石笋高精度高分辨率年代学和古气候研究

STUDY ON THE HIGH-RESOLUTION CHRONOLOGY OF STALAGMITES AND PALEOCLIMATE IMPLICATIONS IN CHINA

古气候变化突变事件的发现和对未来环境变化的预测 ,提出了取得高分辨率古环境记录的要求。本文介绍了中国洞穴石笋年代学和古气候最新研究的进展以及目前我们用MAT - 2 6 2质谱仪对洞穴石笋的TIMS铀系定年法对贵州荔波董歌洞、龙泉洞、衙门洞、贵州都匀七星洞洞穴次生碳酸盐石笋进行年代学研究的一些成果。

The discovery of abrupt climate changes and the prediction of environmental changes in the future have raised an urgent request for high-resolution paleoenvironmental records. We have introduced the archaeology and paleoclimate of stalagmites in China in this paper. So far, with the high-sensitive and high-precision U-Th disequilibrium method, stalagmites dating has been conducted by thermal ionization mass spectrometry(TIMS) (MAT-262 mass spectrometer). The stalagmites from the Dongge, Longquan, Yamen caves at Libo, Guizhou and the Qixin cave at Duyun, Guizhou.