Integrated Geophysical Exploration for Iron Ore Deposit in …
An integrated geophysical exploration using Magnetic, Induced Polarization (IP) and Gamm-Ray Spectrometry methods were conducted for iron ore exploration in Meti Segeda locality, Omo …
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Traditional Steelmaking in Southwestern Ethiopia:
In Ethiopian steelmaking, three kinds of iron ore were mined, and the craftspeople were clearly able to select the most appropriate ore for a given project, without explicidy understanding the …
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Structural Control, Hydrothermal Alteration Zonation, and …
High-grade iron ore of the 4EE orebody of the 4E deposit (>200 Mt at 63.5 wt % Fe) occurs as a southerly dipping sheet within banded iron formation (BIF) of the Paleoproterozoic Dales Gorge and Joffre members of the Brockman Iron Formation. Structural reconstruction of the 4E deposit shows that reactivation of the 18E fault and development of the NW-striking, steeply …
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(PDF) Footprints: The Hydrothermal Alteration …
Generally, Pos2200 of normal muscovite ranges from 2200 to 2208 nm, and that for phengite (Si/Al ratio of >3) ranges from 2216 to 2228 nm (Velde, 1965;Post and Noble, 1993;Herrmann et al., 2001).
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APPLYING HYPERSPECTAL CORE IMAGING TO SEE VMS …
IMAGING TO SEE VMS ALTERATION ZONATION IN A NEW LIGHT. July 2020 Spectroscopy in Mineral Exploration: Satellite/Airborne Kokaly et al., 2015 ... amphiboles, iron oxides, and others. • A spectrum plots reflectance (%) versus wavelength (nm). Fundamentals of Spectroscopy ... •Potential to determine if there are local vectors to ore deposits.
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Geology, Mineral Paragenesis, and Sequence …
Bikilal iron ore deposit is a Kiruna-type magnetiteilmenite deposit in West Wollega Western Ethiopia. It is formed within syn-post tectonic intrusive gabbroic complex that intrudes the Precambrian gneiss.
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Alteration zonation and short wavelength infrared (SWIR
Previous research of the Honghai Cu-Zn deposit has focused on its ore geology, age and isotopic geochemistry (Mao et al., 2010, Mao, 2014, Mao et al., 2015, Mao et al., 2016, Deng et al., 2016, Deng et al., 2018), yet detailed studies on alteration mineralogy, alteration zonation, mineral paragenesis, SWIR and mineral chemistry are still absent ...
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[PDF] Spectral Alteration Zonation Based on Close Range …
Research on wall rock alteration is of great importance to the understanding and exploration of ore deposits. The microscopic changes of the same mineral in different alteration zones can provide information about the migration and enrichment of ore-forming elements. In this paper, a typical profile of a high-grade iron ore body in Gongg iron deposit was …
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Figure 14 from The structural setting and …
chapter 3: oxygen isotope compositions of iron oxides 29 from high-grade bif-hosted iron ore deposits of the central hamersley province,western australia: constraints on the evolution of hydrothermal fluids. chapter 4: structural control, …
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Alteration And Zonation Of Iron Ore In Ethiopia
Three types of iron occurrences including a magmatic iron (Fe–Ti type), banded iron formation (BIF) and secondary iron (lateritic) ore deposits have been reported in Ethiopia (Tadesse, …
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Structural controls of bedded iron ore in the Hamersley …
Structure is the most important control on the location of hematite deposits in the Hamersley Province in the Pilbara region of Western Australia. Unravelling the structural history of mineralised areas, however, is complex because the Province underwent three orogenic events, and three regional extension events followed the main episodes of compression. Steeply E to …
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Environments of advanced argillic alteration I. Mineral …
This genetic framework of environments of formation of advanced argillic alteration helps to interpret alteration mineralogy plus its morphology and zonation during exploration and assessment of ...
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(PDF) Economic Geology
of iron, whi ch is caused by organic acids derived from decaying vegetation. Laterite zonation is due to the effect of seasonal changes betw een dry and wet
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Structural control, hydrothermal alteration zonation, and …
High-grade iron ore of the 4EE orebody of the 4E deposit (>200 Mt at 63.5 wt % Fe) occurs as a southerly dipping sheet within banded iron formation (BIF) of the Paleoproterozoic Dales Gorge and ...
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Geology and mineral potential of Ethiopia: a note on …
Primary and placer gold deposits and occurrences have been reported from the Panafrican volcano-sedimentary sequence in Southern Ethiopia (Adola gold field), Western …
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The structural setting and hydrothermal alteration of BIF …
chapter 3: oxygen isotope compositions of iron oxides 29 from high-grade bif-hosted iron ore deposits of the central hamersley province,western australia: constraints on the evolution of hydrothermal fluids. ... structural control, hydrothermal alteration zonation 47 and fluid chemistry of concealed, bif-hosted high-grade 4ee iron ore body at ...
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Structure, alteration, and geochemistry of the Charlotte …
from a shoot of hessite-rich telluride ore, the distal equivalent of calaverite-rich ore in the Golden Mile (Mueller and Muhling 2013). The lode terminates at 120 m depth at a D3 (?) reverse fault (Feldtmann 1916). The Golden Dream Lode, mined over a strike of 180 m, is the only one located in altered greywacke of the Golden Mile Fault (Fig.2).
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Magnetic effects of hydrothermal alteration in porphyry copper and iron
Primary mineralogy, gangue minerals and ore assemblages are all affected. Iron oxides, oxyhydroxides and sulphates derive from decomposition of Fe-bearing sulphides. ... Alteration zonation model of a gold-rich porphyry copper system with maximal development of a biotite–magnetite assemblage in the potassic zone. There is no vertical ...
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Genesis and characteristics of lateritic iron deposit in Mai …
In Ethiopia, the most important primary iron ore deposits are associated with the upper successions of Precambrian rocks (Tadesse, 2009). Weathering and alteration of the …
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MAPPING THE MINERAL ZONATION AT THE ERNEST HENRY IRON …
Our mineral mapping approach shows that the hydrothermal alteration resulted in a characteristic zonation of minerals radiating outward from the pipe-shaped orebody. The mineral zonation is the result of a sequence of sodic alteration followed by potassic alteration, brecciation, and, finally, by hydrolytic (acid) alteration.
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Mineralization Styles, Alteration Mineralogy, and Sulfur …
102 alteration zone close to the massive ore body led early workers to suggest that these sulfides are a 103 result of epigenetic mineralization and were formed by the hydrothermal replacement of pre-
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Alteration mineralogy, characteristics and shortwave …
The ore body presents in vein-like structures, with mineralization associated with alunite-dickite alteration in the upper part and with dickite-sericite alteration in the lower part. Ore minerals consist of covellite, digenite, pyrite, chalcopyrite, tenantite and bornite. (Zhang et al., 1996). Previous studies have noted the development of ...
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Ethiopia Nears First Iron Ore Plant
Ethiopia Nears First Iron Ore Plant. The first private iron ore mining plant is to kick off in Mekaneselam, Wollo Zone in northcentral Ethiopia. Agodo YO is investing between USD150 and 200 million to install a medium-scale iron ore processing …
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Mineralogical and Isotopic Zonation in the Sur-Sur
The alteration types in the mining area, from deep to shallow, include an albite alteration zone, a biotite-albite alteration zone, a chlorite alteration zone and a sericite-pyrite alteration zone.
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(PDF) Epithermal ore deposits: First-order features relevant …
The dominant country-rock alteration of the deposit is silicification, advanced argillic alteration, chloritization, sericitization, and pyritization and the main ore mineral combination is pyrite ...
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Kun Song, Ende Wang, Yuzeng Yao, Jianfei Fu, Dahai Hao, …
The microscopic changes of the same mineral in different alteration zones can provide information about the migration and enrichment of ore-forming elements. In this paper, a typical profile of a high-grade iron ore body in Gongg iron deposit was investigated and sampled.
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Geology and Mineralogical Zonation of the Olympic Dam Iron …
It has been recognized for the past century that copper deposits, in common with those of many other metals, are heterogeneously concentrated in Earth's upper crust, resulting in areally restricted copper provinces that were generated during several discrete metallogenic epochs over time intervals of up to several hundred million years.
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Alteration and mineralization patterns in orogenic gold …
The compositional variations of ore fluids and host rocks have important controls on the development of iron-oxides and carbonaceous material. (4) The alteration halo is relatively restricted ...
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Structural control, hydrothermal alteration zonation, and …
High-grade iron ore of the 4EE orebody of the 4E deposit (>200 Mt at 63.5 wt % Fe) occurs as a southerly dipping sheet within banded iron formation (BIF) of the Paleoproterozoic Dales Gorge and Joffre members of the Brockman Iron Formation. Structural reconstruction of the 4E deposit shows that reactivation of the 18E fault and development of the NW-striking, steeply SW …
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Epithermal related hydrothermal alteration …
The mapping of hydrothermal alteration zones associated with mineralization is of paramount importance in searching for metal deposits. For this purpose, targeting alteration zones by analyzing airborne geophysical and satellite imagery …
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