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Joint Simulation of Grade and Rock Type in a Stratabound Copper Deposit

Authordc.contributor.authorMaleki, Mohammad 
Authordc.contributor.authorEmery, Xavier 
Cita de ítemdc.identifier.citationMath Geosci (2015) 47:471–495en_US
Identifierdc.identifier.otherDOI: 10.1007/s11004-014-9556-8
General notedc.descriptionArtículo de publicación ISIen_US
Abstractdc.description.abstractThis work deals with the joint simulation of copper grade (as a continuous regionalized variable) and rock type (as a categorical variable) in Lince–Estefanía deposit, located in northern Chile. The region under study is heterogeneous, containing three main rock types (intrusive, andesite and breccia bodies) with different copper grade distributions. To perform joint simulation, themulti-Gaussian and pluri- Gaussian models are used in a combined form. To this end, three auxiliary Gaussian random fields are considered, one for simulating copper grade, up to a monotonic transformation, and two for simulating rock types according to a given truncation rule. Furthermore, the dependence between copper grade and rock types is reproduced by considering cross correlations between these Gaussian random fields. To investigate the benefits of the joint simulation algorithm, copper grade and rock types are also simulated by the traditional cascade approach and the results are compared. It is shown that the cascade approach produces hard boundaries, that is, abrupt transitions of copper grades when crossing rock-type boundaries, a condition that does not exist in the study area according to the contact analysis held on the available data. In contrast, the joint simulation approach produces gradual transitions of the copper grade near the rock-type boundaries and is more suited to the actual data.en_US
Publisherdc.publisherInternational Association for Mathematical Geosciencesen_US
Type of licensedc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
Link to Licensedc.rights.uri*
Keywordsdc.subjectContact analysisen_US
Keywordsdc.subjectMulti-Gaussian modelen_US
Keywordsdc.subjectPluriGaussian modelen_US
Keywordsdc.subjectJoint modelingen_US
Keywordsdc.subjectGeological heterogeneityen_US
Títulodc.titleJoint Simulation of Grade and Rock Type in a Stratabound Copper Depositen_US
Document typedc.typeArtículo de revistaen_US

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Atribución-NoComercial-SinDerivadas 3.0 Chile
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 Chile