本申请以“汶川地震科学钻探（WFSD）”五口钻井中的岩芯为主要研究对象，通过对断裂岩尤其是“新鲜断层泥”的微构造学、矿物学、岩石学、地球化学、磁学和热历史的详细研究，认识和确定地震断裂构造特性、地震发生过程中岩石的物理、化学变化和成因，以及断裂作用可能遭受的热历史，并进行五口井的岩芯中断裂岩的对比研究，认识不同性质的映秀-北川断裂和灌县-安县断裂特征，及其围岩和流体对地震断裂作用的影响，确定不同性质的地震断裂特性和行为、断裂快速滑移机制、物理-化学性质、地震后的断裂愈合作用和地震过程中的能量迁移，探讨汶川地震的发生机理，并结合有关年代学研究重塑龙门山断裂带的抬升历史。该研究为探讨断裂作用过程与地震破裂机制提供详细数据，对进一步认识和理解大地震破裂过程，以及对防震减灾和构造地质与地球动力学领域的基础研究都具有重大意义。

This project will focus on the core of the five scientific holes drilled by “Wenchuan earthquake Fault Scientific Drilling (WFSD)”. On the basis of detailed researches on the microstructure, mineralogical, petrologic, geochemical, magnetic and thermal history of fault rocks (especially the “fresh gouge”) we want to know the structural features of seismic faults, the rock physical/chemical variation during earthquake and the thermal history the fault have underwent, to determine the fault slip mechanism, fault physical/chemical characteristics and fracture energy. Comparison research will also be made on the fault rocks collected from the five holes, to reveal the gouge features and its physical/chemical properties of the two different faults (Yingxiu-Beichuan fault and Guanxian-Anxian fault), then to discuss the effect of whole rocks and fluid on the rock types, structures and seismic origin along the fracture zones, recognize the different seismic fault features and activities, investigate the Wenchuan earthquake rupture mechanism; moreover, we also want to outline the formation sequence and fault behavior varying with the seismic cycle by combining various chronological data, and rebuild the uplift process of the Longmenshan fault zone. This research will provide substantial data for studying fault features and rupture mechanism and has import meaning for understanding the rupture process of great seismic events.