福建宁化天鹅洞石笋晚第四纪同位素古温度研究  

A STUDY ON LATE QUATERNARY ISOTOPIC PALEOTEMPERATURE OF STALAGMITE FROM TIAN'E CAVE AT NINGHUA COUNTY,FUJIAN

作　　者：洪阿实[1] 彭子成[1] 李平[1] 陈承惠[1] 许志峰[1] 王明亮[1] 

机构地区：[1]国家海洋局第三海洋研究所,中国科学技术大学地球和空间科学系

出　　处：《地球化学》1995年第2期138-145,共8页Geochimica

基　　金：国家自然科学基金;中国科学院兰州地质研究所生物与气体地球化学国家重点实验室资助

摘　　要：应用同位素测年测温技术，得出福建宁化天鹅洞内碳酸盐堆积物的同位素古温度，在与全球深海Ｏ同位素曲线对比后得出，该地区大约在２１０－１８ｋａＢ．Ｐ．之间，经历过五次大的气温变化过程，分别相当于Ｏ同位素第６、５、４、３和２阶段。里斯冰期的结束时间估计在１５５ｋａＢ．Ｐ．，武木亚间冰期的起始时间估计在６５ｋａＢ．Ｐ．。结果表明，宁化地区晚第四纪古气候环境没有形成冰川的条件，但明显受到全球气温变化的控制。Isotopic paleotemperature was obtained for the speleothems from the Tian'e cave of Ninghua County, Fujian Province,applying isotopic dating and temperature-probing techniques based on the O'Neil's equation. The comparison of the temperature evolution curve of the speleothems with the global O-isotopic curve of deep sea foraminifera shows that the studied area has evidently experienced five times greater temperature flunctuations from about 210 ka to l8 ka B.P., which correspond to the 6th,5th, 4th, 3th and 2th stages of the oxygen isotopic variation, respectively. It is estimated that the Riss glaciation ended at about l55 ka B. P. , and the Wurm subinterglaciation began at about 65 ka B.P. The Late Quaternary paleoclimate environment in Ninghua was not suitable for the development of a glacier, and it was kept under the influence of the global temperature variation.

关 键 词：同位素 古温度 晚第四纪 石笋 天鹅洞 

分 类 号：P534.63[天文地球—第四纪地质学] P597[天文地球—古生物学与地层学]