Volume 13 (2022)
Volume 12 (2021)
Volume 11 (2020)
Volume 10 (2019)
Volume 9 (2018)
Volume 8 (2017)
Volume 7 (2016)
Volume 6 (2015)
Volume 5 (2014)
Volume 4 (2013)
Volume 3 (2012)
Volume 2 (2011)
Volume 1 (2010)
Adaptive Multi-Size Block Modeling for Mineral Resources and Ore Reserves Evaluation

F. Khorram; O. Asghari; H. Memarian; A. Hoseein Morshedy; X. M. Emery

Volume 12, Issue 2 , April 2021, , Pages 339-350


  The key input parameters for mine planning and all subsequent mining activities is based on the block models. The block size should take into account for the geological heterogeneity and the grade variability across the deposit. Providing grade models of smaller blocks is more complex and costly than ...  Read More

An Optimum Selection of Simulated Geological Models by Multi-Point Geostatistics and Multi-Criteria Decision-Making Approaches; a Case Study in Sungun Porphyry-Cu deposit, Iran

S. Talesh Hosseini; O. Asghari; Seyed A. Torabi; M. Abedi

Volume 11, Issue 2 , April 2020, , Pages 481-503


  An accurate modeling of sophisticated geological units has a substantial impact on designing a mine extraction plan. Geostatistical simulation approaches, via defining a variogram model or incorporating a training image (TI), can tackle the construction of various geological units when a sparse pattern ...  Read More

Geostatistical and multi-fractal modeling of geological and geophysical characteristics in Ghalandar Skarn-Porphyry Cu Deposit, Iran

S. Salarian; O. Asghari; M. Abedi; S. K. Alilou

Volume 10, Issue 4 , October 2019, , Pages 1061-1081


  This work aims at figuring out the spatial relationships between the geophysical and geological models in a case study pertaining to copper-sulfide mineralization through an integrated 3D analysis of favorable target. The Ghalandar Skarn-Porphyry Cu Deposit, which is located in NW Iran, is selected for ...  Read More

Assessment of an ore body internal dilution based on multivariate geostatistical simulation using exploratory drill hole data

I. Masoumi; Gh.R. Kamali; O. Asghari

Volume 10, Issue 1 , January 2019, , Pages 271-286


  Dilution can best be defined as the proportion of waste tonnage to the total weight of ore and waste in each block. Predicting the internal dilution based on geological boundaries of waste and ore in each block can help engineers to develop more reliable long-term planning designs in mining activities. ...  Read More

Investigation of linear and non-linear estimation methods in highly-skewed gold distribution

H. Rahimi; O. Asghari; F. Hajizadeh; F. Meysami

Volume 9, Issue 4 , October 2018, , Pages 967-979


  The purpose of this work is to compare the linear and non-linear kriging methods in the mineral resource estimation of the Qolqoleh gold deposit in Saqqez, NW Iran. Considering the fact that the gold distribution is positively skewed and has a significant difference with a normal curve, a geostatistical ...  Read More

Spatial modelling of zonality elements based on compositional nature of geochemical data using geostatistical approach: a case study of Baghqloom area, Iran

S. Talesh Hosseini; O. Asghari; Seyed R. Ghavami Riabi

Volume 9, Issue 1 , January 2018, , Pages 153-167


  Due to the existence of a constant sum of constraints, the geochemical data is presented as the compositional data that has a closed number system. A closed number system is a dataset that includes several variables. The summation value of variables is constant, being equal to one. By calculating the ...  Read More

Estimation of groundwater inflow situation using fuzzy logic: a case study (Beheshtabad water conveying tunnel, Iran)

M. Doustmohammadi; A. Jafari; O. Asghari

Volume 7, Issue 2 , July 2016, , Pages 229-238


  Water inflow is one of the most important challenges in the underground excavations. In addition to inducing working conditions and environmental problems, it decreases the stability and quality of the surrounding rocks. The direct method of measuring rock mass hydraulic conductivity consists of drilling ...  Read More

Geostatistical simulation of dyke systems in Sungun porphyry copper deposit, Iran

Omid Asghari

Volume 6, Issue 1 , January 2015, , Pages 1-10


  Post-mineralization activities may cause difficulties in the process of ore modeling in porphyry deposits. Sungun, NW Iran, is one of the porphyry copper deposits, in which dyke intrusions have made ore modeling more complicated than expected. Among different kinds of dykes, two types were chosen and ...  Read More

On the reduction of the ordinary kriging smoothing effect

H. Rezaee; O. Asghari; J.K. Yamamoto

Volume 2, Issue 2 , July 2011, , Pages 102-117


  A simple but novel and applicable approach is proposed to solve the problem of smoothing effect of ordinary kriging estimate which is widely used in mining and earth sciences. It is based on transformation equation in which Z scores are derived from ordinary kriging estimates and then rescaled by the ...  Read More