Fault and Joint Development in Brittle and Semi-Brittle Rock

Foreword


1. Brittle Fracture

Introduction

Stress

Elasticity

Strength of Brittle Material

Influence of Petrology on Uniaxial Strength

Influence of Environmental Factors on Brittle Failure

Relationships between Principal Stresses at Failure

Navier—Coulomb Criterion of Brittle Failure

Griffith Criterion of Brittle Failure

Crack Propagation

Microseisms

Time-Strain

Time—Strain Mechanism in Semi-Brittle Material

Long-Term Strength in Triaxial Compression


2. Faults

Introduction

Fault Nomenclature

The Navier—Coulomb Criterion and the Angle of Fracture

Dynamic Classification of Faults

Anisotropy and Shear Failure

Further Conditions of Strike-Slip Faulting

Structures Associated with Strike-Slip

Oblique-Slip Faults

Overthrust Faulting and Pore-Water Pressure

Thrust Development in Fold Belts

Faults in Sediments Due to Movement in the Basement Complex

Criticism of Using the Brittle Failure Criteria in the Faulting Problem


3. Joints

Introduction

Classification of Joints

Relationship of Joints to Other Structures

Surface Features

Joint Movement

Origin of Joints

Joint Frequency

Jointing Infolded Rock

Pinnate or Feather Joints

Inter-Relationship of Joint Sets

Jointing in Igneous Rocks

Columnar Joints

Sheet Joints

Joints—Brittle Fractures

Index