Geostatistical Modelling of a High-grade Iron Ore Deposit

Abstract We stated and solved three successive problems concerning automatization of geological mapping using the case of the Bolshetroitskoe high-grade iron ore deposit in weathered crust of Banded Iron Formation (Kursk Magnetic Anomaly, Belgorod Region, Russia). (1) Selecting a classification (clustering) method of geochemical data without reference sampling, i.e., solution of an “unsupervised clustering task”. We developed 5 rock classifications based on different principles, i.e., classification by visual description, by distribution of economic component (Fe2O3), by cluster analysis of raw data and centered log-ratio transformation of the raw data, and by artificial neural network (Kohonnen’s self-organized map). (2) Non-parametric comparison of quality of the classifications and revealing the best one. (3) Automatic 3D geological mapping in accordance with the best classification. The developed approach of automatic 3D geological mapping seems to be rather simple and plausible.

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The Bélinga Iron Ore Deposit (~2.8 Ga), NE-Gabon: Reactualization and New Interpretations on Crests

European Scientific Journal ESJ ◽

10.19044/esj.2017.v13n24p307 ◽

2017 ◽

Vol 13 (24) ◽

pp. 307

Author(s):

Stévy Retonda Kondja ◽

Simplice Marin Ndong Ondo ◽

Ambroise Edou Minko ◽

Francis Mayaga Mikolo

Keyword(s):

Iron Ore ◽

High Grade ◽

Ore Deposit ◽

Tectonic Events ◽

Iron Ore Deposit

The Bélinga iron ore deposit is the biggest iron ore situated in NEGabon. Very little is known about that iron ore and available data are sometimes incompatible. We revisited documents that evoke the deposit to reactualize and propose new interpretations. The Bélinga iron ore deposit is composed of thirteen (13) N-S mineralized crests that underwent 3 tectonic events, folding (D1), fracture (D2) and folding (D3). The ore is subdivided into four main categories which are blue and yellow ores, hematitic phyllites and enriched itabirites, with variable amounts of canga. The estimated reserves at Bélinga are ~384 Mt of high grade ore (Fe > 60% and P < 0.09%), and more than 1 Gt by considering an iron ore with Fe > 50% and P < 0.18%.

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History and Current State of Mining in the Kryvyi Rih Iron Ore Deposit

10.5772/intechopen.96120 ◽

2021 ◽

Author(s):

Mykola Stupnik ◽

Volodymyr Shatokha

Keyword(s):

Iron Ore ◽

Mineralogical Composition ◽

High Grade ◽

Ore Deposit ◽

Iron And Steel ◽

Current State ◽

Iron Ore Deposit ◽

Main Basis ◽

Processing Techniques ◽

Iron Ore Concentrate

In 2021 one of the world’s largest iron ore deposit in Kryvyi Rih (Ukraine) celebrates 140 years of its exploitation history. During the whole period of its existence the deposit has played and continues to play an important role in the development of Ukraine’s economy, being the main basis of its iron and steel industry. More than 6 billion tons of marketable iron ore extracted during this period and some 20 billion tons of waste rock has been mined. The deposit constitutes 82% of Ukraine’s iron ore output making the country the 7th biggest producer and 5th biggest iron ore exporter with value of USD 4 billion in 2019. In this chapter the historic aspects of deposit’s development and current state of its exploration are analyzed, including processing techniques employed to produce high grade iron ore concentrate, sinter and pellets. Characteristics of iron ores’ mineralogical composition and the features of the deposit’s geological genesis are also presented. Special attention is paid to the ongoing and planned modernization and deployment of innovative technologies aimed to enhance the competitiveness and to reduce environmental footprint of exploration.

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