1980年8月生于山东梁山。研究员。

放射性同位素年代学与岩石地球化学；岩浆岩成因与大地构造学；增生造山作用与大陆动力学机制；增生成矿理论与成矿构造背景。

(1)国家重大基础研究发展计划（973）项目:西天山石炭-二叠纪构造演化与浅成低温成矿系统(编号2014CB448000)执行期间: 2014-2018;  经费: 500万元。 

（1） Cai, K.D., Sun, M., Yuan, C., Zhao, G.C., Xiao, W.J., Long, X.P., Wu, F.Y., 2010. Geochronological and geochemical study of mafic dykes from the northwest Chinese Altai: Implications for petrogenesis and tectonic evolution. Gondwana Research 18, 638-652.  

（2） Cai, K.D., Sun, M., Yuan, C., Zhao, G.C., Xiao, W.J., Long, X.P., Wu, F.Y., 2011. Prolonged magmatism, juvenile nature and tectonic evolution of the Chinese Altai, NW China: Evidence from zircon U-Pb and Hf isotopic study of Paleozoic granitoids. Journal of Asian Earth Sciences 42, 949-968.  

（3） Cai, K.D., Sun, M., Yuan, C., Zhao, G.C., Xiao, W.J., Long, X.P., 2011. Geochronology, petrogenesis and tectonic significance of peraluminous granites from the Chinese Altai, NW China. Lithos127, 261-281.  

（4） Cai, K.D., Sun, M., Yuan, C., Zhao, G.C., Xiao, W.J., Long, X.P., Wu, F.Y., 2012. Carboniferous mantle-derived felsic intrusion in the Chieese Altai, NW China: implications for geodynamic change of the accretionary orogenic belt. Gondwana Research 22，681-698.  

（5） Cai, K.D., Sun, M., Yuan, C., Zhao, G.C., Xiao, W.J., Long, X.P., 2012. Keketuohai mafic-ultramafic complex from the Chinese Altai, NW China: petrogenesis and geodynamic significance. Chemical Geology 294-295, 26-41.