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Compared to the bauxite ore, the genesis of the entire aluminous-bearing strata has received less attention. In this study, we conducted geological, mineralogical, and geochemical analyses on core samples from the aluminous-bearing strata located in Xingxian area, situated within the northern NCC, aiming to elucidate the genetic process of ...
1. Introduction. Bauxites are residual aluminum deposits, derived from lateritic weathering of pre-existing alumosilicate rocks under tropical and/or subtropical climatic conditions, characterized by annual precipitation rates of 1,200 mm and annual temperatures above 22 °C (Bárdossy, 1982).Bauxite is the main aluminum ore and also represents an important source …
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 …
Download Citation | Genesis of Bauxite Ore in Toba Area Sanggau District, West Kalimantan Province | Indonesia's largest bauxite reserves are in the province of West Kalimantan, which is 703 ...
Karstic-type bauxite, which is defined within the bedrock as carbonate (Bárdossy, 1982, Calagari and Abedini, 2007, Deng et al., 2010), is widely distributed in the North China Block (NCB).The western Henan in the NCB contains approximately 1 billion tons of bauxite ore.Its geological, mineralogical, and geochemical features, as well as the ore-forming …
Five typical bauxite samples from three ore deposits from the wider area of Grebnik Mt. (Metohija, Serbia) were examined with the optical microscopic, X-ray powder diffraction (XRPD) and chemical ...
The boundary is determined by the cut off given for the bauxite ore. It also may occur that that the bauxite ore forms lenses: for example, in Kolhapur district (West Coast, India) there are lenses of sub grade laterite of 1–2 km long 300–400 m wide and 2–3 m thick. This type of bauxite ore is quasi floating inside the laterite capping.
The genesis of ore minerals in karst bauxite has been well-studied (e.g., Bárdossy and Aleva 1990; Bogatyrev et al. 2009; Wang et al. 2012; Liu et al. 2013, 2017; Gu et al. 2013; Zhang et al. 2013, 2021; Mongelli et al. 2016, 2017), and we review our findings in the context of this knowledge. The critical metals examined herein also display an ...
The formation comprises a stratum of bauxite hosting "Shanxi-style" iron ore in its lower section, a bauxite G layer in the middle ... 4.1 Petrographic classification of bauxite. The genesis of bauxite rock predominantly arises from the depletion of alkali metal ions and the concentration and deposition of aluminum-rich ions due to ...
Abstract Exploration and mining success of a bauxite deposit rely greatly on an adequate modelling of spatial characteristics of constituent geo-variables through an understanding of deposit geology, because it is the geology that governs the process of mineralisation and geostatistics provide its meaningful role in spatial characterization of …
Mineral phases reflect parental affinities and record all the chemical effects during the ore-forming processes, and many researchers have discussed the mineral genesis of karst bauxite (Bárdossy, 1982, Wang et al., 2012, Liu et al., 2013, Ahmadnejad et al., 2017, Vind et al., 2018, Yang et al., 2019).
The Quaternary bauxite ore contains variable REE contents of 151.98–799.18 ... Schematic diagrams showing the most likely scenario for the formation and evolution of the western Guangxi bauxite, and the genesis of REE minerals. It is not uncommon for the chemical compositions of REE–fluorocarbonates to vary greatly within the same deposit.
Bauxite deposits, which are residual weathering products generated through the weathering of a variety of metamorphic, igneous, and sedimentary aluminosilicate-rich parent rocks under humid tropical to subtropical climates, have been the subject of study for many decades. ... ore genesis; critical elements; Benefits of Publishing in a Special ...
Based on ore genesis, bauxite is divided into two types, lateritic type and karst type. The former is mainly distributed in western Africa, north South America, India, Southeast …
@article{Wang2018CombinedTA, title={Combined tectonic and paleogeographic controls on the genesis of bauxite in the Early Carboniferous to Permian Central Yangtze Island}, author={Ruixue Wang and Qingfei Wang and Yuanxiao Huang and Shujuan Yang and Xuefei Liu and Qi Zhou}, journal={Ore Geology Reviews}, year={2018}, url={https://api ...
In this contribution, we build on an existing study, and present new LA–ICP–MS data of elemental and sulfur isotopic compositions in pyrite from the Danping bauxite deposit …
The Lower Carboniferous Jiujialu Formation bauxite deposits of northern Guizhou Province, China, are a Kazakhstan subtype of karst bauxite deposits. The provenance of the Jiujialu Formation has long been debated, with uncertainty about the formation of the bauxite deposits. Here we report new geochemical data that indicate the affinity between the Lower …
Here we discuss how the relation affects the karst and bauxite evolution through analyzing distributions of orebody parameters from 9,007 exploration wells (434 orebodies) in …
Examples of sedimentary ore minerals include bauxite (Al2O3·nH2O), uranium-bearing minerals, and phosphate minerals. Residual ore minerals: Residual ore minerals are formed by the weathering and erosion of rocks at the Earth's surface, which results in the concentration of valuable minerals in residual soils or sediments. This process ...
The document discusses bauxite, including its mineral composition, locations of deposits, and uses. It notes that bauxite is the primary ore for aluminum production. India has significant bauxite reserves and is the 5th …
Developments in Earth system research have led to widespread interest in multi-sphere interactions that may have controlled bauxite formation. Although karst bauxite ores …
More than 0.5 billion tons of late Permian bauxite overlies the karstic topography of the Maokou Formation of western Guangxi in China. Here, we provide new mineralogical, geochemical, Sr–Nd–Pb isotopic, and pyrite S isotope and trace element compositional data for the Pingguo bauxite deposit, aiming to further our understanding of the genesis of Permian bauxite. The …
The Parnassos-Ghiona bauxite deposit in Greece of karst type is the 11th largest bauxite producer in the world. The mineralogical, major and trace-element contents and δ18O, δ12C, δ34S isotopic compositions of bauxite ores from this deposit and associated limestone provide valuable evidence for their origin and biogeochemical processes resulting in the …
Initial investigations have provided a first insight into the geology and conditions of lateritic bauxite deposits formation in the WZD area (Jin et al., 2009, Liu, 2007, Wu et al., 2006, Wu et al., 2008, Liu et al., 2010a, Yin, 2009).However, the detailed ore-forming process is still ambiguous and the source rock of the WZD bauxite deposits has long been a matter of debate.
The genesis of bauxite is closely related to carbonate or mafic basement and controlled by lithofacies paleogeography, paleoclimate, palaeogeomorphology and other factors.
In this study, we present the main findings from microstructural and mineralogical studies and their implications for the genesis of bauxite/laterite in Mainpat plateau. Megascopic studies showed reddish laterite to off-white bauxite. Strong hydrolytic action formed small oolites and large pisolites with sizes of 1–2 cm in diameter. Pisolites and oolites were elliptical, …
DOI: 10.1016/j.oregeorev.2019.103161 Corpus ID: 210318736; Genesis of karst bauxite-bearing sequences in Baofeng, Henan (China), and the distribution of critical metals @article{Yang2019GenesisOK, title={Genesis of karst bauxite-bearing sequences in Baofeng, Henan (China), and the distribution of critical metals}, author={Shujuan Yang and Qingfei …
Bauxite ore is overlain by fine-grained Fe sulfidebearing and calcareous claystone and argillaceous limestone, which are in turn overlain by massive, compact limestone of Santonian age. ... Iran: Implications for ore genesis, rare earth elements fractionation and parental affinity Farhad Ahmadnejad a, Hassan Zamanian a,⇑, Batoul Taghipour b ...
The preliminary conclusions are that: (1) The bauxite ore contains abundant anatase, which positively correlates with the whole-rock concentrations of TiO2 and Nb, indicating that the Nb is hosted ...
In this contribution, we build on an existing study, and present new LA–ICP–MS data of elemental and sulfur isotopic compositions in pyrite from the Danping bauxite deposit to determine the ore-forming processes and constrain the ore genesis mechanisms, which will help in understanding other Permian bauxite deposit in the WZD area and even ...
