中国地质调查局地质力学所张拴宏研究员等人在白云鄂博矿区开展富稀土-Nb火成碳酸岩年代学研究过程中,成功地从白云鄂博矿区东侧靠近晚古生代花岗岩接触带的3个富稀土-Nb火成碳酸岩样品中分选出了斜锆石。这是世界上首例在火成碳酸盐中发现接触交代成因的斜锆石。作为硅不饱和岩浆中结晶的副矿物之一,斜锆石(Zr O2)在基性—超基性岩及碱性岩如碳酸岩、金伯利岩、辉绿岩、正长岩、辉长岩等的精确定年中发挥着越来越重要的作用。由于成因简单(一般均为岩浆结晶成因)并且普通铅含量很低,斜锆石已经成为国内外开展硅不饱和岩石U-Pb定年的首选矿物之一。 Researcher Zhang Shuanhong, a member of the Institute of Geomechanics, China Geological Survey, successfully carried out rare-earth-Nb pyrogenic carbonatochronology in the Baiyunebo mining area and succeeded in finding three rare earth- Oxymatrine samples were fractionated into orthorhombic zircons. This is the first orthodox zircon in the world that has been found to have been involved in the formation of contact metasoma in carbonate rocks. As one of the secondary minerals crystallized in unsaturated magma of Si, orthorhombic zircon (Zr O2) is widely distributed in basic-ultrabasic and alkaline rocks such as carbonate, kimberlite, diabase, syenite, gabbro And other precise dating play an increasingly important role. Because of its simple genesis (usually caused by magma crystallization) and its low normal lead content, orthoclase zircon has become one of the most preferred minerals for carrying out U-Pb dating of unsaturated silicon in the world.