Stratigraphy and structural analysis of the North Gold Zone at Montauban-les-mines, Quebec

Abstract Seven lithologic units, informally characterized, were recognized in the vicinity of the Montauban orebody. The first five lie in stratigraphic order. From structural bottom to structural top these are: (1) grey composite gneiss; (2) dark grey quartz-biotite gneiss; (3) quartz-biotite-garnet gneiss hosting several calcareous, aluminous and magnesian members and gold mineralization; (4) light grey quartz-muscovite-(sericite)-biotite gneiss; and (5) metabasalts. The last two intrude the sequence: (6) amphibolite dykes and (7) pegmatite veins. The orebody lies on the inverted limb of an overturned synform verging to the west with the metabasalts marking the core of the fold. As the foliation is folded, this fold is attributed to deformation "D2"; deformation "Dl" being responsible for the formation of the foliation. A late brittle deformation developed shear zones with probable strike-slip motions. The refined stratigraphy and the identification of the structural position of the orebody provide new tools for regional interpretation and prospecting.
Keywords: Economic geology, Stratigraphy, Structural analysis, Montauban orebody.
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Summary: This paper deals with the quantitative analysis of mine maintenance records. Based on a case study of dozer engine records, the author suggests an easy method of deriving useful information for managerial decisions in a step-by-step manner. More specifically, the paper deals with the following topics:

determination of the most economical replacement time,
determination of reliability characteristics,
determination of the number of replacements, and
determination of the...
Publication: CIM Bulletin
Author(s): J.L. COLLINS
Keywords: Equipment, Mine maintenance, Records, Dozer engines, Engine repair.
Issue: 906
Volume: 80
Year: 1987
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Summary: Conventional single heading track drifting in the hard rock mining industry has not shown any significant improvements in advance rates, despite the advent of modern track jumbos and high speed muck handling systems.
This paper presents Kiena's experience in using a 7 ft 2 in. diameter Jarva Mark 6 Tunnel-Boring Machine (TBM)for driving 6000 ft of drift.
Publication: CIM Bulletin
Author(s): D. VAN IN
Keywords: Equipment, Maintenance, Tunnel-boring machine, Exploration drifting, Ventilation, Electrical power.
Issue: 906
Volume: 80
Year: 1987
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Summary: This paper presents an overview of plant electrical systems in general, a discussion of the problems that may occur due to plant growth, the maintenance required to maintain the reliability and safety of the electrical system, and the selectivity of the relay protection system. It is divided into two main areas: short circuit levels within the plant electrical system; and relay protection systems.
This information is directed at maintenance supervisors, mine managers and electrical superinten...
Publication: CIM Bulletin
Author(s): A.P. WILLIAMS
Keywords: Plant maintenance, Electrical systems, Mine management, Maintenance, Electrical faults.
Issue: 906
Volume: 80
Year: 1987
Text
Summary: A new method of managing electricity to reduce costs and improve profits is discussed. Before taking steps to better manage electricity, it is essential to understand the terms peak demand and energy and their effect on an electrical bill. Knowing how electricity is presently used in the plant is the important first step. This goes beyond knowing how much electricity is used at each time of day, the individual contribution of every plant process to the total plant load must be known. At this...
Publication: CIM Bulletin
Author(s): T. WILLIAMS, I. CLAUZIER
Keywords: Electricity, Management, Plant management, Computer application.
Issue: 906
Volume: 80
Year: 1987
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Summary: Mineral exploration is an expensive speculative venture and calls for optimization of sampling. Exploration is generally planned in grid pattern to be conducted in phased manner. The objective of any such campaign is to assess the quality, quantity and its reliability. The traditional estimation methods are unable to provide a means of calculating the degree of reliability. Application of mathematical models can quantify the precision of estimation and bring forth decision-making criteria at...
Publication: CIM Bulletin
Author(s): S.N. BHATNAGAR, S.K. HALDAR
Keywords: Mineral exploration, Sequential evaluation, Optimization in sampling, Frequency, Probability, Semivariogram, Rampura-Agucha
Issue: 906
Volume: 80
Year: 1987
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Summary: The development of Calf an, a new generation 95% zinc-5% aluminum-mischmetal alloy coating for steel, offers opportunities for greater fabrication flexibility and upgraded corrosion performance in automotive applications. The formability ofGalfan is equivalent to that of electrogalvanized steel, based on laboratory tests and automotive component fabrication. Corrosion resistance of Galfan exceeds that of hot dip and electrogalvanized, including performance in automotive industry tests....
Publication: CIM Bulletin
Author(s): RICHARD F. LYNCH, FRANK E. GOODWIN
Keywords: Materials engineering, Metallurgy, Galfan, Steel alloys, Alloys, Corrosion resistance, Steel formability, Coated steels, Zinc.
Issue: 906
Volume: 80
Year: 1987
Text
Summary: A study carried out on behalf of the National Research Council (NRC) indicates that economic losses due to wear in the Canadian mining industry are in excess of $700 million annually. Severe wear, mainly by abrasion, was identified as the most important wear mechanism in terms of possible savings. One way to reduce losses would be the proper use of databases. A joint project of The Canadian Institute of Mining and Metallurgy (CIM) and NRC (Tribology laboratories at IMR1) has been initiated to...
Publication: CIM Bulletin
Author(s): G. HUARD, J. PRINSEN, J. MASOUNAVE, J. MOLGAARD, P. BEAULIEU
Keywords: Equipment, Maintenance, Computer applications, Data base, National Research Council Canada, Tribology, CIM, Economics.
Issue: 906
Volume: 80
Year: 1987
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