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1. 国家地震局地质研究所
2. 中国科学院西安黄土与第四纪地质开放实验室
3. 河北地质学院水文地质和工程地质系
4. 国家地震局地质研究所中国科学院西安黄土与第四纪地质开放实验室河北地质学院水文地质和工程地质系
Published:01 February 1991
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[1]卢演俦,张景昭,赵华.第四纪沉积物热释光测年中古剂量的测定方法[J].核技术,1991(02):109-113.
Lu Yanchou Zhang Jingzhao Zhao Hua. Paleodose determination methods of TL dating of the Quaternary sediments[J]. Nuclear techniques, 1991, (2): 109-113.
测定碎屑矿物沉积后吸收的古剂量是第四纪沉积物热释光测年的关键。测定古剂量的方法有三种
即部分晒退法、残余热释光法和再生热释光法。我们对黄土、风砂、河流冲积物等近百个样品中石英等碎屑矿物的古剂量测定结果初步表明:部分晒退法似乎不适用于风积物(如黄土、古沙丘砂);残余热释光法比较简便和可靠。对于较年轻的风积物尤其如此;再生热释光法工作量大
但是
对于热释光随剂量呈非线性增长的样品
则有其他两种方法不可代替的优点。
Determination of the paleodose absorbed by debris minerals in sediments after deposition is a key course for TL dating of the Quaternary sediments. Three methods
i.e. the partial bleaching
the residual and the regeneration TL method
have been widely employed for paleodose measurement. On the basis of the paleodose determinations of more than one hundred samples of loess
sand dune and alluvial deposits obtained by these methods we come to the conclusion that (1) the par-tial bleaching method seems to be unsuitable for aeolian deposits
such as loess and sand dune;(2) the residual TL method is simpler and more reliable
especially for younger aeolian deposits; and (3) although the regeneration TL method takes long time
it is a reliable way for samples with nonlinear TL growth curve.
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