Textural complications of banded iron formation and the
2023.9.13 Introduction. Banded iron formations “BIFs” are sedimentary iron ores formed, throughout the Archean and Proterozoic eons (~ 3800–543 Ma), by the
Read More
Geochemical discrimination among different types of banded iron ...
2021.9.1 Banded iron formations (BIFs) represent purely sedimentary geological environment, show macrobandings (1 m–100 m), mesobandings (1 mm–10 cm),
Read More
Geochemical Constraints on the Origin of Banded Iron
2018.3.30 Abstract. Banded iron formations (BIFs) are the most significant source of iron in the world. In this study, we report petrographic and geochemical data of the BIF
Read More
BIFs的形成及其铁氧化机制研究进展与展望
2021.10.27 条带状铁建造 (banded iron formations, BIFs)是早前寒武纪 (3.8~1.8 Ga)缺氧古海洋中大规模Fe (II)氧化形成的一类富铁沉积岩,具有典型的硅质层与铁质层互层的
Read More
Hydrogen reduction of low-grade banded iron ore
2022.9.1 The current study investigates the potential of low-grade banded iron ore for the recovery of iron values. The ore containing 37 % Fe with hematite and quartzite
Read More
RESEARCH FOCUS: The life and times of banded iron formations
2015.12.1 Banded iron formations (BIFs) have been at the center of many debates in geology, especially regarding the early (i.e., Archean and Paleoproterozoic) Earth and its
Read More
Genesis of the Neoproterozoic-Early Cambrian banded iron
2019.4.15 Fe ores of this type are characterized by banded Fe- and Si-rich layers. Iron-rich layers mainly consist of magnetite with minor martite, while the Si-rich layers are
Read More
Banded iron formation to high-grade iron ore: a critical
2012.12.13 Laterite ( sensu lato) is a soil formation in which primary textures are destroyed and is underlain by a pallid zone showing the preservation of chert and the
Read More
Banded iron formation to iron ore: A record of the evolution
2013.2.1 Banded iron formations (BIF) are the protolith to most of the world’s largest iron ore deposits. Previous hypogene genetic models for Paleoproterozoic “Lake
Read More
(PDF) Banded iron formation to high-grade iron
2012.12.1 Banded iron formation to high-grade iron ore: A critical review of supergene enrichment models. Australian Journal of Earth Sciences 59 (8):1105-1125. Authors: Desmond F. Lascelles....
Read More
Archean banded iron formations of India - ScienceDirect
2020.2.1 Archean banded iron formations (BIFs) are important lithologies for understanding the early Earth processes. Greenstone belts in the four Archean cratonic nucleii of peninsular India, namely, Singhbhum, Bastar, Dharwar, and Bundelkhand host BIF units that can be important candidates for case studies. The BIFs in these greenstone
Read More
Textural complications of banded iron formation and the
2023.9.13 Banded iron formations “BIFs” are sedimentary iron ores formed, throughout the Archean and Proterozoic eons (~ 3800–543 Ma), by the deposition of iron minerals-rich bands rhythmically ...
Read More
Banded Iron Formation - an overview ScienceDirect Topics
The Atmosphere and Hydrosphere. Kent C. Condie, in Earth as an Evolving Planetary System (Third Edition), 2016 Banded Iron Formation. Banded iron formation or BIF is a chemical sediment, typically thin-bedded or laminated with > 15% iron of sedimentary origin (Figure 8.6).BIF has a very distinct distribution with time (Figure 8.25).It is found in minor
Read More
Banded iron formation to iron ore: A record of the evolution
2013.2.1 Genesis of High-Grade Iron Ores of the Archean Iron Ore Group around Noamundi, India Economic Geology Oxygen Isotope Compositions of Iron Oxides from High-Grade BIF-Hosted Iron Ore Deposits of the Central Hamersley Province, Western Australia: Constraints on the Evolution of Hydrothermal Fluids
Read More
Iron isotope and REE+Y composition of the Cauê banded iron
2016.4.14 The Minas Supergroup banded iron formations (BIFs) of the Brazilian Quadrilátero Ferrífero (QF) mineral province experienced multiple deformational events synchronous with hypogene mineralization, which resulted in the metamorphism of BIFs to itabirites and their upgrade to high-grade iron ore. Here, we present rare earth element
Read More
1 IRON ORE DEPOSITS OF INDIA - INFLIBNET Centre
2023.8.28 These rocks are folded and occur as a series of ridges capped with thick deposits of hematite ore. Alternate bands of hematite and jasper (BHJ) occur. Iron ores exhibit a variety of textures and contain varying proportions of iron as follows:-. Massive, compact ores commonly capping ridges contain 66% to 70 % iron.
Read More
Banded Iron Formation SpringerLink
2023.3.16 Banded iron formations (BIFs) comprise the largest iron resource on Earth. They formed throughout much of the Precambrian (∼3800–543 Ma), reaching their maximum abundance between 2700 and 2400 Ma ago. ... The formation of these high-grade iron ores took place long after deposition, likely during the Phanerozoic, when the
Read More
Primary sedimentary structures in the banded iron-formation
1977.1.1 The high-grade (>62 wt% Fe) iron ores of Kiriburu-Meghahatuburu deposit (KMID) of the Singhbhum-Orissa region, eastern India are mainly hosted by banded hematite Jasper (BHJ) and shale. These BIFs belong to oxide facies (hematite ± martite) iron formations without sulfidic/carbonitic signatures.
Read More
Banded iron formation to high-grade iron ore: a critical
2012.12.13 All the major worldwide direct-shipping iron ore deposits associated with banded iron formations (BIF) are characteristically deeply weathered. They extend to considerable depths below the water table and show well-preserved primary structures and textures, but characteristically most deposits contain no evidence of chert bands being
Read More
Geology and geochemistry of the Macheng Algoma-type banded iron ...
2015.12.1 This kind of banded iron ores is of higher grade which can reach a TFe grade of >50%. Download : Download full-size image; Fig. 4. Drill core photographs of different Macheng iron ores in the Macheng iron deposit. (a) with gneissic structure, (b) with striated structure, (c) with alternating quartz, magnetite and tremolite bands, (d and e)
Read More
Mineralogy and geochemistry of banded iron formation
2019.4.9 Mineralogy and geochemistry of banded iron formation and iron ores from eastern India with implications on their genesis Subrata Roy1,∗ and A S Venkatesh2 1MNP Division, National Metallurgical Laboratory, Jamshedpur, India. 2Department of Applied Geology, Indian School of Mines University, Dhanbad, India. ∗e-mail:
Read More
Meso- and Neoarchean Banded Iron Formations and
2017.11.1 The Anshan-Benxi area in the North China craton has numerous occurrences of Algoma-type banded iron formations (BIFs) with subordinate high-grade magnetite ores. These ores provide insight into iron metallogenesis and early evolution of the North China craton. In this paper, we present Sm-Nd-Fe-O isotope, mineralogical,
Read More
Origin of Banded Iron Formations: Links with
2023.4.13 Banded iron-formations (BIFs) are marine chemical sedimentary rocks composed of siliceous and ferric materials, usually with typical thin layers or sheet structures. BIFs not only record a wealth of
Read More
Utilization of low-grade banded hematite jasper ores: recovery of iron ...
2018.6.19 A novel approach for the complete utilization of a low-grade banded hematite jasper ore assaying ~ 47% Fe has been taken in order to address the issue of rapid consumption of high-grade iron ores and the rising concerns of waste disposal. The process includes the enrichment of Fe through reduction roasting followed by magnetic
Read More
Fe-Si-C isotope constraints on the genesis of iron ores in ...
2023.7.1 The Gongchangling iron deposit is an oxide-facies Algoma-type banded iron formation (BIF) and one of the most representative iron deposits in northeastern China. We present new data from petrological, whole-rock geochemical, and Fe-Si-O isotope compositional data from the Gongchangling BIFs to constrain the origin of ore-forming
Read More
Dynamics of oceanic iron prior to the Great Oxygenation Event
2019.1.15 The 2.4Ga Hotazel Formation is a cyclically interlayered sequence of banded iron formation (BIF) and manganese-rich sedimentary rock at the uppermost part of the Neoarchaean-Palaeoproterozoic Transvaal Supergroup in South Africa. It represents an unusual stratigraphic association in the context of the origin of BIF and the coevolution of
Read More
Mineralogical and microchemical methods for the
Semantic Scholar extracted view of "Mineralogical and microchemical methods for the characterization of high-grade banded iron formation-derived iron ore" by E. Ramanaidou et al. ... Maghemite in Brazilian Iron Ores: Quantification of the Magnetite-Maghemite Isomorphic Series by Χ-ray Diffraction and the Rietveld Method, and Confirmation by ...
Read More
Mineragraphic studies of iron ores of different hill
2017.11.9 Samples of iron ores collected from different mining areas of the schist belt have been subjected to ore microscopic studies. The ... E.A.Alexandrov,“The Precambrian banded iron for-mations of the Soviet Union ,” Econ.Geol, vol.68,pp.1035-1062,1973. [2] G.C.Amstutz., “Microscopy applied to mineral,” Co-lo.School Mines. vol
Read More
Iron Ore: Sedimentary Rock - Pictures, Definition More
Earth's most important iron ore deposits are found in sedimentary rocks. They formed from chemical reactions that combined iron and oxygen in marine and fresh waters. The two most important minerals in these deposits are iron oxides: hematite (Fe 2 O 3) and magnetite (Fe 3 O 4 ). These iron ores have been mined to produce almost every iron and ...
Read More
[PDF] Banded iron formation to iron ore: A record of the
2013.2.1 Banded iron formations (BIF) are the protolith to most of the world’s largest iron ore deposits. ... Deep-seated iron ores from banded-iron formation. R. C. Morris M. Thornber W. Ewers. Geology. Nature. 1980; Very large iron ore deposits have formed in many parts of the world, evidently by the supergene alteration of Precambrian banded
Read More
Geochemistry and Petrology of Some Proterozoic Banded Iron-Formations ...
2000.3.1 These banded iron-formation samples represent the best preserved, unweathered, and least altered iron-formation precursors to the major hematite-rich ore deposits of the region. Since the 17th century, the Quadrilátero Ferrífero has been recognized as a major gold- and iron-rich province, which has resulted in it being the best
Read More
Paleoproterozoic hydrothermal overprinting over
2024.1.21 These high-grade magnetite ores are generally accepted to be formed by replacement of banded iron formation (BIF) (∼30 wt% total Fe), but the mechanism of iron enrichment remains controversial. Here we report new O–S–B isotope data of BIFs, high-grade iron ores, and related altered wall rocks, from the Gongchangling i
Read More
On the Precambrian banded iron-formations and the manganese ores
The Precambrian banded iron-formations and the manganese ores of the Singhbhum region of eastern India occur within a sequence of predominantly volcanogenic metasediments (Iron Ore Supergroup) which occur around a central granitic platform. A review of the stratigraphy and tectonic history of these rocks indicates that they are made up of four ...
Read More
Microwave Processing of Banded Magnetite Quartzite Ore for Iron ...
2019.3.13 The effective utilization of low-grade banded iron ores is inevitable to meet India Steel Vision 2030 of producing 300 MT steel. In this study, banded magnetite quartzite iron ore (Fe ~ 41%) is physically beneficiated and microwave-treated followed by low-intensity magnetic separation. The appearance of massive random cracks during
Read More
Meso- and Neoarchean Banded Iron Formations and
2018.6.1 Sir: We congratulate Dai et al. (2017) for their paper that provides age constraints and a model for the origin of banded iron formation (BIF)-related high-grade magnetite ores within the Anshan-Benxi area of the North China craton. Significantly, their contribution (1) highlights the potential relationship between Archean episodic crustal
Read More
Utilization of low-grade banded hematite jasper ores: recovery of iron ...
2018.6.19 Abstract A novel approach for the complete utilization of a low-grade banded hematite jasper ore assaying ~ 47% Fe has been taken in order to address the issue of rapid consumption of high-grade iron ores and the rising concerns of waste disposal. The process includes the enrichment of Fe through reduction roasting followed by magnetic
Read More
(PDF) Structural, Mineralogical and Ore Grades of Banded Iron
2015.3.31 The iron ores of Tamil Nadu State, south India are mainly banded magnetite quartzite. Occurrences and distribution of these deposits significantly vary according to their geological structure and ...
Read More
Investigation of Microwave Exposure on Beneficiation of Low
2018.11.12 India’s steel vision of 2030 requires a huge amount of quality iron ore. The utilization of low-grade iron ores such as banded iron ores will play an important role to achieve the same production. The absence of alumina impurities in the banded hematite jasper (BHJ) ore provides it an edge over other low-grade iron ores. The conventional
Read More
Genesis of the Neoproterozoic-Early Cambrian banded iron
2019.4.15 Fe ores of this type are characterized by banded Fe- and Si-rich layers. Iron-rich layers mainly consist of magnetite with minor martite, while the Si-rich layers are composed mainly of quartz, with lesser amounts of calcite, magnetite, and martite. Martite is commonly found within the oxidized ores and locally replaces magnetite crystals.
Read More
Potential low-grade iron ore deposits in metamorphosed banded iron ...
Exploitation of low-grade iron ore would be quite unique in a South African context as South Africa is well endowed with high-grade iron ore resources. Low-grade iron ore, defined as containing between 20 and 47% iron, is thought to be the primary iron-bearing lithology from which most high-grade ore deposits formed, through different processes of enrichment.
Read More
