About
Contact
Help
Sending publications
How to publish
Advanced Search
View Item 
  •   Home
  • Facultad de Ciencias Físicas y Matemáticas
  • Artículos de revistas
  • View Item
  •   Home
  • Facultad de Ciencias Físicas y Matemáticas
  • Artículos de revistas
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse byCommunities and CollectionsDateAuthorsTitlesSubjectsThis CollectionDateAuthorsTitlesSubjects

My Account

Login to my accountRegister
Biblioteca Digital - Universidad de Chile
Revistas Chilenas
Repositorios Latinoamericanos
Tesis LatinoAmericanas
Tesis chilenas
Related linksRegistry of Open Access RepositoriesOpenDOARGoogle scholarCOREBASE
My Account
Login to my accountRegister

Incorporating the uncertainty in geological boundaries into mineral resources evaluation

Artículo
Thumbnail
Open/Download
file_5710.txt (0bytes)
Publication date
2007
Metadata
Show full item record
Cómo citar
Emery, Xavier
Cómo citar
Incorporating the uncertainty in geological boundaries into mineral resources evaluation
.
Copiar
Cerrar

Author
  • Emery, Xavier;
  • González, Karina;
Abstract
Geological modelling is a key step prior to grade estimation in a mineral deposit and consists of a deterministic partitioning of the deposit into sub-domains called 'geological units', each with relatively homogeneous properties. Although this partitioning allows a better characterisation of the grade distribution in space, it fails at accounting for the uncertainty in the layout of the geological unit boundaries. This paper proposes a methodology for incorporating the geological uncertainty into mineral resources evaluation, through an application to a porphyry copper deposit located in the Central Andes, Chile. Geostatistical simulations are used to obtain a probabilistic description of three lithotypes in this deposit, viz.: granodiorife, tourmaline breccia and other breccias. Two kinds of conditioning information are considered for constraining the lithotype realisations: hard data available at exploration drill hole samples and soft information on geological continuity assumed by the mining geologist, consisting of interval constraints on the probabilities of occurrence of the lithotypes at locations where drill holes are scarce. The conditional realisations so made are used to derive the posterior probabilities of occurrence of the lithotypes over the de posit. The mineral resource model is finally obtained by weighting the copper grade estimates associated with the different lithotypes by their probabilities of occurrence. The proposed approach allows one to construct a grade model that incorporates the uncertainty in the rock types, avoiding artefacts caused by the assumption of deterministic boundaries between high-graded and low-graded lithotypes, and is shown to improve the grade estimates near the lithotype boundaries.
General note
Publicación ISI
Identifier
URI: https://repositorio.uchile.cl/handle/2250/124724
Quote Item
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA Vol. 69 JAN 2007 1 29-38
Collections
  • Artículos de revistas
xmlui.footer.title
31 participating institutions
More than 73,000 publications
More than 110,000 topics
More than 75,000 authors
Published in the repository
  • How to publish
  • Definitions
  • Copyright
  • Frequent questions
Documents
  • Dating Guide
  • Thesis authorization
  • Document authorization
  • How to prepare a thesis (PDF)
Services
  • Digital library
  • Chilean academic journals portal
  • Latin American Repository Network
  • Latin American theses
  • Chilean theses
Dirección de Servicios de Información y Bibliotecas (SISIB)
Universidad de Chile

© 2020 DSpace
  • Access my account