华南师范大学学报（自然科学版）
華南師範大學學報（自然科學版）
화남사범대학학보（자연과학판）
JOURNAL OF SOUTH CHINA NORMAL UNIVERSITY （NATURAL SCIENCE EDITION）
2014年
3期
124-129
,共6页
中国沙漠%Sr 同位素比值%气候变化%地下水%阿拉善高原
中國沙漠%Sr 同位素比值%氣候變化%地下水%阿拉善高原
중국사막%Sr 동위소비치%기후변화%지하수%아랍선고원
deserts of China%Sr isotopic ratios%climate change%groundwater%Alxa Plateau
选取北方西-东向气候剖面上物质组成相似的4个沙漠（塔克拉玛干、巴丹吉林、腾格里和毛乌素），测定其地表沙酸溶物87 Sr/86 Sr 比值（质量之比）及 Ca2＋和 Sr2＋质量比.结果表明，Ca2＋和 Sr2＋质量比相关性极好，在降雨量低的塔克拉玛干沙漠中最高，向东逐渐降低，在降雨量多的毛乌素沙漠中最低.降雨量是控制阳离子浓度变化的主导因素.酸溶物87 Sr/86 Sr 比值在4个沙漠中有不同于阳离子变化的区域特征.酸溶物87 Sr/86 Sr 比值在塔克拉玛干沙漠中低于0.7100，在巴丹吉林和腾格里沙漠中大于0.7112，而在毛乌素沙漠中介于0.7100~0.7112之间.塔克拉玛干和毛乌素沙漠地表沙酸溶物87 Sr/86 Sr 比值仅受气候变化的制约.巴丹吉林和腾格里沙漠除了受气候因素影响外还受其它因素的制约，远源地下水对巴丹吉林沙漠的影响为47%，对腾格里沙漠为44%，接近气候因素的影响.
選取北方西-東嚮氣候剖麵上物質組成相似的4箇沙漠（塔剋拉瑪榦、巴丹吉林、騰格裏和毛烏素），測定其地錶沙痠溶物87 Sr/86 Sr 比值（質量之比）及 Ca2＋和 Sr2＋質量比.結果錶明，Ca2＋和 Sr2＋質量比相關性極好，在降雨量低的塔剋拉瑪榦沙漠中最高，嚮東逐漸降低，在降雨量多的毛烏素沙漠中最低.降雨量是控製暘離子濃度變化的主導因素.痠溶物87 Sr/86 Sr 比值在4箇沙漠中有不同于暘離子變化的區域特徵.痠溶物87 Sr/86 Sr 比值在塔剋拉瑪榦沙漠中低于0.7100，在巴丹吉林和騰格裏沙漠中大于0.7112，而在毛烏素沙漠中介于0.7100~0.7112之間.塔剋拉瑪榦和毛烏素沙漠地錶沙痠溶物87 Sr/86 Sr 比值僅受氣候變化的製約.巴丹吉林和騰格裏沙漠除瞭受氣候因素影響外還受其它因素的製約，遠源地下水對巴丹吉林沙漠的影響為47%，對騰格裏沙漠為44%，接近氣候因素的影響.
선취북방서-동향기후부면상물질조성상사적4개사막（탑극랍마간、파단길림、등격리화모오소），측정기지표사산용물87 Sr/86 Sr 비치（질량지비）급 Ca2＋화 Sr2＋질량비.결과표명，Ca2＋화 Sr2＋질량비상관성겁호，재강우량저적탑극랍마간사막중최고，향동축점강저，재강우량다적모오소사막중최저.강우량시공제양리자농도변화적주도인소.산용물87 Sr/86 Sr 비치재4개사막중유불동우양리자변화적구역특정.산용물87 Sr/86 Sr 비치재탑극랍마간사막중저우0.7100，재파단길림화등격리사막중대우0.7112，이재모오소사막중개우0.7100~0.7112지간.탑극랍마간화모오소사막지표사산용물87 Sr/86 Sr 비치부수기후변화적제약.파단길림화등격리사막제료수기후인소영향외환수기타인소적제약，원원지하수대파단길림사막적영향위47%，대등격리사막위44%，접근기후인소적영향.
87 Sr/ 86 Sr ratios and Ca2 + ,Sr2 + concentrations of acid soluble fractions of surface sands are measured for four deserts(Taklimakan,Badain Jaran,Tengger and Mu Us)with similar mineral and geochemical compositions in the W-E direction over North China. Ca2 + and Sr2 + concentrations have an excellent correlation,are the highest in the Taklimakan Desert with the low rainfall,decreasing eastwards,and the lowest in the Mu Us sandy land with the high rainfall. The rainfall is the main factor controlling cationic concentration. Acid soluble 87 Sr/ 86 Sr ratios have regional characteristics different from cationic change in the four deserts. Acid soluble 87 Sr/ 86 Sr ratios are low-er than 0. 71 for the Taklimakan desert,more than 0. 711 2 for the Badain Jaran and Tengger deserts,and between 0. 71 and 0. 711 2 in the Mu Us sandy land. Acid soluble 87 Sr/ 86 Sr ratios of surface sands in the Taklimakan desert and the Mu Us sandy land were only affected by climate factor. The Badain Jaran and Tengger deserts were affected not only by climate factors but also by additional factors,e. g. remote groundwater. By calculation,the effect of re-mote groundwater presents 47% on the Badain Jaran desert,44% on the Tengger desert,respectively,approaching the impact of climate factor.
