Trace and rare earth elements constraints on the sources of the Yunfeng paleo-karstic bauxite deposit in the Xiuwen-Qingzhen area, Guizhou, China

Long, Yongzhen; Chi, Guoxiang; Liu, Jianping; Jin, Zhangdong; Dai, Tangen

doi:10.1016/j.oregeorev.2017.09.014

Cited by 35 publications

(17 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The threshold of changes in deposition and lateral geochemical processes can be observed in simultaneous convex (M-shaped) and concave (Wshaped) tetrad effect curves. These features can be attributed to change in the bauxitization conditions and/or solution(s) during weathering and alteration processes (Censi et al, 2007;Monecke et al, 2007;Wu et al, 2011;Nardi et al, 2012). As shown in Figure 10d, the occurrence of both M-and W-shaped curves in the chondrite-normalized REE patterns of the BRB part of the horizon in this district may be owing to changes in depositional conditions.…”

Section: Factors Controlling the Behavior Of Reementioning

confidence: 89%

“…Rare earth elements (REEs) have been used as a good and beneficial tool for investigation of geochemical processes during development and evolution of wide range of deposits in different environments (Chen and Zhao, 1997;Censi et al, 2007;Karadağ et al, 2009;Hannigan et al, 2010;Mongelli et al, 2016;Abedini et al, 2018a,b;Rezaei Azizi et al, 2018a,b). This coherent group of elements from La to Lu with atomic number from 57 to 71 displays very similar behavior due to their very similar ionic charge and radius.…”

Section: Introductionmentioning

confidence: 99%

“…The normalized REE distribution patterns generally display very smooth curves because of their gradual decrease in ionic radius. Nevertheless, some irregular shapes in the normalized REE curves can be observed owing to the lanthanide tetrad effect (LTE) (Censi et al, 2007;Rezaei Azizi et al, 2017;Abedini et al, 2018b,c). The LTE as a geochemical feature brings about four separate groups of lanthanides in the normalized REE distribution patterns.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Ree mobility and tetrad effects in bauxites an example from the Kanisheeteh deposit, NW Iran

Abedini¹

2019

Acta Geodynamica Et Geomaterialia

View full text Add to dashboard Cite

The Kanisheeteh bauxite deposit (NW Iran) is located on the Irano-Himalaya karst bauxite belt and was developed as stratiform horizon along the contact of the Permian and Triassic Formations. Based on absolute weathering index (AWI), HREE were leached out, whereas LREE suffered both leaching and fixation during bauxitization. The non-CHARAC characteristic of Y/Ho ratios can be attributed to geochemically known phenomenon as the "tetrad effect". The simultaneous convex and concave curves of the tetrad effect were observed in the chondritenormalized REE patterns of the bauxite ores. The correlation between the sizes of T 4 and AWI% values revealed two separate populations. The first one is characterized by a wide variation in sizes of T 4 and very narrow AWI% values, and is thought to be related to acidic zone of the profile. In contrast, the second one is marked by a narrow variation in sizes of T 4 and wide variation in AWI% values, and is conceived to be affiliated to alkaline zone of the profile. In this research, the tetrad effect proved to be capable of clarifying the geochemical characteristics of the deposit and can be applied as a good geochemical index to investigate the prevailed paleoconditions of depositional environments.

show abstract

Section: Factors Controlling the Behavior Of Reementioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Ree mobility and tetrad effects in bauxites an example from the Kanisheeteh deposit, NW Iran

Abedini¹

2019

Acta Geodynamica Et Geomaterialia

View full text Add to dashboard Cite

show abstract

“…REEs are also useful for assessing geochemical processes during the evolution of sediments in various environments (Chen & Zhao, 1997;Censi et al, 2007;Karadağ et al, 2009;Hannigan et al, 2010;Mongelli et al, 2016;Abedini et al, 2018). The distribution and differentiation of REEs have also been well studied in seawaters, marine sediments and weathering environments (Abedini & Calagari, 2013;Mongelli et al, 2014;Buccione et al, 2016;Liu et al, 2016;Long et al, 2017;Torr et al, 2017;Chen et al, 2018). In these cases, the distribution patterns of REEs are generally controlled by weathering of terrestrial material, hydrothermal activities, scavenging, oxygen fugacity, proximity to source lithologies, deposition due The tetrad effect in REE patterns and non-chondritic Y/Ho ratios Normalized REE distribution diagrams produce smooth curves that remove variation due to lanthanide contraction, the Oddo-Harkins rule (Cantrell & Byrne, 1987) and charge radius control (CHARAC) behaviour (Lottermoser, 1992;Bau, 1996).…”

mentioning

confidence: 99%

Rare earth element geochemistry of altered pyroclastic rocks in the Hashtjin area of north-west Iran

et al. 2020

View full text Add to dashboard Cite

This study evaluates the rare earth element (REE) geochemistry in altered trachyandesitic ignimbrites, tuff and lava flows in the Hashtjin area by assessing chondrite-normalized REE patterns and Y/Ho geochemical ratios. Modifications in the REE patterns took place along altered fault zones that were affected by hypogene and supergene alterations. The precursor volcanic and pyroclastic rocks contain phenocrysts of plagioclase accompanied by augite, zircon, apatite and pyrite. Based on X-ray diffraction analysis, the main mineral assemblages of the altered units consist of kaolinite as the main clay mineral, SiO 2 polymorphs (quartz and cristobalite) and anatase as a minor constituent. The chondrite-normalized REE patterns of argillic samples reveal fractionation of light REEs (LREEs) compared to heavy REEs (HREEs), together with a marked Eu anomaly and a weak W-type tetrad effect related to the weak non-charge radius control (CHARAC) behaviour of REEs and slightly higher Y/Ho and Zr/Hf ratios. The relationship between the Y/Ho and Zr/Hf ratios and recognizable T 3 and T 4 effects (tetrad effect) suggests that an increasing degree of water-rock interaction occurred during hypogene alteration processes by acidic hydrothermal fluids that were overprinted by supergene alteration. Water-rock interaction and adsorption by Mn-oxides and clay minerals are considered to have played important roles in determining the close to non-CHARAC behaviour of REEs during the argillic alteration of the pyroclastic rocks in the Hashtjin area.

show abstract

“…Previous studies have shown that the bauxite deposits of the world are scattered around the northern Mediterranean coast, Caribbean basin, East-Asia, Irano-Himalaya, North America, southwest Pacific, and finally Urals-Siberia-Central Asia belts (Bardossy, 1982;Bardossy and Aleva, 1990). In recent years, many studies worldwide have been conducted by researchers to investigate the REE geochemistry of bauxite deposits (Ling et al, 2013;Mongelli et al, 2014;Peh and Kovacevic Galovic, 2014;Liu et al, 2016;Mongelli et al, 2016;Gamaletsos et al, 2017;Hou et al, 2017;Long et al, 2017;Mongelli et al, 2017;Torró et al, 2017;Chen et al, 2018;Ling et al, 2018).…”

mentioning

confidence: 99%

REE Tetrad Effect as a Powerful Indicator of Formation Conditions of Karst Bauxites: A Case Study of the Shahindezh Deposit, NW Iran

Abedini

Azizi

Calagari

2019

Acta Geologica Sinica (Eng)

View full text Add to dashboard Cite

Study of the concentration of major, trace, and rare earth elements (REE) in the Shahindezh karst bauxite deposit, northwestern Iran clarifies the relationship of the tetrad effect with geochemical parameters in the bauxite ores. The existence of irregular curves in the chondrite‐normalized REE patterns as well as non‐CHARAC behavior of geochemically isovalent pairs (Y/Ho) are related to the tetrad effect. The meaningful positive correlation between the sizes of the calculated T3 tetrad effect and some geochemical factors such as Y/Ho, ΣREE, La/Y, (La/Yb)N, and (LREE/HREE)N as well as some major oxides‐based parameters like Al2O3 + LOI/SiO2 + Fe2O3, Al2O3/Fe2O3, Al2O3 + LOI, IOL, and SiO2 + Fe2O3 indicate that the studied bauxite horizon was likely deposited by different (acidic and/or alkalic) solutions at different stages. The lower part of the studied horizon with a thickness of ∼4.7 m displays alkali characteristics whereas the upper parts of the horizon with a thickness of ∼5.3 m are characterized by more acidic conditions. These results are fully supported by the co‐occurrence of convex‐concave tetrad effect curves in the chondrite‐normalized REE patterns. Therefore, the tetrad effect phenomenon used in this study has proved to be a good and reliable geochemical proxy to assess the conditions of the depositional environment in the Shahindezh bauxite ores.

show abstract

Trace and rare earth elements constraints on the sources of the Yunfeng paleo-karstic bauxite deposit in the Xiuwen-Qingzhen area, Guizhou, China

Cited by 35 publications

References 36 publications

Ree mobility and tetrad effects in bauxites an example from the Kanisheeteh deposit, NW Iran

Ree mobility and tetrad effects in bauxites an example from the Kanisheeteh deposit, NW Iran

Rare earth element geochemistry of altered pyroclastic rocks in the Hashtjin area of north-west Iran

REE Tetrad Effect as a Powerful Indicator of Formation Conditions of Karst Bauxites: A Case Study of the Shahindezh Deposit, NW Iran

Contact Info

Product

Resources

About