David A Lockner
David Lockner is a geophysicist in the Earthquake Science Center.
Science and Products
Filter Total Items: 14
Data Release for "Role of Fault Gouge during Interaction between Hydraulic Fracture and a Preexisting Fracture" Data Release for "Role of Fault Gouge during Interaction between Hydraulic Fracture and a Preexisting Fracture"
Enhanced reservoir connectivity generally requires maximizing the intersection between hydraulic fracture (HF) and preexisting underground natural fractures (NF), while having the hydraulic fracture continue to propagate across the natural fractures. Observations of downhole core samples suggest that these natural fractures are in fact veins filled with minerals such as calcite (Mighani...
Glass deformation experiments under hydrothermal conditions Glass deformation experiments under hydrothermal conditions
Six time-series data files are included in this release. The files contain mechanical data (described in metadata file below) collected during deformation experiments performed on obsidian gouge. A detailed description of the experiments along with the data reduction procedures are provided in the published manuscript titled Conversion of wet glass to melt at lower seismogenic zone...
Filter Total Items: 115
Direct evidence for fluid pressure, dilatancy, and compaction affecting slip in isolated faults Direct evidence for fluid pressure, dilatancy, and compaction affecting slip in isolated faults
Earthquake instability occurs as a result of strength loss during sliding on a fault. It has been known for over 50 years that fault compaction or dilatancy may cause significant weakening or strengthening by dramatically changing the fluid pressure trapped in faults. Despite this fundamental importance, we have no real understanding of the exact conditions that lead to compaction or...
Authors
Brooks P. Proctor, David A. Lockner, Brian D. Kilgore, Thomas M. Mitchell, Nicholas M. Beeler
The susceptibility of Oklahoma’s basement to seismic reactivation The susceptibility of Oklahoma’s basement to seismic reactivation
Recent widespread seismicity in Oklahoma is attributed to the reactivation of pre-existing, critically stressed and seismically unstable faults due to decades of wastewater injection. However, the structure and properties of the reactivated faults remain concealed by the sedimentary cover. Here, we explore the major ingredients needed to induce earthquakes in Oklahoma by characterizing...
Authors
Folarin Kolawole, C.S. Johnston, C.B. Morgan, Jefferson Chang, K Marfurt, David A. Lockner, Ze’ev Reches, B M Carpenter
Near-fault velocity spectra from laboratory failures and their relation to natural ground motion Near-fault velocity spectra from laboratory failures and their relation to natural ground motion
We compared near-fault velocity spectra recorded during laboratory experiments to that of natural earthquakes. We fractured crystalline rock samples at room temperature and intermediate confining pressure (50 MPa). Subsequent slip events were generated on the fracture surfaces under higher confinement (300 MPa). Velocity spectra from rock fracture resemble the inverse frequency (1/f)...
Authors
Nicholas M. Beeler, David A. Lockner, Brian D. Kilgore, Greg McClaskey
Data Report: Permeability, porosity, and frictional strength of core samples from IODP Expedition 366 in the Mariana forearc Data Report: Permeability, porosity, and frictional strength of core samples from IODP Expedition 366 in the Mariana forearc
Core samples from the International Ocean Discovery Program (IODP) Expedition 366 were tested in the laboratory to determine permeability, porosity, density, and frictional strength and their relation to mineralogy as part of an effort to understand hydro-mechanical processes at convergent plate margins. Seven samples were tested from a depth range of 19.6 to 197.9 m below the sea floor...
Authors
Carolyn A. Morrow, Diane E. Moore, David A. Lockner, Barbara A. Bekins
Role of fault gouge during Interaction between hydraulic fracture and a preexisting fracture Role of fault gouge during Interaction between hydraulic fracture and a preexisting fracture
Enhanced reservoir connectivity generally requires maximizing the intersection between hydraulic fracture (HF) and preexisting underground natural fractures (NF), while having the hydraulic fracture continue to propagate across the natural fractures. Observations of downhole core samples suggest that these natural fractures are in fact veins filled with minerals such as calcite (Mighani...
Authors
S. Mighani, David A. Lockner, Brian D. Kilgore, Brian Evans
KG²B, a collaborative benchmarking exercise for estimating the permeability of the Grimsel granodiorite - Part 1: measurements, pressure dependence and pore-fluid effects KG²B, a collaborative benchmarking exercise for estimating the permeability of the Grimsel granodiorite - Part 1: measurements, pressure dependence and pore-fluid effects
Measuring the permeability of tight rocks remains a challenging task. In addition to the traditional sources of errors that affect more permeable formations (e.g. sample selection, non-representative specimens, disturbance introduced during sample acquisition and preparation), tight rocks can be particularly prone to solid–fluid interactions and thus more sensitive to the methods...
Authors
Christian David, J. Wasserman, F. Amann, David A. Lockner, E.H. Rutter, T Vanorio, A. Amann Hildenbrand, J. Billiotte, T. Reuschle, D. Lasseux, J. Fortin, R. Lenormand, A.P.S. Selvadurai, P.G. Meredith, J. Browning, T.M. Mitchell, D. Loggia, F. Nono, J. Sarout, L. Esteban, C. Davy, L. Louis, G. Boitnott, C. Madonna, E. Jahns, Fleury. M., G. Berthe, P. Delage, P. Braun, D. Gregoire, L. Perrier, P. Polito, Y. Jannot, A. Sommier, B. Krooss, R. Fink, Q. Hu, J.M. Klaver, A. Clark
Science and Products
Filter Total Items: 14
Data Release for "Role of Fault Gouge during Interaction between Hydraulic Fracture and a Preexisting Fracture" Data Release for "Role of Fault Gouge during Interaction between Hydraulic Fracture and a Preexisting Fracture"
Enhanced reservoir connectivity generally requires maximizing the intersection between hydraulic fracture (HF) and preexisting underground natural fractures (NF), while having the hydraulic fracture continue to propagate across the natural fractures. Observations of downhole core samples suggest that these natural fractures are in fact veins filled with minerals such as calcite (Mighani...
Glass deformation experiments under hydrothermal conditions Glass deformation experiments under hydrothermal conditions
Six time-series data files are included in this release. The files contain mechanical data (described in metadata file below) collected during deformation experiments performed on obsidian gouge. A detailed description of the experiments along with the data reduction procedures are provided in the published manuscript titled Conversion of wet glass to melt at lower seismogenic zone...
Filter Total Items: 115
Direct evidence for fluid pressure, dilatancy, and compaction affecting slip in isolated faults Direct evidence for fluid pressure, dilatancy, and compaction affecting slip in isolated faults
Earthquake instability occurs as a result of strength loss during sliding on a fault. It has been known for over 50 years that fault compaction or dilatancy may cause significant weakening or strengthening by dramatically changing the fluid pressure trapped in faults. Despite this fundamental importance, we have no real understanding of the exact conditions that lead to compaction or...
Authors
Brooks P. Proctor, David A. Lockner, Brian D. Kilgore, Thomas M. Mitchell, Nicholas M. Beeler
The susceptibility of Oklahoma’s basement to seismic reactivation The susceptibility of Oklahoma’s basement to seismic reactivation
Recent widespread seismicity in Oklahoma is attributed to the reactivation of pre-existing, critically stressed and seismically unstable faults due to decades of wastewater injection. However, the structure and properties of the reactivated faults remain concealed by the sedimentary cover. Here, we explore the major ingredients needed to induce earthquakes in Oklahoma by characterizing...
Authors
Folarin Kolawole, C.S. Johnston, C.B. Morgan, Jefferson Chang, K Marfurt, David A. Lockner, Ze’ev Reches, B M Carpenter
Near-fault velocity spectra from laboratory failures and their relation to natural ground motion Near-fault velocity spectra from laboratory failures and their relation to natural ground motion
We compared near-fault velocity spectra recorded during laboratory experiments to that of natural earthquakes. We fractured crystalline rock samples at room temperature and intermediate confining pressure (50 MPa). Subsequent slip events were generated on the fracture surfaces under higher confinement (300 MPa). Velocity spectra from rock fracture resemble the inverse frequency (1/f)...
Authors
Nicholas M. Beeler, David A. Lockner, Brian D. Kilgore, Greg McClaskey
Data Report: Permeability, porosity, and frictional strength of core samples from IODP Expedition 366 in the Mariana forearc Data Report: Permeability, porosity, and frictional strength of core samples from IODP Expedition 366 in the Mariana forearc
Core samples from the International Ocean Discovery Program (IODP) Expedition 366 were tested in the laboratory to determine permeability, porosity, density, and frictional strength and their relation to mineralogy as part of an effort to understand hydro-mechanical processes at convergent plate margins. Seven samples were tested from a depth range of 19.6 to 197.9 m below the sea floor...
Authors
Carolyn A. Morrow, Diane E. Moore, David A. Lockner, Barbara A. Bekins
Role of fault gouge during Interaction between hydraulic fracture and a preexisting fracture Role of fault gouge during Interaction between hydraulic fracture and a preexisting fracture
Enhanced reservoir connectivity generally requires maximizing the intersection between hydraulic fracture (HF) and preexisting underground natural fractures (NF), while having the hydraulic fracture continue to propagate across the natural fractures. Observations of downhole core samples suggest that these natural fractures are in fact veins filled with minerals such as calcite (Mighani...
Authors
S. Mighani, David A. Lockner, Brian D. Kilgore, Brian Evans
KG²B, a collaborative benchmarking exercise for estimating the permeability of the Grimsel granodiorite - Part 1: measurements, pressure dependence and pore-fluid effects KG²B, a collaborative benchmarking exercise for estimating the permeability of the Grimsel granodiorite - Part 1: measurements, pressure dependence and pore-fluid effects
Measuring the permeability of tight rocks remains a challenging task. In addition to the traditional sources of errors that affect more permeable formations (e.g. sample selection, non-representative specimens, disturbance introduced during sample acquisition and preparation), tight rocks can be particularly prone to solid–fluid interactions and thus more sensitive to the methods...
Authors
Christian David, J. Wasserman, F. Amann, David A. Lockner, E.H. Rutter, T Vanorio, A. Amann Hildenbrand, J. Billiotte, T. Reuschle, D. Lasseux, J. Fortin, R. Lenormand, A.P.S. Selvadurai, P.G. Meredith, J. Browning, T.M. Mitchell, D. Loggia, F. Nono, J. Sarout, L. Esteban, C. Davy, L. Louis, G. Boitnott, C. Madonna, E. Jahns, Fleury. M., G. Berthe, P. Delage, P. Braun, D. Gregoire, L. Perrier, P. Polito, Y. Jannot, A. Sommier, B. Krooss, R. Fink, Q. Hu, J.M. Klaver, A. Clark