DEFORMATION CHARACTERISTICS AND ESR DATING OF ANHUA-XUPU FAULT BELT IN THE XUEFENG MOUNATAINS, HUNAN

作者：YANGKuifeng YANGKunguang MAChangqian

摘要：Anhua-Xupu fault belt plays a very important role in the formation of Xuefeng Mountains. The fault belt shows an arc-structure extruding towards NW. Fault rocks, microstructures and homogeneous temperature (concentrated around 160°C) of fluid inclusions in the quartz veins shows that the fault belt mainly underwent shallow brittle deformation and the highest-grade dynamic metamorphic rock is mylonitized sericite phyllite. The ESR (Electron Spin Resonance) dating from the quartz veins in the fault rocks shows that the fault belt underwent two intense fluid movement stages at Yanshanian (156.9～136.2Ma, 119.8～90.6Ma); moreover not only the occurrence and microstructures but also the homogeneous temperature of the quartz veins developed in that two stages show obvious diversity,which can prove that there exists the reversion period of Mesozoic extension and compression movement of Xuefeng mountains between these two stages.

發文機構：FacultyofEarthScience

關鍵詞：雪峰山安化-許浦斷層流動包體ESR電子自旋共振the Xuefeng MountainsAnhua-Xupu fault beltESRfluid inclusions

分類號： P542.31[天文地球—構造地質學][天文地球—地質學]