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利用激光探针等离子体质谱（LAM－ICPMS）技术对中生代钻石进行了详细的206Pb／23U定年研究。采用线扫描（Linescan）进样法减小了传统的剥深（Depthprofile）进样法所引起的激光熔蚀分异效应；优化仪器参数可消减ICP－MS对Pb和U的质量歧视效应；测得了精确的206Pb／238U比值及年龄。研究结果表明，均匀颗粒锆石的206Ph／238U比值测量精度为2％～10％，定年精度和准确度优于3％；对大颗粒（100～160μm）及均匀的年轻锆石U－Pb定年可与灵敏的高分辨离子探针（SHRIMP）定年结果相比。
A detailed 206Pb / 23U dating study of Mesozoic diamonds has been performed using LAM-ICPMS. Linescan sampling reduces the effect of laser ablation caused by traditional Depthprofile injections. Optimizing the instrument parameters can reduce the mass discrimination effect of ICP-MS on Pb and U. Measurement Got accurate 206Pb / 238U ratio and age. The results show that the 206Ph / 238U ratio measurement accuracy of homogeneous zircon is 2% -10%, and the precision and accuracy of dating are better than 3%. For U-Pb dating of large grains (100 ~ 160μm) and uniform young zircon Compared with the sensitive high resolution ion probe (SHRIMP) dating results.