Collaborative Research: Structural - Petrologic Characterization of the San Andreas Fault Zone in the SAFOD Drill Holes

合作研究：SAFOD 钻孔中圣安德烈亚斯断层带的构造-岩石学特征

• 批准号: 0454531
• 负责人: David Kirschner
• 金额: --
• 依托单位: Saint Louis University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-06-01 至 2008-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0454531&HistoricalAwards=false
• 关键词: Collaborative; Research; Structural; Petrologic; Characterization

0454531KirschnerThe scientific objective of SAFOD is to understand the physical and chemical processes of deformation and earthquake generation within an active, plate-bounding fault. Comprehensive understanding will be possible only if the structure and geochemistry of the fault zone are thoroughly documented and integrated with other data. This collaborative effort will characterize the composition, structure and deformation mechanisms of the San Andreas fault at the Observatory. Observations of core and cuttings from the pilot hole and first two phases of drilling (2004-2005), and of samples from fault exposures near the drill site, will be integrated with geophysical and hydrologic data presented in other SAFOD studies to address key questions regarding structure, physical properties and mechanics of the fault, and to test hypotheses of earthquake rupture dynamics, energy balance, and fault weakening. Work includes determining fault rock lithology, and distributions and orientations of fractures, secondary faults, veins, and particle sizes, and targeting key structures for detailed microstructure, mineralogy, and geochemistry analyses.

0454531 Kirschner SAFOD的科学目标是了解活动板块边界断层内变形和地震生成的物理和化学过程。只有彻底记录断裂带的结构和地球化学并与其他数据相结合，才有可能全面了解。这一合作努力将表征天文台圣安德烈亚斯断层的组成、结构和变形机制。对导向孔和前两个钻井阶段的岩心和岩屑进行观察（2004-2005年），以及从钻井现场附近断层暴露的样本，将与其他SAFOD研究中提供的地球物理和水文数据相结合，以解决有关断层结构、物理性质和力学的关键问题，并检验地震破裂动力学、能量平衡、断层弱化工作包括确定断层岩岩性、裂缝的分布和方向、次级断层、矿脉和粒度，并针对关键结构进行详细的微观结构、矿物学和地球化学分析。