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库鲁克塔格西段出露含石墨、富铝矿物(矽线石、红柱石、堇青石)和石榴石为特征的高级变质岩石组合。对其岩石学特征及年代学研究,有助于了解塔里木克拉通变质基底性质。岩石学和岩石地球化学特征表明,该套岩石组合为典型的孔兹岩系,与华北克拉通及邻区具亲缘性。锆石U-Pb年代学研究表明,孔兹岩系存在1 928~2 636Ma物源区年龄信息,记录了~1.92 Ga和~1.85 Ga两期变质事件,为塔里木克拉通前寒武纪早期地质演化、Columbia超大陆恢复与重建提供了新证据。
The Kuruktag segment shows a combination of high-grade metamorphic rocks characterized by graphite, Al-rich minerals (sillimanite, andalusite, cordierite) and garnet. Its petrological characteristics and chronology are helpful to understand the nature of Tarim Kratong metamorphic basement. Petrology and geochemical characteristics of the rock show that the rock assemblage is a typical Khondalite series and is related to the North China craton and its adjacent areas. The zircon U-Pb chronological study shows that there are 1 928 ~ 2 636Ma provenance age information in the Khondalite series, and the ~ 1.92 Ga and ~ 1.85 Ga metamorphic events are recorded, indicating that the Precambrian geology Evolution, Columbia supercontinent restoration and reconstruction provided new evidence.