Supplement to Project Geology Report:Auburn Dam. Seismic Evaluation of Auburn Damsite. Volume 3:Study of Dike/Fault Intersections Northwest Portion of the Auburn Damsite,

摘要

This report presents the results of the geologic investigation of the structural relationships between two major faults and intrusive dikes which intersect these faults in the Auburn Damsite area. These dikes are part of a complex network of several dike types intruded during different ages. Geologic relationships in the damsite area and specific study areas, a discussion of the mechanics of dike emplacement and intrussive phenomena;and the use of the dikes to determine magnitude,direction and probable age of net slip for two principal faults are discussed. Appended to the report are 20geologic drawings,many of which are at scales of 1-inch equals 1-foot,which are color printed and oversize. These drawings cannot be included in the microfilm copies but are available upon request from the U.S. Bureau of Reclamation.