Application of the time-domain induced polarization technique to characterize the ORman gold prospect in Mondulkiri Province, Cambodia
Thibaut, Robin
Promotor(s) :
Nguyen, Frédéric
Date of defense : 7-Sep-2017/8-Sep-2017 • Permalink : http://hdl.handle.net/2268.2/3270
Details
Title : | Application of the time-domain induced polarization technique to characterize the ORman gold prospect in Mondulkiri Province, Cambodia |
Translated title : | [en] Application of the time-domain induced polarization technique to characterize the ORman gold prospect in Mondulkiri Province, Cambodia |
Author : | Thibaut, Robin ![]() |
Date of defense : | 7-Sep-2017/8-Sep-2017 |
Advisor(s) : | Nguyen, Frédéric ![]() |
Committee's member(s) : | Pirard, Eric ![]() Kemna, A. Ngun, Bun Kim Charlier, Bernard ![]() |
Language : | English |
Number of pages : | 147 |
Keywords : | [en] minimum gradient support [en] focusing parameter [en] sharp inversion [en] induced polarization [en] resistivity [en] Cambodian gold deposit |
Discipline(s) : | Engineering, computing & technology > Geological, petroleum & mining engineering |
Institution(s) : | Université de Liège, Liège, Belgique |
Degree: | Master en ingénieur civil des mines et géologue, à finalité spécialisée en géologie de l'ingénieur et de l'environnement |
Faculty: | Master thesis of the Faculté des Sciences appliquées |
Abstract
[en] The aim of this thesis is to develop a new approach in the implementation of the minimum gradient support regularization operator, applied to a time-domain induced polarization problem. Indeed, this promising functional has not been enough implemented in real and large surveys yet. It is mainly confined to research studies applied to synthetic cases, although it can often offer significant advantages compared to the traditional smooth inversions, according to Occam's principle. The resistivity and induced polarization data was acquired during a geophysical campaign in Mondulkiri Province, Cambodia, on the largest known gold resource of the country. The deposit is an Intrusion Related Gold system, characterized by polarizable sulphides minerals. Four long profiles were realized on the contact zone between a magmatic intrusive and the hosting sediment formations, which is a zone of interest concerning gold mineralizations. By implementing different inversion approaches and tuning the focusing parameter, the a-priori information has revealed itself as being of uttermost importance on the process convergence towards a stable and realistic solution, and a methodology is therefore established.
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