scholarly journals Dynamic evolution of deformation microstructures in rocks. Microstructures and rheology in fault rocks. Frictional properties of monzodiorite and gabbro during seismogenic fault motion.

1996 ◽  
Vol 102 (3) ◽  
pp. 240-248 ◽  
Author(s):  
Akito Tsutsumi ◽  
Toshihiko Shimamoto
Keyword(s):  
Dynamic Evolution ◽  
Seismogenic Fault ◽  
Fault Rocks ◽  
Frictional Properties

scholarly journals Large-displacement, hydrothermal frictional properties of DFDP-1 fault rocks, Alpine Fault, New Zealand: Implications for deep rupture propagation

2021 ◽  
Author(s):  
AR Niemeijer ◽  
Carolyn Boulton ◽  
VG Toy ◽  
John Townend ◽  
Rupert Sutherland
Keyword(s):  
New Zealand ◽  
Phase 1 ◽  
Rupture Propagation ◽  
Low Velocity ◽  
Fault Rocks ◽  
Frictional Properties ◽  
Alpine Fault ◽  
Rate And State Friction ◽  
Fault Gouges ◽  
Depth Extent

©2016. The Authors. The Alpine Fault, New Zealand, is a major plate-bounding fault that accommodates 65-75% of the total relative motion between the Australian and Pacific plates. Here we present data on the hydrothermal frictional properties of Alpine Fault rocks that surround the principal slip zones (PSZ) of the Alpine Fault and those comprising the PSZ itself. The samples were retrieved from relatively shallow depths during phase 1 of the Deep Fault Drilling Project (DFDP-1) at Gaunt Creek. Simulated fault gouges were sheared at temperatures of 25, 150, 300, 450, and 600°C in order to determine the friction coefficient as well as the velocity dependence of friction. Friction remains more or less constant with changes in temperature, but a transition from velocity-strengthening behavior to velocity-weakening behavior occurs at a temperature of T = 150°C. The transition depends on the absolute value of sliding velocity as well as temperature, with the velocity-weakening region restricted to higher velocity for higher temperatures. Friction was substantially lower for low-velocity shearing (V < 0.3 μm/s) at 600°C, but no transition to normal stress independence was observed. In the framework of rate-and-state friction, earthquake nucleation is most likely at an intermediate temperature of T = 300°C. The velocity-strengthening nature of the Alpine Fault rocks at higher temperatures may pose a barrier for rupture propagation to deeper levels, limiting the possible depth extent of large earthquakes. Our results highlight the importance of strain rate in controlling frictional behavior under conditions spanning the classical brittle-plastic transition for quartzofeldspathic compositions.

scholarly journals Large-displacement, hydrothermal frictional properties of DFDP-1 fault rocks, Alpine Fault, New Zealand: Implications for deep rupture propagation

2021 ◽  
Author(s):  
AR Niemeijer ◽  
Carolyn Boulton ◽  
VG Toy ◽  
John Townend ◽  
Rupert Sutherland
Keyword(s):  
New Zealand ◽  
Phase 1 ◽  
Rupture Propagation ◽  
Low Velocity ◽  
Fault Rocks ◽  
Frictional Properties ◽  
Alpine Fault ◽  
Rate And State Friction ◽  
Fault Gouges ◽  
Depth Extent

©2016. The Authors. The Alpine Fault, New Zealand, is a major plate-bounding fault that accommodates 65-75% of the total relative motion between the Australian and Pacific plates. Here we present data on the hydrothermal frictional properties of Alpine Fault rocks that surround the principal slip zones (PSZ) of the Alpine Fault and those comprising the PSZ itself. The samples were retrieved from relatively shallow depths during phase 1 of the Deep Fault Drilling Project (DFDP-1) at Gaunt Creek. Simulated fault gouges were sheared at temperatures of 25, 150, 300, 450, and 600°C in order to determine the friction coefficient as well as the velocity dependence of friction. Friction remains more or less constant with changes in temperature, but a transition from velocity-strengthening behavior to velocity-weakening behavior occurs at a temperature of T = 150°C. The transition depends on the absolute value of sliding velocity as well as temperature, with the velocity-weakening region restricted to higher velocity for higher temperatures. Friction was substantially lower for low-velocity shearing (V < 0.3 μm/s) at 600°C, but no transition to normal stress independence was observed. In the framework of rate-and-state friction, earthquake nucleation is most likely at an intermediate temperature of T = 300°C. The velocity-strengthening nature of the Alpine Fault rocks at higher temperatures may pose a barrier for rupture propagation to deeper levels, limiting the possible depth extent of large earthquakes. Our results highlight the importance of strain rate in controlling frictional behavior under conditions spanning the classical brittle-plastic transition for quartzofeldspathic compositions.

FEDERATED No. 8

Alloy Digest ◽  
1956 ◽  
Vol 5 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Frictional Properties ◽  
Good Corrosion Resistance ◽  
High Speeds ◽  
Bearing Alloy

Abstract FEDERATED No. 8 is a lead-base bearing alloy recommended for moderate to high speeds and moderate loads. It has very good frictional properties, reasonably good corrosion resistance and low price. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fatigue. It also includes information on casting and joining. Filing Code: Pb-3. Producer or source: Federated Metals Corporation, ASARCO Inc..

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