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Critical metal enrichment in Upper Carboniferous karst …

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, …

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Provenance and genesis of karstic bauxite deposits in China

Karstic bauxite deposits that formed during the five levels have different sources, controls, and ore-forming processes. However, the current provenances and processes of karstic bauxite deposits of all five levels, which are primarily based on detrital zircon and mercury isotope analyses, remain unclear.

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Genesis of Danping bauxite (Northern Guizhou, China) and …

The Danping bauxite deposit, located in the WZD area, has a resource of 22.3 million tons and an Al 2 O 3 grade of 45.83 %–70.28 % and the ratio of Al 2 O 3 /SiO 2 (A/S) ranges from 2.72 to 14.52 (Xu et al., 2017).The strata is developed from Cambrian to Jurassic, with the exception of the Devonian (Li et al., 2020) (Fig. 1).The purplish red …

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Genesis of Bauxite Ore in Toba Area Sanggau District

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 ...

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Provenance and Tectonic Evolution of Bauxite Deposits in …

Abundant bauxite deposits formed in the Tethyan Metallogenic Domain are of great importance to bauxite research. However, previous studies generally focus on local bauxite occurrences formed over certain geologic time. A comprehensive understanding of the genesis and characteristics of bauxite deposits is hence essential.

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Combined tectonic and paleogeographic controls on the …

The bauxite ore in the middle part shows earthy and compact structure and clastic, oolitic, pisolitic texture, a white coloration (Fig. 7 B) and is mainly composed of diaspore with minor anatase (Fig. 5 B) The YFB, bauxite (sample YFB 01-4) developed …

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Geology, geochemistry, and genesis of REY minerals of the …

The present study focuses on the geochemistry and occurrence of REY (rare earth elements and yttrium)-bearing minerals in the Late Cretaceous karst bauxite deposits in the central part of the Zagros Simply Fold Belt (ZSFB), SW Iran. The ore bodies comprise a series of individual pods and/or contiguous lenses that occur as infills of deep karst …

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Provenance of bauxite and clay deposits in the …

Zircon grains with Precambrian ages of 2,713 to 549 Ma may have been derived from metamorphic rocks within the NQOB. The Benxi Formation bauxite in this …

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Distribution, genetic types and current situation of …

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 Asia, northern and southwestern Australia, while the latter primarily occurs in southern Europe, Caribbean region, western Asia and China.

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Critical metal enrichment in Upper Carboniferous karst bauxite …

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 …

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Mineralogical and geochemical studies of boron-rich bauxite ore

All these processes can make it more difficult to understand the original controls of bauxite ore formation and to carry out effective regional exploration for hidden bauxite deposits. ... In the present work, we have utilized this new, integrated approach to study the fundamental controls on the genesis of the karst-type bauxite deposits in ...

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Genesis of the Guangou karstic bauxite deposit in

The genesis of the REE minerals, together with the occurrence of other minerals, indicates that intensively acidic and oxidizing conditions developed before the formation of the Permian bauxite ore. Towards the end of the Permian, the conditions became reducing and alkaline, favorable for the large-scale bauxitization.

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Mineralogical and geochemical evolution of the Bidgol bauxite …

The Lijiatian bauxite deposit is the largest deposit in Hunan Province, with a total Al resources exceeding 7 × 10 6 tons. The ore-bearing strata in the lower Permian Liangshan Formation (ca. 275 Ma) are comprised a 3–5-m-thick bauxite layer (bauxite ore/clay) and an underlying 4–8-m-thick Fe layer (Fe ore/Fe-rich clay).

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Petrography, mineralogy, geochemistry and genesis of the Balaya bauxite

The Balaya bauxite plateau is located in the Kindia bauxite province; where the bauxite ores are found above Ordovician and Silurian formations in the southern part of the Guinean Paleozoic Bove Basin, West African Craton.In this study, petrographical, mineralogical and geochemical investigations were carried out on the different type of …

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Geological characteristics, ore genesis and comprehensive …

Download Citation | Geological characteristics, ore genesis and comprehensive utilization of coexisting of dafoyan bauxite deposit in Chongqing | Dafoyan bauxite deposit in Chongqing is a large ...

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Petrographic and geochemical features of the B3 bauxite …

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 …

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Kaolinization of Bauxite: A Study of the Vlasenica Bauxite …

During the epigenetic alteration of boehmitic karstic bauxite in the Vlasenica region of Yugoslavia, which was caused by siliceous water descending through the deposit by means of cracks, fissures, etc., oolites were less altered compared with the coexisting matrix material, which was intensely kaolinized. The following zonal alteration pattern of the …

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Combined tectonic and paleogeographic controls on the genesis …

The Pingguo bauxite contains three distinct layers: a lower layer dominated by ferric clay or weathered iron ore, a middle layer of cryptocrystalline and oolitic bauxite ore, and an upper layer ...

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Genesis of Bauxite Ore in Toba Area Sanggau District, West …

The comparison between Al and Si values is a benchmark for the economics of bauxite mines. Gibbsite is the major mineral in the bauxite ore, while hematite, goethite, kaolinite, and quartz are the accessory minerals. The deposit is recognized as Low-Fe bauxite due to comparing Al2O3, Fe2O3, and Si2O3 concentrations.

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Provenance of bauxite and clay deposits in the …

The bauxite and clay deposits of Western Henan, located in the southern part of the North China Craton (NCC), are rich reserves of bauxite ore, and the provenance of this bauxite has received much attention.

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Genesis of Carboniferous aluminous-bearing strata in the …

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 …

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Petrography and Geochemistry of the Jajarm Bauxite ore …

Chondrite-normalized REE patterns obtained for the Jajarm bauxite resemble those of the composition of upper continental crust (UCC) (Figure 11) and shale 279 KARST BAUXITE ORE DEPOSIT, NE IRAN Zr karst bauxite 1000 low iron lateritic bauxite sedimentary rocks basalt high iron lateritic bauxite 100 ul ro trab ck a s s ic Cr (ppm) acidic and ...

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Genesis of the Guangou karstic bauxite deposit in

The Guangou bauxite deposit in western Henan, China, is located in the North China Block and to the north of the North Qinling orogenic belt. The orebody is hosted within the lower member of the ...

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Provenance and genesis of karstic bauxite deposits in China

In this study, detrital rutile was selected from bauxite in 16 large to super-large karstic bauxite deposits from all five bauxite levels of the NCC and SCB to …

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ore genesis of bauxite

Mineral genesis and distinctive structures within bauxite ores. The genesis and relationship among various minerals in the karst bauxites reflect all the chemical effects during the entire ore-forming process. ... The presence of ooids and pisoids within the bauxite ore can be attributed to the original heterogeneity of colloids that originated ...

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Geologic characteristics and potential of bauxite in China

Chen et al. (2007) analyzed the bauxite ore belts in China and divided the country into different mineral provinces, zones/belts, sub-belts, and ore fields. A total of 15 bauxite belts are identified in China (Fig. 6). Four mineral provinces of China contain significant bauxite resources, namely the North China platform, Yangtze platform, South ...

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Geochemistry and Genesis of the Bauxite Ore (Rock) in the …

The Feichijiao bauxite deposit in Qiubei City of Yunnan Province is a newly discovered large-size bauxite deposit. A study of major and trace elements and REE of the sedimentary bauxite ore (rock ...

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Geochemical and Mineralogical Characteristics of …

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 …

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Petrography and Geochemistry of the Jajarm Bauxite ore …

The Jajarm bauxite deposit, northeast Iran, is the largest such deposit in Iran. The deposit is sandwiched between the Triassic Elika formation and the Jurassic Shemshak formation, housed within karstic features developed within the former unit. The deposit generally shows an internal layering defined by the following four distinct horizons (from …