贵州水城硝灰洞的铀系年龄

U-SERIES AGE OF SPELEOTHEM SAMPLES FROM XIAOHUI CAVE IN SHUICHENG, GUIZHOU PROVINCE

本文报道了古人类遗址贵州水城硝灰洞钟乳石样的铀系年龄。溶洞表层钙板为11(范围10～13)万年,位于笫3堆积层下都的一小石笋为23(?)万年,含化石及文化遗物的堆积层应在13～23万年间形成,因此应属中更新世的晚期,水域人应属早期智人,“锐棱砸击文化”应起源于旧石器时代早期。硝灰洞岩溶发育期与深海钻孔δ(?)O曲线良好吻合,说明了全球性气候变迁对该地的影响。

Xiaohui cave,25km north west of the Shuicheng city in Guizhou Province, is considered as the native place of a special technique for producing stone tools named 'Sharp Edge Bi-polar Method'. The U-series age of the cave's capping calcareous layer is 110( range 100- 130) ka B.P., and of a small stalagmite in lower part of the third layer is 232 ka B.P. .The sediments containing fossils and cultural relics should be formed between 130 and 230 ka B.P .belong thus to a late period of Middle Pleistocene.Shuicheng Man should be therefore classified as early Homo Sapiens, and his industry to lower paleolithic period The periods it speleothem formation in this cave coincide well with the marine oxygen isotope stages, indicating the influence of the global cyclical climate changes to this subtropical area with an altitude of about 1700 metres above sea level.