摘要
不同来源的ＣＯ＿２，有着不同的δ^（１３）Ｃ值，因而造成了不同的洞穴化学沉积物δ^（１３）Ｃ值。因此，通过洞穴化学沉积物δ^（１３）Ｃ值的测定，可反演出洞穴化学沉积物形成时的环境；再配合放射性同位素测龄和δ^（１８）Ｏ测温，则有可能重现一个地区的环境变迁史。
Iso to pic study of speleothems is a very important way for reconstructing palaeo-envi-ro nment,A lot of results have been obtained in the radioactive isotopic dating and theapplication of δ￣(18)O to temperature measurement.The study and the theoretical analysisshow that CO_2 from different sources have different δ￣(13)C, and as a resuIt, the environmentwhen speleothems formed, could be deciphered by measureing their δ￣(13)C, Combining δ￣(13)Cwith radioactive isotopic dating and δ￣(18)O -temperature investigation,we can recomtructthe environmental change history in an area. The case reported in the paper suggests thepossibility and the feasibility of the application.
出处
《中国岩溶》
CAS
CSCD
北大核心
1994年第1期17-24,共8页
Carsologica Sinica
关键词
环境
洞穴
化学沉积物
碳同位素
speleothems,isotopes of carbon and oxygen,environmental change,sam-pling condition
