Mineralogical characteristics of the karstic bauxite deposits in the Xiuwen ore belt, Central Guizhou Province, Southwest China

Ling, Kunyue; Zhu, Xiwen; Tang, Hao-Shu; Wang, Zhonggang; Yan, Hu; Han, Tao; Chen, Wen-Yi

doi:10.1016/j.oregeorev.2014.09.003

Cited by 55 publications

(22 citation statements)

References 42 publications

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“…Several studies on karst bauxite deposits have proposed that bauxite formed from lateritized material precursor (Valeton, 1972;Ling et al, 2015), ferruginous-argillaceous debris (Zarasvandi et al, 2008), or clayey (mainly kaolinitic) material (MacLean et al, 1997;Oggiano and Mameli, 2001). A previous study of the Fuentespalda karst bauxite deposit proposed that pisolitic bauxite originated in situ from precursor lateritic clays through a complex sequence of mineralogical processes (Yuste et al, 2015).…”

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confidence: 99%

Origin and geochemical evolution from ferrallitized clays to karst bauxite: An example from the Lower Cretaceous of NE Spain

Yuste

Bauluz

Mayayo

2017

Ore Geology Reviews

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Four outcrops of Lower Cretaceous (Barremian) karst bauxites located in Teruel (NE Spain) were analysed. The deposits show a heterogeneous-chaotic lithostructure consisting of pisolitic bauxite blocks embedded in lateritic red clays filling karst cavities. The research has focused on the geochemical study of major, minor, and trace elements (including some critical to industry) of both the bauxites and clays. The objective was to investigate the bauxite precursor material and to characterize the system's geochemical evolution. Geochemical analyses were carried out by inductively-coupled plasma optical emission and mass spectroscopy. An absolute weathering index has been calculated to estimate element mobility, assuming Ti as an immobile element and the Upper Continental Crust (UCC) as parent material. Further, selected samples were observed by field emission scanning electron microscopy. The data indicate that both the bauxites and red clays originated by intense chemical weathering from more mafic argillaceous sediments than the UCC. Ongoing weathering caused the bauxitization of the upper parts of the original profile, preventing the lower parts from being bauxitized, thus producing the ferrallitized clays underlying the pisolitic bauxites. Subsequent karst reactivation gave rise to the current lithostructure. Ferrallitization is related to Fe, Sc, and V enrichment. On the other hand, although bauxites are relatively enriched in some elements compared to clays, the more intense chemical weathering associated with bauxitization led to chemical homogenization and widespread element depletion. During the bauxitization, Al, Ti, Zr, Cr, and probably Hf and the critical element Nb behaved as more immobile elements in the system. Bauxitization also enhanced homogenization and depletion of the REE, which is more pronounced for the LREE. HREE trends seem to be partly related to the concentration of Ti oxides in the bauxites, whereas P-bearing phases, more frequent in the clays, control the LREE. Subsequent to bauxitization, partial kaolinization of the bauxite took place related to the circulation of acid solutions that also caused the karst reactivation. These late processes caused some Al depletion in the bauxites and enhanced Fe loss together with V and, to a lesser extent, Ge.

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confidence: 99%

Origin and geochemical evolution from ferrallitized clays to karst bauxite: An example from the Lower Cretaceous of NE Spain

Yuste

Bauluz

Mayayo

2017

Ore Geology Reviews

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“…Until the early stage of Early Carboniferous, the whole Guizhou region basically maintained the palaeotectonic framework of sea in south and continent in north (Deng et al, 2010). During the Early Carboniferous Viséan, with the further transgression of the South China Sea from south to north, resulted in the deposition of the karstic bauxite hosted in the Jiujialu Formation under the warm humid climate conditions (Gao et al, 1992;Ling et al, 2015;Long et al, 2017).…”

Section: Geological Settingsmentioning

confidence: 99%

“…Rock units in study area mainly include, from the oldest to the youngest, the Middle Cambrian Shilengshui Formation, Lower Carboniferous Jiujialu Formation and Baizuo Formation, Lower Permian Qixia Formation; and the Lower Triassic Daye Formation (Ling et al, 2015;Long et al, 2017). The Shilengshui Formation represents the autochthonous basement of Lindai bauxite.…”

Section: Geological Settingsmentioning

confidence: 99%

Viséan Fossil Plants from the Jiujialu Formation in Central Guizhou Province: Implications for Age of Bauxite and Palaeoenvironment

Luo

Yang

Gao

et al. 2020

Acta Geologica Sinica (Eng)

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Fossil plants from the carbonaceous shale of upper part of the Lower Carboniferous Jiujialu Formation in Lindai bauxite deposit fill a gap regarding the distribution of Early Carboniferous flora in Central Guizhou Province. Here the Lindai plant assemblage is systematically described, and its composition and geological age are discussed. Research demonstrates that 9 species in 6 genera of the fossil plants are discovered in this study, and they belong to lycopsids, sphenopsids and ferns, respectively. Based on the analysis of the floral composition, the geological age of the Lindai plant assemblage belongs to the Early Carboniferous Viséan. The discovery of Lindai plant assemblage not only provides a new fossil evidence to restrict the age of bauxite deposits in Lower Carboniferous Jiujialu Formation of Central Guizhou Province, but also has great significance to further research the palaeoecological setting and floral evolution during the Early Carboniferous.

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“…Microstructural properties of oxide and silicate minerals of aluminum and iron were studied from the representative samples (sample 1-6) under Scanning Electron Microscope (SEM). SEM studies on bauxite had been reported by Yu et al [13]; Bhukte and Chaddha [14]; Ling et al [15] and Sahoo et al [11]. The work focuses on the microstructural and morphological characteristics of bauxite minerals and their genetic development.…”

Section: Microstructural Featuresmentioning

confidence: 99%

Morphological, microstructural and mineralogical dataset of bauxite over Mainpat plateau from a part of Deccan traps, Surguja district, Chhattisgarh

2020

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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, circular, and as broken pieces. Matrix of gibbsite and hematite was found in petrographic observations. Morphological characteristics include pisolitic, oolitic, lamellar, and euhedral gibbsite. Microstructures discovered were spongy gibbsite, flower-like crystals, elongated gibbsite, and framework type. Crystals of gibbsite were found to be predominant with partially crystallized ilmenite and hematite as subordinate phases. Scattered bauxite crystals made free pores for passage of solutions enhancing leaching conditions. Al, Ti, Fe, Si, Cu and Zn were identified as significant components; out of which, Al and Ti have the highest concentration. The samples have high alumina constitutes of 61.45% and 65.40% with a low iron content of 6.66% and 5.61%. High Ti content of 19.38% and 17.55% might be due to strong hydrolytic action during the alteration of basalt to bauxite. Low Si content of 2.68% indicates strong leaching activity. XRF analysis showed that the samples have undergone strong lateritization. XRD examination of bauxite/laterite revealed a mixture of minerals like gibbsite, boehmite, goethite, hematite, and anatase. Enrichment in boehmite shows in situ weathering. The study aims to extract the genesis and depositional characterization of bauxite through its morphological, microstructural, and mineralogical properties.

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Mineralogical characteristics of the karstic bauxite deposits in the Xiuwen ore belt, Central Guizhou Province, Southwest China

Cited by 55 publications

References 42 publications

Origin and geochemical evolution from ferrallitized clays to karst bauxite: An example from the Lower Cretaceous of NE Spain

Origin and geochemical evolution from ferrallitized clays to karst bauxite: An example from the Lower Cretaceous of NE Spain

Viséan Fossil Plants from the Jiujialu Formation in Central Guizhou Province: Implications for Age of Bauxite and Palaeoenvironment

Morphological, microstructural and mineralogical dataset of bauxite over Mainpat plateau from a part of Deccan traps, Surguja district, Chhattisgarh

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