التفاصيل البيبلوغرافية
| العنوان: |
Evaluation of the impact of fragile-ductile-fault-related hydrothermal alteration on geomechanical parameters in highly anisotropic mine environments—an improved linking of geology and rock mechanics. |
| المؤلفون: |
Eslami, Esmaeil, Tremblay, Karolan, Seifaddini, Mahdiyeh, Saeidi, Ali, Mercier-Langevin, Patrick |
| المصدر: |
Arabian Journal of Geosciences; Sep2023, Vol. 16 Issue 9, p1-19, 19p |
| مصطلحات موضوعية: |
HYDROTHERMAL alteration, GEOLOGY, ANDESITE, MUSCOVITE, BASALT, ROCK mechanics |
| مصطلحات جغرافية: |
QUEBEC (Quebec) |
| مستخلص: |
Predicting the behavior of damaged and hydrothermally altered rocks is the key to the economic success and safety of rock engineering projects, such as surface and underground excavations. This study provides information and tools to facilitate determining favorable areas for excavation on the basis of geological, geomechanical, and structural parameters near a major fragile structure that cuts across a complexly deformed gold deposit. We use a structural, geological, and hydrothermal alteration model to determine the general characteristics of the Bousquet Fault at the Westwood gold mine, northern Québec, Canada. The characterization of hydrothermal alteration through lithogeochemical and petrographic analyses improved our understanding of the impact of the Bousquet Fault on the various surrounding geological units. Risks of rockburst and rock projection increase near the Bousquet Fault because of changes in rock rheology. These modifications were induced by chemical and mineralogical changes during hydrothermal alteration, including silicification and epidotization along the fault. Silicification was distributed heterogeneously along the fault and developed preferentially in some specific units such as basaltic and andesitic rocks. Sericite alteration, which consists of abundant fine-grained white micas, was associated with the ore zones that are crosscut by the Bousquet Fault. Sericitization was commonly of stronger intensity than epidote alteration and silicification, especially in the upper levels of the mine. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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