Earth Sciences Division annual report 1990 [report]

1991 unpublished
DISCLAIMER This document was prepared as an account of work sponsored by the United States Government. Neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned
more » ... nge privately owned rights. Reference herein to any specific commercial product, process, or service by its trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof, or The Regents of the University of Califonda. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof or The Regents of the University of California and shall not be used for advertising or product endorsement purposes. This report has been reproduced directly from the best available copy. Available to DOE and DOE Contractors from the Office vi Scientists and engineers of the Earth Sciences Division, following the mission of a multipurpose National Laboratory, conduct research on a wide variety of topics relevant to the nation's energy development programs. This report summarizes the activities for 1990. The Earth Sciences Division has developed unique expertise in several research areas. This expertise is due in part to the special resources and facilities available to researchers at the Lawrence Berkeley Laboratory and in part to the Laboratory's commitment to technical and scientific excellence. In addition to the permanent Laboratory staff, University faculty members, postdoctoral fellows, students, and visiting scientists participate in many investigations. Each year, several Ph.D. and Master's theses are founded in research within the Division. Interlaboratory cooperation within the U.S. Department of Energy system and collaboration with other research institutions provide access to unmatched intellectual and technological resources for the study of complex problems. Much of the Division's research deals with the physical and chemical properties and processes in the earth's crust, from the partially saturated, low-temperature near-surface environment to the high-temperature environments characteristic of regions where magmatic-hydrothermal processes are active. Strengths in laboratory and field instrumentation, numerical modeling, and in situ measurement allow study of the transport of mass and heat through geologic media--studies that now include the appropriate chemical reactions and the hydraulic-mechanical complexities of fractured rock systems. Related and parallel laboratory and field investigations address the effects of temperature, pressure, stresses, pore fluids, and fractures on the elastic and electrical properties of rock masses. These studies are concerned with rock behavior in the brittle and ductile crustal regimes, and they drive the development of improved geomechanical and geophysical tools and techniques for mapping and characterizing heterogeneity in the subsurface. Recent initiatives in special areas of research have been generated in response to needs perceived by Congress, by DOE, by industry, or by the scientific community at large. Of particular note are three major Division efforts addressing problems in the discovery and recovery of petroleum, the application of isotope geochemistry to the study of getdynamic p=ocesses and earth history, and the development of borehole methods for high-
doi:10.2172/138215 fatcat:5ks2amtrx5c7rcrvou4m7vqa5y