摘要
本文根据灌阳县响水洞的成洞地质条件、生态环境以及洞穴的组成等 ,论述了洞穴的形成、发育过程。通过对响水洞 1号石笋的铀系测年 ,碳氧同位素及沉积 (间断 )纹层分析 ,获得了距今 4 4.0～ 3 .1ka高分辨率古气候演变信息。反映 4 4.0ka以来区内经历了严寒 (晚大理冰期 )、冰期后干冷和温热 (间夹短暂的冷期 )等气候变化 ,为确定响水洞的形成时代和环境提供了科学依据。
The development of the cave is discussed in terms of the geological condition, ecologic environment and composition of the cave in this paper. The high\|resolution information on paleoclimatic change from the character of sedimentary (break) laminae, U\|series dating and carbon\|oxygen isotopic analyses of the No.1 stalagmite in the Xianshui cave, Guanyang County. That reflects a climatic change from cold climate (the Late Dali glacial period), through post\|glaciation dry\|cold period (around the Younger Dryas short glacial period) to warm and humid\|hot climate (intercalated with cold climate of short duration) since 44 ka B.P. in the area.\;
出处
《地质地球化学》
CSCD
北大核心
2000年第1期34-40,共7页
Geology-Geochemistry
基金
国家自然科学基金!(编号 4963 2 10 0 )
国土资源部资助项目!(编号9501104)
关键词
形成环境
石笋测年
同位素
古气候
灌阳响水洞
stalagmite
U\|series age
isotope
paleoclimate
Xianshui cave
Guanyang
