LA-ICP-MS Zircon U-Pb Dating of the Huangyangshan Pluton and Its Enclaves from Kalamaili Area Eastern Junggar,and Geological Implications

摘要

LA-ICP-MS zircon U-Pb dating has revealed that the Huangyangshan pluton in Eastern Junggar was formed at 311±12 Ma,and that microgranular enclaves were formed at 300±6 Ma;both ages are very consistent within errors.It is the first time that the microgranular enclaves age in Kalamaili area was determined.Petrochemistry and geochemistry research shows the characteristics of host rock as follows: