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Open AccessArticle

Stochastic Modeling of Chemical Compounds in a Limestone Deposit by Unlocking the Complexity in Bivariate Relationships

School of Mining and Geosciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan
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Minerals 2019, 9(11), 683; https://doi.org/10.3390/min9110683
Received: 12 October 2019 / Revised: 1 November 2019 / Accepted: 2 November 2019 / Published: 4 November 2019
(This article belongs to the Special Issue Novel Methods and Applications for Mineral Exploration)
Modeling multivariate variables with complexity in a cross-correlation structure is always applicable to mineral resource evaluation and exploration in multi-element deposits. However, the geostatistical algorithm for such modeling is usually challenging. In this respect, projection pursuit multivariate transform (PPMT), which can successfully handle the complexity of interest in bivariate relationships, may be particularly useful. This work presents an algorithm for combining projection pursuit multivariate transform (PPMT) with a conventional (co)-simulation technique where spatial dependency among variables can be defined by a linear model of co-regionalization (LMC). This algorithm is examined by one real case study in a limestone deposit in the south of Kazakhstan, in which four chemical compounds (CaO, Al2O3, Fe2O3, and SiO2) with complexity in bivariate relationships are analyzed and 100 realizations are produced for each variable. To show the effectiveness of the proposed algorithm, the outputs (realizations) are statistically examined and the results show that this methodology is legitimate for reproduction of original mean, variance, and complex cross-correlation among the variables and can be employed for further processes. Then, the applicability of the concept is demonstrated on a workflow to classify this limestone deposit as measured, indicated, or inferred based on Joint Ore Reserves Committee (JORC) code. The categorization is carried out based on two zone definitions, geological, and mining units.
Keywords: mineral resource classification; JORC code; limestone deposit; project pursuit multivariate transform; (co)-simulation mineral resource classification; JORC code; limestone deposit; project pursuit multivariate transform; (co)-simulation
MDPI and ACS Style

Battalgazy, N.; Madani, N. Stochastic Modeling of Chemical Compounds in a Limestone Deposit by Unlocking the Complexity in Bivariate Relationships. Minerals 2019, 9, 683.

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