Multivariate data cleaning and reclassification of particle size distribution data for the Joslyn lease

CIM Journal, Vol. 6, No. 2, 2015, pages 67-74

P. Babak
Penn West Exploration, Calgary, Alberta, Canada
(formerly with Total E&P Canada, Calgary, Alberta, Canada)

P. Henriquel and E. Insalaco
Total E&P, Paris, France

O. Babak
Cenovus Energy, Calgary, Alberta, Canada
(formerly with Total E&P Canada, Calgary, Alberta, Canada

http://dx.doi.org/10.15834/cimj.2015.8
Résumé La détection des valeurs aberrantes constitue une étape primaire importante de la modélisation géologique. Les ensembles de données géologiques contiennent souvent des erreurs en raison de problèmes tels que les limitations des instruments de mesure et des pépins d’enregistrement. Dans le présent article, une méthode robuste basée sur la distance de Mahalanobis a été mise en oeuvre avec succès aux granulométries du bail minier Joslyn, un site de sables bitumineux en développement à proximité de Fort McMurray, Alberta, Canada. La détection automatique des valeurs aberrantes a été combinée à une étude géologique. Les valeurs aberrantes de la méthode de la distance de Manalanobis ont été comparées avec leurs photographies respectives de carottes de forage afin de déterminer si les mesures en laboratoire et la classification des faciès étaient correctes. Une procédure de vérification pour les techniciens de laboratoire est proposée.
Mots-Clé Échantillonnage à plusieurs variables, exploitation minière, granulométrie, nettoyage des données
Accés complet à Document technique
Version PDF pour 20,00 $
Autres documents dans CIM Journal, Vol. 6, No. 2, 2015
Recherche
Trier par :  Pertinence
Affichage des résultats 1 - 7
Texte
Publication: CIM Journal
Numéro: 2
Volume: 6
Année: 2015
Texte
Sommaire: This paper discusses the author’s work on international law norms of consultation with Indigenous communities and examines unexpected corporate stakeholder impacts on these norms. Customary international law, which governs the area, does not traditionally refer to corporate conduct. This paper surveys several sources on developing international law on consultation obligations; it also discusses the impacts these norms can have on corporate stakeholders in the mining industry. Finally, it asks...
Publication: CIM Journal
Auteur(s): D. Newman
Mots clés: Consultation, Duty to consult, Indigenous rights, International law, Mining law
Numéro: 2
Volume: 6
Année: 2015
Texte
Sommaire: To characterize noise and vibration sources of different types of mining equipment used in underground mining, the authors performed a study in eight Quebec mines on 28 pieces of equipment. This paper presents the procedure followed to select the equipment to be evaluated, and the low-cost acquisition system developed to perform multichannel time-domain data acquisition in harsh environments. It also presents the results obtained for the noise level produced by the equipment and for handarm...
Publication: CIM Journal
Auteur(s): M. Laflamme, P. Marcotte and J. Boutin, S. Ouellette and G. LeBlanc
Mots clés: Acquisition system, Informative document, Mining equipment, Noise, Vibration
Numéro: 2
Volume: 6
Année: 2015
Texte
Sommaire: This paper deals with the reconciliation of open stope performance at Olympic Dam, South Australia, with a focus on stope stability, recovery, and operational aspects of stope reconciliation in relation to the expected or planned stope design. The observed stope performance is inconsistent with the equivalent linear overbreak sloughing criteria for assessing the performance of large open stopes. The aim is to investigate new stope performance criteria using quantitative (overbreak, underbreak...
Publication: CIM Journal
Auteur(s): Y. Potvin, D. Grant and G. Mungur
Mots clés: Cavity monitoring system (CMS), Equivalent linear overbreak sloughing (ELOS), Open stope, Reconciliation
Numéro: 2
Volume: 6
Année: 2015
Texte
Sommaire: Without conscious effort and understanding, a number of factors unique to mineral exploration often hinder building sustainability in host communities. These include the episodic and transitory presence of an exploration team in the community and the inherent uncertainty of outcomes— most projects fail from an exploration perspective. Experience in rural communities across Mesoamerica, however, has shown that it is possible to go beyond pragmatic philanthropy and infrastructure improvements...
Publication: CIM Journal
Auteur(s): J. M. Ríos and I. Thomson
Mots clés: Benefits, Communities, Engagement, Mesoamerica, Mineral exploration, Social license to operate (SLO), Sustainable development
Numéro: 2
Volume: 6
Année: 2015
Texte
Sommaire: Traditional geostatistical modelling methods are difficult to apply to heavy-tailed deposits because the extreme positive skew of the grade distribution leads to bias. The focus here is on an innovative method of modelling the high-grade population by conditionally simulating discrete volumes (nuggets) of gold with marked Poisson and Cox processes. Capping and other ad-hoc manipulation of the assay data is not required; however, an intensity map for the point processes is required. The method...
Publication: CIM Journal
Auteur(s): C. R. Mooney, W. Board, J. B. Boisvert
Mots clés: Capping, Cox, Epithermal, Estimation, Geostatistics, Gold, Kriging, Poisson, Resources, Simulation, Skewed distribution
Numéro: 2
Volume: 6
Année: 2015
Texte
Sommaire: The tertiary diagram Al2O3-Sr-Y is a new tool to explore Archean volcanogenic massive sulphide (VMS) deposits. The diagram can be used to discriminate between the volcanic rocks where zinc is the dominant mineralization (Zn+ domain) and the rocks where copper is the dominant mineralization (Cu+ domain), as well as the volcanic rocks that were subjected to hydrothermal chloritization that could have led to the formation of chloritites associated with alteration chimneys (Cl+ domain). These...
Publication: CIM Journal
Auteur(s): M. Proulx
Mots clés: Al2O3-Sr-Y, Alteration, Exploration, Hydrothermal chimney, Tertiary diagram, Tool, Volcanogenic sulphides
Numéro: 2
Volume: 6
Année: 2015
Activé par Coveo Enterprise Search