DATING OF QUATERNARY SEDIMENTS BY LUMINESCENCE TECHNIQUE

1996年：使用石英和长石层粒和细粒样品检测了以下OSL特性；(1)光学浸出；小原湖细粒样品在6000Lx阳光照射3 min后，光释光强度为初始光释光强度的25%。(2)光释光强度的温度依赖性；光释光强度随温度升高而增强，但在高于90ºC时不稳定。(3) 514nm和860nm光刺激下OSL的强度；(4)光致发光量测定后的光致发光量；光释光测量后的释光强度足以用于测年。1997年：补充进行了以下试验：(1)50c脱色24h的硅酸盐不稳定组分与一个电子中心有关，该电子中心在160 C左右产生TL；(2)石英硅酸盐在高温区域的剂量依赖性与TL不同；(3)硅酸盐的剂量依赖性不一定是线性的；(4)514 nm和860nm激发的硅酸盐的年龄不相同。上述结果来自湖泊沉积物（小原湖）和旧石器时代遗址沉积物（Sodehara、Toyama、Harase-kasahari、Ustinovka等）的数据。Ustinovka站点的OSL年龄为第3层7300年，第4层10050年，第6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.