广西灌阳县观音阁响水洞的形成环境及1号石笋的古气候信息  

THE FORMATION ENVIRONMENT AND PALEOCLIMATIC SIGNIFICANCE OF NO.1 STALAGMITE IN XIANSHUI CAVE, GUANYANG COUNTY, GUANGXI

作　　者：张美良[1] 林玉石[1] 覃嘉铭[1] 李彬[1] 

机构地区：[1]国土资源部岩溶地质研究所,岩溶动力学开放研究实验室,桂林541004

出　　处：《地质地球化学》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)

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.\;

关 键 词：形成环境 石笋测年 同位素 古气候 灌阳响水洞 

分 类 号：P532[天文地球—古生物学与地层学] P597[天文地球—地质学]