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 ...
Geology, geochemistry, and genesis of REY minerals of the late Cretaceous karst bauxite deposits, Zagros Simply Folded Belt, SW : Constraints on the oreforming process F. Ahmadnejad G. Mongelli Geology
ADVERTISEMENT Bauxite Used for Aluminum Production Bauxite is the principal ore of aluminum. The first step in producing aluminum is to crush the bauxite and purify it using the Bayer Process. In the Bayer Process, the bauxite is washed in a hot solution of sodium hydroxide, which leaches aluminum from the bauxite.
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.
Geological aspects and lateritic bauxite deposit genesis process on the site is a very interesting research material. Based on field mapping, Gibsite is the bauxite formed with frame type is the result of weatherin sediment residue on the soil catena. The study area consists of rocks that form lateritisation overburden, soil laterite, iron cap ...
Geochemistry of the early Jurassic Soleiman Kandi karst bauxite deposit, IranoHimalayan belt, NW : Constraints on bauxite genesis and the distribution of critical raw materials. A. Abedini, G. Mongelli, M. Khosravi. Journal of Geochemical Exploration • 1 October 2022. View details in Scopus 13 citations.
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 ...
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.
The downward enrichment in REEs and Y to the bottom of the bauxite ore was probably due to the bioleaching process postdeposition (Laskou and EconomouEliopoulos, 2013; Liu et al., 2020a). ... Carboniferous sequences in the southwestern North China Craton: implications for the regional tectonic evolution and bauxite genesis.
However, the genesis of many bauxite occurrences remains insufficiently explained and untouched by modern models and techniques. The karst bauxite of the Unterlaussa mining district represents the most significant occurrence in Austria and is a prominent member of the European karst bauxites.
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 purpose of present work was to provide mineralogical insight into the rare earth element (REE) phases in bauxite residue to improve REE recovering technologies. Experimental work was performed by electron probe microanalysis with energy dispersive as well as wavelength dispersive spectroscopy and transmission electron microscopy. REEs are found as discrete mineral particles in bauxite ...
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 ...
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 ...
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 ...
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 ...
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 ...
The bauxite genesis process relies on selective leaching of minerals as water percolates from the surface down through a mineralization zone to a drainage system below. Because of this, the resulting bauxite profile is not uniform, but forms a series of layers with the most weathered material at the top, ...
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.
1 Introduction Overview of Bauxite Ore As a residue of strong chemical weathering, bauxite is mainly composed of Aloxyhydroxides, Feoxides/oxyhydroxides and Tioxides (mainly TiO 2 phases) (Bárdossy, 1982, 1994; Bárdossy and Aleva, 1990; D'Argenio Mindszenty, 1995; Retallack, 2010 ).
The bauxite was primarily deposited under alkaline and reducing karstic environments, and microorganisms likely were involved in the formation of bauxite ( Liu et al., 2017b, Yang et al., 2021 ). Further, the hypothesis that diaspore was formed by superficial crystallization was proposed ( Liu et al., 2010, Liu et al., 2017b ).
Chemical Geology Volume 622, 5 April 2023, 121388 Genetic mechanism of superlarge karst bauxite in the northern North China Craton: Constrained by diaspore insitu compositional analysis and pyrite sulfur isotopic compositions Lihua Zhao, Xuefei Liu, Qingfei Wang, Xinli Ma, Lei Liu, Xuefei Sun, Jun Deng Add to Mendeley
Bauxite deposits are generally divided into two categories according to their occurrence status and genesis: (1) lateritic bauxite contains gibbsite as the main ... mineralogical and micromineralogical studies can provide information about the bauxite formation process and the denudation history of the source rocks (D'Argenio and Mindszenty ...
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.
However, the genesis of many bauxite occurrences remains insufficiently explained and untouched by modern models and techniques. The karst bauxite of the Unterlaussa mining district represents the most significant occurrence in Austria and is a prominent member of the European karst bauxites.
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