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Based on the detailed field work, geochronology, geochemistry and oxygen fugacity characteristics, accompanied with tracing the regional faults and their framework, this article makes an attempt to identify and reveal the evolution trend, material source and geological background of igneous rocks; analyze magmatic oxygen fugacity characteristics of the Yanshanian igneous rocks;discusses the characteristics of magma oxygen fugacity. This paper provides evidence for ascertaining the genetic relationship between magmatic rocks and tectonic setting of the study area; The content of trace elements in zircon showed that igneous rocks formed early generally have higher Ce4+/Ce3+ value, high oxygen fugacity; whereas igneous rocks formed later generally have lower Ce4+/Ce3+ value, indicating the magma with low oxygen fugacity.


Oxygen Fugacity, Tectonic Evolution, Xintianling.
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