| Reference Type | Journal (article/letter/editorial) |
|---|
| Title | Mechanisms of high temperature frictional sliding in Westerly granite |
|---|
| Journal | Canadian Journal of Earth Sciences |
|---|
| Authors | Stesky, R. M. | Author |
|---|
| Year | 1978 (March 1) | Volume | 15 |
|---|
| Issue | 3 |
|---|
| Publisher | Canadian Science Publishing |
|---|
| DOI | doi:10.1139/e78-042Search in ResearchGate |
|---|
| Generate Citation Formats |
|---|
| Mindat Ref. ID | 475770 | Long-form Identifier | mindat:1:5:475770:6 |
|---|
|
| GUID | 0 |
|---|
| Full Reference | Stesky, R. M. (1978) Mechanisms of high temperature frictional sliding in Westerly granite. Canadian Journal of Earth Sciences, 15 (3) 361-375 doi:10.1139/e78-042 |
|---|
| Plain Text | Stesky, R. M. (1978) Mechanisms of high temperature frictional sliding in Westerly granite. Canadian Journal of Earth Sciences, 15 (3) 361-375 doi:10.1139/e78-042 |
|---|
| In | (1978, March) Canadian Journal of Earth Sciences Vol. 15 (3) Canadian Science Publishing |
|---|
| Abstract/Notes | The mechanisms of frictional sliding in faulted Westerly granite were studied in two ways. Firstly, the experimental activation energy was measured from 300 to 700 °C at 2.5 kbar (2.5 × 105 kPa) pressure and sliding rates from 10−5 to 10−2 cm/s. Secondly, fault samples were examined with an optical and a transmission electron microscope. Below 500 °C the activation energy was about 30 kcal/mol (1.3 × 105 J/mol). The fault gouge was porous and consisted of angular randomly oriented grains. The quartz and the feldspars were unstrained, similar to the grains in a room-temperature fault. Above 500 °C the activation energy increased to about 85 kcal/mol (3.6 × 105 J/mol). Plasticity in quartz about 500 °C was observed optically by the presence of highly strained gouge grains and with the transmission electron microscope by a marked increase in dislocation density from 3 × 108 cm−2 initially to greater than 1011 cm−2 at 700 °C. The quartz grains away from the fault were strain-hardened with inhomogeneously distributed, dense tangles of dislocations. In contrast, the small grains (<10 μm) in the gouge contained a low density of dislocations. The feldspars showed no sign of plasticity up to 700 °C. Biotite and muscovite were plastic at all temperatures, forming thin ribbons along slip surfaces in the fault zone. Glass was not identified in any of the faulted samples studied. |
|---|
These are possibly similar items as determined by title/reference text matching only.
