湖泊碳酸盐氧同位素记录的古温度定量研究

Quantificational Research of Paleotemperature from Oxygen Isotope Records for Lacustrine Carbonates

中文关键词:  湖泊碳酸盐  氧同位素组成  古温度

英文关键词:Lacustrine carbonate,Oxygen isotope composition,Paleotemperature

中文摘要:

      同位素地质温度计的概念一经提出，便被应用于海洋古水温恢复。该方法被部分学者运用到湖泊领域。利用湖泊碳酸盐氧同位素记录，对古湖水温做定量研究，进而定量反演古气温。在利用湖泊碳酸盐氧同位素记录进行古温度定量研究时。需要考虑如下因素：气温对湖泊碳酸盐氧同位素值变化的影响机制；介形虫Sr／Ca与古盐度的关系；湖泊沉积碳酸盐成因及种类鉴定等等，做了相应评述。

英文摘要:

      The technique of isotopic geological thermometer was applied to paleotemperature reconstruction of sea-water since being put forward,which was subsequently introduced into lacustrine sediments.Two aspects with regards to the quantificational research of paleotemperature from oxygen isotope records for lacustrine carbonates are of much concern.One is the influencing mechanism of temperature on oxygen isotope composition,another is related to the relation between Sr/Ca of lacustrine ostracodes and paleosalinity.Further,the corresponding critique is given in this paper.