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.
It is generally produced from bauxites through the Bayer process. Several organic compounds such as humic matters and oxalates are introduced into the Bayer liquor during the digestion process, resulting in significant hazards to precipitation of aluminum hydroxide.
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...
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 terrestrial deposition process for karst bauxite is difficult to constrain due to its allochthonous origin, multiple controls and the difficulty in geodynamic reconstruction. This ambiguity has been clarified from investigation of the provenance and geologicgeographic conditions for the formation of Quaternary gibbsite nodules in the Yongjiang Basin.
The genesis of the Lindai bauxite deposit, including the parental affinity, mineral genesis, migration and sedimentation, and oreforming process of the bauxite, has been described in detail by ...
Here we characterize the bauxite deposit in Yunnan area, China, through mineralogical and textural characteristics using XRD, SEMEDX, and microRaman analyses. The Aloxyhydroxide polymorphs (AlO (OH)) such as diaspore and boehmite are the dominant phases in most of the samples. Gibbsite (Al (OH) 3) is the main mineral in two samples from ...
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.
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 ...
Geochemistry of the early Jurassic Soleiman Kandi karst bauxite deposit, IranoHimalayan belt, NW Iran: 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.
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 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.
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.
Processing of bauxite in the Bayer process is greatly determined by the nature of bauxite. Comparative dissolution behavior of gibbsite, boehmite and diaspore in alkali solution is presented in Fig. 2 [].It is evident that among the various types, gibbsitic bauxite is the most reactive and easily digestible (105140 °C).
We propose that the triggering process for the genesis of the paleosol profiles, bauxitic material and bauxite pods was a coupled mechanism between favourable climate and uplift along the northern ...
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 ...
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
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 global bauxite market is projected to reach US billion by 2030, at a CAGR of %. Production of bauxite is concentrated in a few countries, with Australia, China, and Guinea being the ...
As for karst type bauxite, Mongelli (1997) and Öztürk et al. (2002) studied the genesis of the bauxite formation in the southern Aplian block in Italy and in Taurides, Turkey respectively and ...
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 Article Fulltext available
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 ...
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 ...
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
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 ...
Each genetic group of bauxite has experienced separation of aluminum (Al) and silicon (Si) by the accumulation of Al, and the removal of Si, alkali metals, and rare earth elements from parent rock (sediment) during its weathering. Download : Download fullsize image Figure 1.
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 ...
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 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 ...
© DZCrusher - كل الحقوق محفوظة
