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内蒙古黄土窑及其毗邻地区孔兹岩系已有一些1800～1900Ma的锆石U-Pb年龄数据,但因孔兹岩是高级变质的沉积岩,其锆石U-Pb年龄往往代表峰期变质年龄而不是原岩沉积年龄,因此孔兹岩系属太古宙还是古元古代长期未决。内蒙古黄土窑是晋蒙孔兹岩系的经典产地之一,对其锆石和金红石研究和年龄测试,得到孔兹岩系的碎屑锆石年龄为2310Ma,变质成因锆石年龄为1873Ma,金红石代表的冷却年龄为1793Ma。表明晋蒙孔兹岩系的原岩年龄为古元古代。
There are some U-Pb zircon ages dating from 1800 to 1900 Ma in the Khondashan of Inner Mongolia and adjacent areas, but the khondalites are highly metamorphosed sedimentary rocks. The zircon U-Pb ages tend to represent the peak metamorphic ages Rather than the original rock sedimentary age, so the khondalite belongs to the Archean or ancient palaeontology long-term pending. The loess kiln in Inner Mongolia is one of the classic places of origin of the Jinmenwoonds. For zircon and rutile research and age testing, the detrital zircon ages of the khondalite series are 2310Ma, metamorphic zircon ages are 1873Ma, The cooling age is 1793Ma. It shows that the original rock age of the Khondz-Kuang series is Paleoproterozoic.