【摘要】 本文综述了近10年来激光原位LA-MC-ICP-MS测定地质样品Sm-Nd同位素测试技术的最新进展,着重介绍了同质异位素干扰校正的关键技术难点及校正方案。LA-MC-ICP-MS技术对轻稀土富集矿物可以获得可靠的¹⁴⁷Sm /¹⁴⁴Nd and¹⁴³Nd /¹⁴⁴Nd值,是当前进行地质样品激光原位Sm-Nd同位素测定的主要技术,配合矿物微区U-Th-Pb年龄测定和微量元素分析,可以对矿物的成因演化提供重要的制约参数。多元同位素体系（Sr-Nd-Hf同位素、U-Th-Pb年龄和微量元素）的原位微区联合测定,低含量地质样品（小于500μg/g）和高Sm/Nd值矿物（如磷钇矿Sm/Nd远远大于1,有时甚至达到10）的Sm-Nd同位素组成的准确测定是未来LA-MC-ICP-MS激光原位Sm-Nd同位素测定的主要发展方向之一,具有广阔的应用前景。更多还原

【Abstract】 The new progresses in analytical methods of in situ Sm-Nd isotope measurement of natural geological samples by using laser ablation multi-collector ICP mass spectrometry（ LA-MC-ICP-MS） since 2006 have been reviewed in this paper. The review is focused on description of analytical protocol for isobaric interference correction of in situ Sm-Nd isotopic measurement by using LA-MC-ICP-MS. As it suggested,the reliable ¹⁴⁷Sm /¹⁴⁴Nd and¹⁴³Nd /¹⁴⁴Nd data of light REE enriched accessory minerals can be obtained by using LA-MC-ICP-MS. This is a primary technique for the in site Sm-Nd isotopic measurement of geological samples at present. Combining with U-Th-Pb dating and trace element analysis of accessory minerals,some important geochemical constraint parameters on the genetic evolution of those accessory minerals could be obtained. It is prospective that the combined in situ measurement technique for analyzing multiple isotopic systems（ such as Sr-Nd-Hf isotopes）,dating U-Th-Pb ages,analyzing trace elements of low contents geological samples（ < 500ppm）,and measuring precisely the Sm-Nd isotopic compositions of minerals with high Sm / Nd ratios（ such as the Sm / Nd ratio of xenotime is much higher than 1,even up to 10） will be one of the major development directions for the in situ SmNd isotopic measurement by using LA-MC-ICP-MS in the near future.更多还原