珊瑚中微量铀的ID-ICP-MS高精度测定及其在珊瑚U/Ca温度计研究中的应用  

ANALYSES OF TRACE URANIUM OF CORAL SAMPLES BY ID-ICP-MS METHOD AND APPLICATIONS TO HIGH RESOLUTION U/Ca THERMOMETER

作　　者：韦刚健[1] 李献华[1] 刘海臣[1] 孙敏[2] 

机构地区：[1]中国科学院广州地球化学研究所,广州510640 [2]香港大学地球科学系

出　　处：《地球化学》1998年第2期125-131,共7页Geochimica

基　　金：中国科学院院长基金!KJ95-321;中国科学院留学人员基金!941101

摘　　要：建立了同位素稀释技术与ICP-MS相结合的ID-ICP-MS分析方法，成功测量了取自南海北部的滨珊瑚样品中的微量铀，获得0．5％左右的精度。并以此建立南海北部近岸海域的珊瑚U／Ca温度计，其温度精度可达±0．5℃。ID-ICP-MS, an analytical method that combines isotope dilution technique and ICP-MS method had been developed in our laboratory. Trace uranium of the coral samples from the northern area of the South China Sea had been measured to an accuracy of 0.5%. Depended on these results, a high resolution coral U/Ca thermometer for thes area was established. Monthly average SSTs with a precision of ±0.5℃ were attainable by this U/Ca thermometer.

关 键 词：ID-ICP-MS 珊瑚 铀/钙温度计 铀 

分 类 号：P736.4[天文地球—海洋地质]