内蒙古伊克昭盟盐湖最近23ka古气候波动模式的研究

根据对内蒙古伊盟地区的５个碱湖中的６个钻孔岩心系统的１４Ｃ、氧碳稳定同位素、微量元素、相关元素比值、磁化率、ｐＨ值、有机碳（ＯＣ）、总碳（ＴＯ）、二氧化碳（ＣＯ２）、化学分析等的研究，编制出一个最能代表该地区气候演变规律的２３ｋａ以来的百年级气候变化曲线。依据此曲线，划分出１１个气候期，有的气候期还进一步划分出若干气候亚期。对比表明，该地区的气候变化特点与全球古气候波动模式是相一致的。

A MODEL FOR PALAOCLIMATIC FLUCTUATION IN THE PAST 23 THOUSAND YEARS EXEMPLFICTION OF SALINE LAKES IN YIKEZHAO LEAGUE OF INNER MONGOLIA

Abstract In the research, testing and examining the complete drilling cores from six holes of five saline Lakes in Yikezhao League of inner Mongolia was carried out using a large number of testing methods such as O and C isotopes, trace elements,interrelative elements, magnetic susceptibility, pH value, OC, TC, CO2, and various chemical analyst in-order to draw a synthtic curve of climatic fluctuation for the past 23 ha. According to the synthtic cruve, altogether 11 climatic periodes were recognized as these : (1)mild and arid period (23-20. 7 kaB. P. ). (2) cold and arid period (20. 7-14. 5 kaB. P. ). (3) cold and arid to warm and damp transition peaing (14. 5--10. 8 hall. P. ). (4) cold and damp stage between 10. 8 -- 10. 5kaB. P. (5) moderately warm and moist Period (10. 5-- 9. 26 kaB. P. ). (6) warm and moist period (9. 26 -- 7. 56 kaB. P. ). (7) warm and arid Period (7. 56 -- 4 kaB. P. ). (8) suboble climatlic Period (4 -- 2. 3 kaB. P. ), a warm, arid and saly moist climate. (9) mild and moist Period (2. 3-- 1. 5 kaB. P. ). (10) warm and arid period (1. 5--0. 88 kaB. P. ). (11) cool (cold) and moist period, 0. 88 hall. P. to the present. Comparative researches on all of 11 climaticveriods demonstrate that the climate hat ben fluctuating as much in Yikezhao lake region as in the world since 23 thousand years ago.