Geostatistical analysis of an Iron Ore Deposit

Overview

This data frame consists of 1243 rows and 8 columns. The column names are

|---East (X)
|---North (Y)
|---Elevation (Z)
|---Fe (%)
|---AL2O3 (%)
|---Mn (%)
|---P (%)
|---Lithology

• Fe (%) is the concentration of Iron in the deposit.
• AL2O3 (%) is the concentration of Aluminium Oxide in the deposit.
• Mn (%) is the concentration of Manganese in the deposit.
• P (%) is the concentration of Phosphorous in the deposit.
• Lithology is a categorical variable (1 or 2).

There were several rows with partial or completely missing values (replaced by -99). We removed such rows and the cleaned data frame consists of 607 rows and 8 columns. We noticed there were repeated data collected at the same East (X) and North (Y) but at varying Elevations (Z). We decided to merge such rows into a single row by averaging the values for the numerical variable and replace the mode value for the categorical variable (Lithology). The merged data frame consists of 181 rows and 8 columns.

Descriptive Statistics

• Mean, five-number summary, standard deviation etc for Fe concentration. DONE.

Correlation Matrix

Frequency Distributions and Cross Tables

• Frequency and relative frequency table for Fe Concentration. DONE

Exploratory Data Analysis

• Histogram for Fe Concentration. DONE

Variogram

Variogram Parameters

Parameter	Definition
sill	Limit of the variogram tending to infinity lag distances.
range	The distance in which the difference of the variogram from the sill becomes negligible.
nugget	The height of the jump of the semivariogram at the discontinuity at the origin.

Variogram Models

Model	Definition
Exp	Exponential.
Sph	Spherical.
Gau	Gaussian.

Kriging

Data Source

Dr. Nasser Madani.

Collaborators

Dr. Nasser Madani, Dr. Emmanouil Varouchakis and Dr. Ashok Krishnamurthy.

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