OSL年龄为站点III第三层7300年，站点III第四层10050年，站点VI第四层18600年。

In 1996 : The following OSL properties were examined using quartz and feldspar course grains and fine grain samples ;(1) Optical nleaching ; OSL intensity is 25% of initial intensity after 3-min exposure to 6000Lx sun light for fine grain sample from the Lake Ogawara,(2) Temperature dependence of OSL intensity ; OSL intensity is intense with temperature, but unstable at the temperature higher than 90ﾟC.(3) Intensity of OSL stimulated by 514nm and 860nm lights ; smoky quarts emit OSL by 860nm besides 514nm lights,(4) TL after OSL measurement ; TL intensity after OSL measurements is strong enough to be applied for dating.In 1997 : The following supplementary tests were made :(1) Unstable fraction of OSL which is bleached by 50ﾟC,24h storage is related to an electron center which gives TL at about 160ﾟC,(2) Dose dependence of quartz OSL differs from that of TL at high temperature region,(3) Dose dependence of OSL is not necessarily linear,(4) OSLs by 514 nm and 860nm excitation did not give the same ages. Above results were obtained from the data for lake sediment (Lake Ogawara) and sediments from Paleolithic sites (Sodehara, Toyama, Harase-kasahari, Ustinovka ets.).The OSL age obtained for Ustinovka site are 7300 year for the siteIII 3rd layr, 10050 year for the siteIII 4th layr and 18600 year for the site VI 4th layr.