Meredith, PG;
Knight, KS;
Boon, SA;
Wood, IG;
(2001)
The microscopic origin of thermal cracking in rocks: An investigation by simultaneous time-of-flight neutron diffraction and acoustic emission monitoring.
Geophysical Research Letters
, 28
(10)
2105 - 2108.
10.1029/2000GL012470.
![]() Preview |
PDF
2000GL012470.pdf Available under License : See the attached licence file. Download (568kB) |
Abstract
We demonstrate that neutron diffraction measurements make it possible to quantify elastic strains within the interior of solid samples, and thus have great potential for addressing a wide range of problems connected with the characterization of the mechanical properties of geological materials. We use the time-of-flight neutron diffraction technique, in combination with acoustic emission monitoring, to study the evolution of thermal strain within the interior of samples of a pure quartzite during slow heating, and the onset of the associated thermal cracking. Thermal cracking commences around 180 degreesC when the thermal strain deficit along the a-axes of quartz grains induces a thermal stress that is close to the bulk tensile strength of the rock.
Type: | Article |
---|---|
Title: | The microscopic origin of thermal cracking in rocks: An investigation by simultaneous time-of-flight neutron diffraction and acoustic emission monitoring |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1029/2000GL012470 |
Publisher version: | http://dx.doi.org/10.1029/2000GL012470 |
Language: | English |
Additional information: | Copyright 2001 by the American Geophysical Union |
Keywords: | Phase-transition, Stress, Quartz |
UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
URI: | https://discovery.ucl.ac.uk/id/eprint/8845 |
Archive Staff Only
![]() |
View Item |