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The evaluation of brine prospects and the requirement for modifications to filing standards / John Houston in Economic geology, Vol. 106 N° 7 (Novembre 2011) 

Public ISBD [article]  in Economic geology > Vol. 106 N° 7 (Novembre 2011) . - pp. 1225-1239 Titre : The evaluation of brine prospects and the requirement for modifications to filing standards Type de document : texte imprimé Auteurs : John Houston, Auteur ; Andrew Butcher, Auteur ; Peter Ehren, Auteur Année de publication : 2011 Article en page(s) : pp. 1225-1239 Note générale : Economic geology Langues : Anglais (eng) Mots-clés : Brine  prospects  Lithium  exploration Index. décimale : 553 Géologie économique. Minérographie. Minéraux. Formation et gisements de minerais Résumé : The recent increase in demand for lithium has led to the development of new brine prospects, particularly in the Central Andes. The brines are hosted in closed basin aquifers of two types: mature, halite dominant, and immature, clastic dominant. The estimate of elemental resources in these salars depends on a detailed knowledge of aquifer geometry, porosity, and brine grade. The geometry of the aquifers can be evaluated by classical geophysical and drilling techniques, but because the resource is a fluid, with the attendant problems of in-aquifer mixing and reorganization, existing codes for filing resource and reserve estimates need modification. Total porosity is relatively straightforward to measure, but effective porosity and specific yield, which are required to estimate the resource, are more difficult. Recovery factors are low compared with most metalliferous and industrial mineral deposits due to reliance on pumping of the brine from wells for extraction. These and related issues lead us to believe that modifications to the existing standards for reporting mineral resources and reserves are required for these prospects. DEWEY : 553 ISSN : 0361-0128 En ligne : http://econgeol.geoscienceworld.org/content/106/7/1225.abstract [article] The evaluation of brine prospects and the requirement for modifications to filing standards [texte imprimé] / John Houston, Auteur ; Andrew Butcher, Auteur ; Peter Ehren, Auteur . - 2011 . - pp. 1225-1239. Economic geology Langues : Anglais (eng) in Economic geology > Vol. 106 N° 7 (Novembre 2011) . - pp. 1225-1239 Mots-clés : Brine  prospects  Lithium  exploration Index. décimale : 553 Géologie économique. Minérographie. Minéraux. Formation et gisements de minerais Résumé : The recent increase in demand for lithium has led to the development of new brine prospects, particularly in the Central Andes. The brines are hosted in closed basin aquifers of two types: mature, halite dominant, and immature, clastic dominant. The estimate of elemental resources in these salars depends on a detailed knowledge of aquifer geometry, porosity, and brine grade. The geometry of the aquifers can be evaluated by classical geophysical and drilling techniques, but because the resource is a fluid, with the attendant problems of in-aquifer mixing and reorganization, existing codes for filing resource and reserve estimates need modification. Total porosity is relatively straightforward to measure, but effective porosity and specific yield, which are required to estimate the resource, are more difficult. Recovery factors are low compared with most metalliferous and industrial mineral deposits due to reliance on pumping of the brine from wells for extraction. These and related issues lead us to believe that modifications to the existing standards for reporting mineral resources and reserves are required for these prospects. DEWEY : 553 ISSN : 0361-0128 En ligne : http://econgeol.geoscienceworld.org/content/106/7/1225.abstract