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Spatial statistical analysis of the distribution of komatite-hosted nickel sulfide deposits in the Kalgoorlie terrane, western Australia / Antony Mamuse in Economic geology, Vol. 105 N° 1 (Janvier/Fevrier 2010) 

Public ISBD [article]  in Economic geology > Vol. 105 N° 1 (Janvier/Fevrier 2010) . - pp. 229-242 Titre : Spatial statistical analysis of the distribution of komatite-hosted nickel sulfide deposits in the Kalgoorlie terrane, western Australia : clustered or not? Type de document : texte imprimé Auteurs : Antony Mamuse, Auteur ; Alok Porwal, Auteur ; Oliver Kreuzer, Auteur Année de publication : 2011 Article en page(s) : pp. 229-242 Note générale : Economic geology Langues : Anglais (eng) Mots-clés : Nickel  deposits  Spatial  analysis  Statistical  analysis  Australia Index. décimale : 553 Géologie économique. Minérographie. Minéraux. Formation et gisements de minerais Résumé : The spatial distribution of mineral deposits is a critical component of predictive estimation of undiscovered mineral resources. Nickel sulfide deposits in the Kalgoorlie terrane of Western Australia, the world’s premier province for komatiite-hosted nickel sulfide deposits, are generally perceived to be clustered. We apply distance-based spatial analysis methods (nearest neighbor and K function) to determine the spatial distribution pattern of nickel sulfide deposits in the Kalgoorlie terrane. Results of these spatial analyses indicate the komatiite bodies that contain the nickel sulfide deposits in the terrane are clustered. In contrast, nickel sulfide deposits within komatiite bodies are either randomly distributed or dispersed and not clustered. Therefore, the apparent clustering of nickel sulfide deposits within the Kalgoorlie terrane may be a mere expression of the underlying clustering of the host komatiite bodies. These findings have two main implications: (1) nickel exploration models implemented through area selection based on localization controls of favorable komatiite bodies, followed by direct detection of deposits within komatiite bodies have spatio-statistical validity, and (2) a Poisson distribution could be a plausible initial model for predicting the number of nickel sulfide deposits within a komatiite body. DEWEY : 553 ISSN : 0361-0128 En ligne : http://econgeol.geoscienceworld.org/content/105/1/229.abstract [article] Spatial statistical analysis of the distribution of komatite-hosted nickel sulfide deposits in the Kalgoorlie terrane, western Australia : clustered or not? [texte imprimé] / Antony Mamuse, Auteur ; Alok Porwal, Auteur ; Oliver Kreuzer, Auteur . - 2011 . - pp. 229-242. Economic geology Langues : Anglais (eng) in Economic geology > Vol. 105 N° 1 (Janvier/Fevrier 2010) . - pp. 229-242 Mots-clés : Nickel  deposits  Spatial  analysis  Statistical  analysis  Australia Index. décimale : 553 Géologie économique. Minérographie. Minéraux. Formation et gisements de minerais Résumé : The spatial distribution of mineral deposits is a critical component of predictive estimation of undiscovered mineral resources. Nickel sulfide deposits in the Kalgoorlie terrane of Western Australia, the world’s premier province for komatiite-hosted nickel sulfide deposits, are generally perceived to be clustered. We apply distance-based spatial analysis methods (nearest neighbor and K function) to determine the spatial distribution pattern of nickel sulfide deposits in the Kalgoorlie terrane. Results of these spatial analyses indicate the komatiite bodies that contain the nickel sulfide deposits in the terrane are clustered. In contrast, nickel sulfide deposits within komatiite bodies are either randomly distributed or dispersed and not clustered. Therefore, the apparent clustering of nickel sulfide deposits within the Kalgoorlie terrane may be a mere expression of the underlying clustering of the host komatiite bodies. These findings have two main implications: (1) nickel exploration models implemented through area selection based on localization controls of favorable komatiite bodies, followed by direct detection of deposits within komatiite bodies have spatio-statistical validity, and (2) a Poisson distribution could be a plausible initial model for predicting the number of nickel sulfide deposits within a komatiite body. DEWEY : 553 ISSN : 0361-0128 En ligne : http://econgeol.geoscienceworld.org/content/105/1/229.abstract