中国东都喀斯特洞穴沉积物铀系年代  

THE U-SERIES AGES OF SPELEOTHEM OF KARST CAVES IN THE EAST OF CHINA

作　　者：赵树森[1] 刘明林[1] 乔广生[1] 

机构地区：[1]中国科学院地质研究所

出　　处：《中国岩溶》1990年第3期279-288,共10页Carsologica Sinica

摘　　要：本文报导采自中国东部喀斯特地区128个洞穴沉积物的^(230)Th/^(234)U年代测定结果。最年轻年龄为4300年,最老年龄大于35万年。 中国东部洞穴沉积物有三个发育时期,它们是距今4000～13,000年,35,000～60.000年和75,000～12万年;也有两个不发育期。是距今15,000～35,000年和65,000～75,000年。这五个时期分别与V_(■)深海岩心同位素记录的第一、第三、第五暖期和第二、第四冷期相对应。In this paper results of U- series dating of speleothem from the east of China are presented. The 128 data presented here show that the ages of the youngest and oldest samples are of 4300 years and more than 350 ka B. P.respectively. In the periods of 4-13 ka, 35-60 ka and 75-120 ka B. P. abundant speleothem growth can be found in east China. However, in the periods of 15-35 ka and 65-75 ka B.P. the speleothem were less developed in east China. They may be correlated with the 1st, 3rd. 5th warm periods and 2nd, 4th glacial stages recorded by isotope data of deep sea drilling cores V28-239.

关 键 词：岩溶 洞穴 沉积物 铀系 年代 

分 类 号：P642.25[天文地球—工程地质学]