洞穴次生化学碳酸盐沉积物-石笋的气候替代指标的意义与不确定性因素

被引:17
作者
张美良
朱晓燕
吴夏
潘谋成
阳和平
机构
[1] 中国地质科学院岩溶地质研究所岩溶动力学重点实验室
关键词
洞穴石笋; 代用指标; 环境意义; 不确定性;
D O I
10.14050/j.cnki.1672-9250.2015.02.002
中图分类号
P532 [古气候学];
学科分类号
070903 ;
摘要
洞穴次生化学碳酸盐(CaCO3)沉积物-石笋、钙华和流石,是一个具有丰富的陆地古气候信息的档案库。洞穴碳酸盐(CaCO3)-石笋古环境重建常用的代用指标有碳、氧稳定同位素、生长速度、纹层厚度和灰度、有机质荧光、微量元素等,利用多种替代指标的环境解译,增加了古气候环境重建的可靠性。本文从测年方法和石笋年代学的研究入手,对石笋的生长速度,沉积速率、纹层厚度、稳定同位素、微量元素等各代用指标指代的气候意义进行了简述,同时,也对洞穴次生化学碳酸盐(CaCO3)沉积物-石笋中各单一代用指标存在的不确定性影响因素进行了探讨。因此,我们认为洞穴动态监测可为洞穴碳酸盐(CaCO3)沉积物的各替代指标的解译提供可靠的依据,充分利用现代洞穴监测的碳酸盐(CaCO3)沉积物的各替代指标,并与现代器测气象资料进行相互对比、并用以校正,是精确或定量解释石笋气候替代指标的关键。
引用
收藏
页码:138 / 151
页数:14
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