David A Lockner
David Lockner is a geophysicist in the Earthquake Science Center.
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Complex resistivity of fault gouge and its significance for earthquake lights and induced polarization Complex resistivity of fault gouge and its significance for earthquake lights and induced polarization
We have measured complex resistivity of 2 water-saturated San Andreas fault gouges from 10−3 to 106 Hz and confining pressures of 0.2 to 200 MPa. Consistent with earlier observations of clays and common rocks, large low-frequency permittivities were observed in all cases. Comparisons were made to induced polarization (IP) measurements by inversion of the data into the time domain, where...
Authors
David A. Lockner, James D. Byerlee
Pressure solution and hydrothermal recrystallization of carbonate sediments — an experimental study — reply Pressure solution and hydrothermal recrystallization of carbonate sediments — an experimental study — reply
No abstract available.
Authors
P.A. Baker, M. Kastner, J.D. Byerlee, D.A. Lockner
A mechanism to explain the generation of earthquake lights A mechanism to explain the generation of earthquake lights
Explanations of how earthquake lights might arise have failed to show how large charge densities can be concentrated and sustained in a conductive Earth. A physical model is proposed, based on frictional heating of the fault, that solves this and related problems. ?? 1983 Nature Publishing Group.
Authors
D.A. Lockner, M.J.S. Johnston, J.D. Byerlee
Laboratory measurements of reservoir rock from the Geysers geothermal field, California Laboratory measurements of reservoir rock from the Geysers geothermal field, California
Rock samples taken from two outcrops, as well as rare cores from three well bores at the Geysers geothermal field, California, were tested at temperatures and pressures similar to those found in the geothermal field. Both intact and 30?? sawcut cylinders were deformed at confining pressures of 200-1000 bars, pore pressure of 30 bars and temperatures of 150?? and 240??C. Thin-section and...
Authors
D.A. Lockner, R. Summers, D. Moore, J.D. Byerlee
A laboratory control system using the PDP 1103 microprocessor A laboratory control system using the PDP 1103 microprocessor
No abstract available.
Authors
David A. Lockner, John D. Weeks, J.D. Byerlee
Velocity anomalies: An alternative explanation based on data from laboratory experiments Velocity anomalies: An alternative explanation based on data from laboratory experiments
Locations and velocities were calculated for microseisms occurring in samples of rock subjected to triaxial loading and injection of pore fluid. This was accomplished by analyzing arrival times of acoustic emission using an automatic first arrival picker. Apparent velocity anomalies were observed prior to both failure of intact samples and violent slip in samples containing saw cuts...
Authors
D.A. Lockner, J.D. Byerlee
Science and Products
Filter Total Items: 13
No Result Found
Filter Total Items: 114
Complex resistivity of fault gouge and its significance for earthquake lights and induced polarization Complex resistivity of fault gouge and its significance for earthquake lights and induced polarization
We have measured complex resistivity of 2 water-saturated San Andreas fault gouges from 10−3 to 106 Hz and confining pressures of 0.2 to 200 MPa. Consistent with earlier observations of clays and common rocks, large low-frequency permittivities were observed in all cases. Comparisons were made to induced polarization (IP) measurements by inversion of the data into the time domain, where...
Authors
David A. Lockner, James D. Byerlee
Pressure solution and hydrothermal recrystallization of carbonate sediments — an experimental study — reply Pressure solution and hydrothermal recrystallization of carbonate sediments — an experimental study — reply
No abstract available.
Authors
P.A. Baker, M. Kastner, J.D. Byerlee, D.A. Lockner
A mechanism to explain the generation of earthquake lights A mechanism to explain the generation of earthquake lights
Explanations of how earthquake lights might arise have failed to show how large charge densities can be concentrated and sustained in a conductive Earth. A physical model is proposed, based on frictional heating of the fault, that solves this and related problems. ?? 1983 Nature Publishing Group.
Authors
D.A. Lockner, M.J.S. Johnston, J.D. Byerlee
Laboratory measurements of reservoir rock from the Geysers geothermal field, California Laboratory measurements of reservoir rock from the Geysers geothermal field, California
Rock samples taken from two outcrops, as well as rare cores from three well bores at the Geysers geothermal field, California, were tested at temperatures and pressures similar to those found in the geothermal field. Both intact and 30?? sawcut cylinders were deformed at confining pressures of 200-1000 bars, pore pressure of 30 bars and temperatures of 150?? and 240??C. Thin-section and...
Authors
D.A. Lockner, R. Summers, D. Moore, J.D. Byerlee
A laboratory control system using the PDP 1103 microprocessor A laboratory control system using the PDP 1103 microprocessor
No abstract available.
Authors
David A. Lockner, John D. Weeks, J.D. Byerlee
Velocity anomalies: An alternative explanation based on data from laboratory experiments Velocity anomalies: An alternative explanation based on data from laboratory experiments
Locations and velocities were calculated for microseisms occurring in samples of rock subjected to triaxial loading and injection of pore fluid. This was accomplished by analyzing arrival times of acoustic emission using an automatic first arrival picker. Apparent velocity anomalies were observed prior to both failure of intact samples and violent slip in samples containing saw cuts...
Authors
D.A. Lockner, J.D. Byerlee