Karst bauxite deposits in the North Dalmatian piggyback basin (NDPGB) are a part of the Mediterranean bauxite belt, which is the largest European bauxite deposit zone; however, there is a general lack of information regarding the genesis, age, and precursor of the bauxite deposits in this region. In this study, we combined detrital zircon UPb geochronology with compositional, mineralogical ...
Mineral genesis and oreforming process. Three stages of bauxite formation are recognized based on the mineralogy of studied samples: (1) weathering of regional sedimentary strata; (2) bauxite deposition; (3) second exposure of previously deposited bauxite caused by paleouplift.
the process of bauxite deposition in Masatdaqqi region of Turkey. ... The genesis of bauxite is closely related to carbonate or mafic basement and controlled by lithofacies paleogeography ...
Ore genesis theories are dependent on the mineral or commodity. Ore genesis theories generally involve three components: source, transport or conduit, and trap. This also applies to the petroleum industry, which was first to use this methodology. Source is required because metal must come from somewhere, and be liberated by some process.
The upper Permian Heshan Formation in Pingguo, Guangxi, China, is strongly enriched in lithium (Li) and niobium (Nb). The lower bauxite layer contains wt.%Nb2O5 (averaging wt.%), and the overlying clay rock layer contains wt.% Li2O (averaging wt.%), both of which exceed the cutoff grades for independent Li and Nb deposits and are therefore highly prospective ...
Commercial utilization of highsulfur diasporic bauxite is challenging because of the hazards of sulfur to the Bayer process. This article discusses a case study of producing alumina from high ...
Croatian bauxites are long known for their chemical and physical diversity arisen from their characteristic origin and emplacement within the area of the AdriaticDinaric carbonate platform (ADCP). They include eight horizons spanning the period between the Upper Triassic (Carnian) and the Miocene, formed on subaerially exposed platform paleoenvironments. The bauxite genesis is recorded in ...
Its process continues for a sufficient time and weathering products that are avoided from erosion will produce lateritic deposits. Bauxite can be formed from lateritic processes. Bauxite genesis is closely related to the original rock, formation process, and geological environment of its formation. The dominant bauxite thickness is found in ...
The electrons in the current attach to oxygen and hydrogen, the other elements in . bauxite, leaving the aluminum. Ore Genesis. Earth contains a finite amount of ore. Ore genesis, the process by which a deposit of ore is created, is estimated to take millions of years.
As for karst type bauxite, Mongelli, 1997, Öztürk et al., 2002 studied the genesis of the bauxite formation in the southern Aplian block in Italy and in Taurides, Turkey respectively and Temur and Kansun (2006) explained the process of bauxite deposition in Masatdaqqi region of Turkey.
The genesis of the Quaternary bauxites is a unique process that involved not only the formation of bauxite but also the renovation of karst topography 12.
Bauxite is a sedimentary rock with a relatively high aluminium content. It is the world's main source of aluminium and gallium. ... Prior to the invention of this process, and prior to the Deville process, aluminium ore was refined by heating ore along with elemental sodium or potassium in a vacuum. The method was complicated and consumed ...
This pattern of critical metal enrichment reflects a threestage genesis of bauxite linked to in situ weathering and bauxitization, which provide insights into the weathering history of other ...
The ICPMSDataCal program (Liu et al., 2008, Hou et al., 2009) was used to process the data to determine the UPb ages, and then, the Isoplot program was used to draw the concordia diagrams and calculate the weighted mean ... Implications for the regional tectonic evolution and bauxite genesis. Journal of Asian Earth Sciences., 98 (2015), pp ...
Bauxite (Fig. ) is formed by surface weathering of clay rocks around the tropical region and composer of aluminum oxide (Al (OH) 3 ). It contains 15%25% aluminum and only ore used for commercial extraction for aluminum. The bauxite occurs as nearsurface layers and usually mixed with clay minerals, iron oxide, and titanium dioxide.
This process, related to the forebulge uplift at the latest stages of Alpine orogenesis, ... Until recently, the issues of bauxite genesis and its relation to the adjacent karst palaeoenvironment and its tectonostratigraphic constraints in Croatia have been largely underestimated. They were treated earlier in the context of paleoclimate ...
1 Citations Part of the Springer Series in Materials Science book series (SSMATERIALS,volume 320) Abstract In this chapter the Authors summarize the typical features of bauxite which are believed to play roles in mining, beneficiation and mainly in alumina processing, that is, the industrial value of the raw material.
The Maochang paleokarstic bauxite deposit, located at the middle Yangtze Block, is the largest concealed bauxite deposit in Guizhou Province, southwest China. It is characterized by high sulfur contents (up to wt%) in bauxites and the presence of pyrite layers with thicknesses of m in the lower and upper zones of the bauxite ...
We conducted geological, mineralogical, δ 34 S pyrite, and insitu diaspore trace element analyses on the BaodeXingxian large bauxite deposit in the northern NCC, aiming to clarify the diasporeforming mechanism and explore the genesis of bauxite. Generally, bauxites in northern NCC contains three layers from bottom to top: Febearing ...
Chemical analyses of the rocks in the laterite profiles indicate that silica, bases from the Deccan Trap basalts were selectively removed during the weathering, resulting in the concentration of...
The process of extracting aluminum from bauxite involves crushing and refining the mineral to produce alumina, which is then used to produce aluminum metal. The global demand for aluminum has driven the growth of the bauxite industry, with major bauxiteproducing countries including Australia, Guinea, Brazil, and China.
A comprehensive understanding of the genesis and characteristics of bauxite deposits is hence essential. In this study, Machine learning methods (Random Forest and Logistic Regression) are applied to improve the understanding of Tethyan bauxite formation. Our research reveals that the TiO 2 content in Tethyan bauxites is related to their ...
Aluminum ore, also known as bauxite, is a naturally occurring mineral rock that contains aluminum in the form of aluminum oxide (Al2O3) mixed with various impurities. Bauxite is the primary source of aluminum, which is one of the most abundant elements in the Earth's crust, comprising about 8% by weight. Bauxite.
We conducted geological, mineralogical, δ 34 S pyrite, and insitu diaspore trace element analyses on the BaodeXingxian large bauxite deposit in the northern NCC, aiming to clarify the diasporeforming mechanism and explore the genesis of bauxite. Generally, bauxites in northern NCC contains three layers from bottom to top: Febearing ...
However, there are actually two types of bauxites. The genesis of only one of them can be adequately explained by the lateritization process. Lateritization usually means that aluminumbearing igneous rocks (like granite) are slowly weathering to clay minerals, which are then altered to aluminum hydroxides by continuous leaching of silica.
Bauxite residue (red mud), an alkaline, saline bauxite processing waste, is mainly produced by the Bayer process in which alumina is extracted from bauxite (Xue et al. 2015).The global inventory of bauxite residue reached an estimated billion tons in 2014 and is predicted to increase by 120 million tons per annum (Klauber et al. 2011).Globally, China is one of the largest producers of ...
This process has been repeated several times with maximum distribution throughout the profile due to environmental changes, including periodic fluctuations in the groundwater level. ... aiming to clarify the diasporeforming mechanism and explore the genesis of bauxite. Generally, bauxites in northern NCC contains three layers from bottom to ...
Karst bauxite is a major source of aluminum and contains high concentrations of trace elements such as Li, Ga, Sc, and rare earth elements (REEs). It is regarded as a potential nonconventional REE source due to the increasing demand for REEs. This study provides new mineralogical and geochemical evidence of a Lindai bauxite deposit in central Guizhou Province, aiming to analyze the genesis of ...
Bauxite is the principal ore of aluminum. Bauxites vary physically according to the origin and geologic history of their deposits: some deposits are soft, easily crushed, and structureless; some are hard, dense, and pisolitic,
In this study, the Taiping bauxite deposit, a representative large deposit in this area, was selected to carry out detailed mineral microanalysis and pyrite sulfur isotope analysis to further understand the metallogenic process of bauxite in this region. Taiping bauxite contains two layers: the lower bauxite layer and the upper claystone layer.
Geology, geochemistry, and genesis of REY minerals of the late Cretaceous karst bauxite deposits, Zagros Simply Folded Belt, SW Iran: Constraints on the oreforming process F. Ahmadnejad G. Mongelli Geology
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