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| Titel: |
Computer-aided structural targeting in mineral exploration: Two- and three-dimensional stress mapping |
| Auteur: |
Holyland, P. W. Ojala, V. J. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 44 (1997) nr. 4 pagina's 421-432 |
| Jaar: |
1997-08 |
| Inhoud: |
This paper examines a geomechanical approach to predict the location of structurally controlled hydrothermal Mississippi Valley-type Pb-Zn mineralisation and Archaean gold mineralisation using the Stress Mapping Technique. Two-dimensional modelling used the finite difference/distinct element code in the UDEC program and three-dimensional used the indirect boundary element method in the MAP3D program. Two-dimensional, regional-scale, stress modelling of the Lennard Shelf, Western Australia shows that most of the known Mississippi Valley-type deposits and prospects are located within or near the modelled minimum principal-stress anomalies using the gross geology of the Lennard Shelf and an east-northeast-west-southwest extension direction. Three-dimensional stress modelling was used to model stress fields around the eastern margin of the Granny Smith Granodiorite under east-west compression at the Granny Smith mine, Laverton, Western Australia. At a deposit scale, the patterns of the simulated minimum principal-stress correlate well with the known areas of gold mineralisation near the contact between the Granny Smith Granodiorite and sedimentary rocks. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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