中国海南省中和镇古城墙砖的热释光测年研究

发布时间：2019-05-16 18:22

【摘要】：采用热释光前剂量饱和指数法对海南省中和镇的8件古城门墙砖样品进行了年代测定研究。由于该地区离海近,粘土中的含沙量非常高,古人在烧制砖时,采用这种粘土作为制砖的原料。烧造时的温度相对高于其它地方烧制的砖。其中4件砖样内部呈灰色,3件砖样内部呈红色,其中1件砖样断面为外围灰色,内部红色。在应用高温细颗粒方法测定这批砖样的年代时,发现样品的高温热释光灵敏度非常差,且不规则,没有"坪曲线",因而无法得出这些古代城门墙砖的具体年代。后采用热释光前剂量饱和指数方法对古砖样品进行了古剂量测定,发现这些样品具有较好的热释光前剂量效应,且样品的热释光灵敏度较高,得到的古剂量具有很好的重复性。热释光测年结果表明,No.2、No.3、No.6、No.8样品的热释光年代分别为:距今590年、575年、530年和580年,为明代早期烧制;No.1、No.4、No.7样品的热释光年代分别为:距今410年、345年和375年,为明代中晚期烧制;No.5样品的年代为距今140年,为清代晚期。经考古人员现场考证,认为No.5样品所处位置存在火烧痕迹。这个火烧时间应该在中国清代晚期,即热释光测定年代。
[Abstract]:The chronological determination of 8 ancient city door wall brick samples from Zhonghe Town, Hainan Province was studied by means of pre-thermoluminescence dose saturation index method. Because the area is close to the sea and the sediment content in clay is very high, the ancients used this kind of clay as raw material for brick making when firing bricks. The temperature of firing is relatively higher than that of bricks fired elsewhere. Among them, 4 brick samples are gray inside and 3 brick samples are red inside, of which 1 brick sample section is peripheral gray and internal red. When the high temperature fine particle method is used to determine the age of these brick samples, it is found that the high temperature thermoluminescence sensitivity of the samples is very poor and irregular, and there is no "flat curve", so it is impossible to obtain the specific age of these ancient Chengmen wall bricks. After that, the ancient dose of ancient brick samples was determined by the method of pre-thermoluminescence dose saturation index. It was found that these samples had good pre-thermoluminescence dose effect, and the thermoluminescence sensitivity of the samples was high, and the ancient dose obtained had good reproducibility. The results of thermoluminescence dating show that the thermoluminescence ages of No.2,No.3,No.6,No.8 samples are 590 years ago, 575 years, 530 years and 580 years ago, respectively, which are fired in the early Ming Dynasty. The thermoluminescence ages of No.1,No.4,No.7 samples were 410 years ago, 345 years and 375 years ago, respectively, which were made in the middle and late Ming Dynasty, and the No.5 samples were produced in the late Qing Dynasty. Through the site textual research of archaeologists, it is considered that there are fire marks in the location of No.5 samples. This burning time should be in the late Qing Dynasty, that is, thermoluminescence dating.
【作者单位】：上海博物馆文物保护与考古科学实验室;
【基金】：上海博物馆科研课题经费资助(2012001) 上海市科委科研计划项目课题资助(13231203000)
【分类号】：K878.3

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