甘肃省徐家城旧石器遗址的年代  

A Report on Dating of the Xujiacheng Paleolithic Site in Gansu Province,North China

作　　者：李锋[1] 陈福友[1] 高星[1] 刘德成[1] 王辉[2] 张东菊[3] 

机构地区：[1]中国科学院古脊椎动物与古人类研究所,中国科学院脊椎动物演化与人类起源重点实验室,北京100044 [2]甘肃省文物考古研究所,兰州730050 [3]兰州大学西部环境与气候变化研究院,兰州730000

出　　处：《人类学学报》2013年第4期432-440,共9页Acta Anthropologica Sinica

基　　金：国家自然科学基金(41272032);中国科学院战略性先导科技专项(XDA05130202);科技部科技基础性工作专项(2007FY110200)资助

摘　　要：庄浪县徐家城遗址是甘肃省新发现的含丰富旧石器文化遗物的遗址，主要埋藏于水洛河第二级阶地上覆的马兰黄土中。AMS^14C测年及气候事件对比相结合的综合年代研究显示，遗址主要文化层时代集中在距今4．6～2．3万年间，属于晚更新世晚期。遗址所在的陇西盆地发现近50处晚更新世旧石器遗址，测年、黄土地层学等的综合年代学研究利于建立该地区晚更新世完整的年代学框架，为我们进一步讨论晚更新世人类行为演化、人类行为与环境变化的互动等重要学术问题提供了基础。The Xujiacheng site, buried in the Malan Loess overlying the second terrace of the Shuiluo River in Zhuanglang County, Gansu Province, is a significant Paleolithic site yielding plenty of archaeological materials. AMS^14C dating and climatic comparisons with other sites indicate that the entire suite of assemblages date roughly from 46,000 to 25,000 calibrated radiocarbon years BP. Site formation processes such as sediment movement and trampling in relation to the stratigraphic position of cultural materials are important to understand when dating multi-level sites such as Xujiacheng. The AMS^14C method was used to date this site. The four cultural layers （4A, 4B, 4C and 5） provide the following dates： （22,925±426） - （28,160±342）, （41,488±378） - （42,822±451）, （45,167±524） - （46,222±714）, and older than 46,222±714, respectively. Comparison with climatic events as indicated by magnetic susceptibility at Xujiacheng, Zhuanglang 5, and the Dadiwan site shows that they have similar ages of the same events （such as H4 and A4） that were well dated in Hulu Cave record. With these agreements, there is more confidence in our AMS^14C dates for the Xujiacheng site. A complete high-resolution chronology is vital for accurate archaeological dating, and the Longxi Basin where the Xujiacheng site is located in is an ideal area for using different dating methods and the loess-paleosol sequence analysis. Future Paleolithic work in this area with solid control of chronology will make a significant contribution to our understanding of the interaction between human behavior and environmental change in Late Pleistocene in North China.

关 键 词：徐家城遗址 旧石器时代 AMS^14C测年 气候事件对比 年代框架 

分 类 号：K871.11[历史地理—考古学及博物馆学]