Genesis of certain bauxite profiles from India

Balasubramaniam, Krishnan; Surendra, M.; Kumar, T. Senthil

doi:10.1016/0009-2541(87)90128-8

Cited by 17 publications

(3 citation statements)

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“…Then, rising sea levels in warm climates and the covering of the bauxite formation by a carbonate seal were associated with marine transgression. This inverse sea level rise and fall relationship with the Balasubramaniam et al (1987) showing the basic character of the parental rock. b) Plaots of Zirve bauxite samples on the modified Zr/TiO 2 vs. Nb/Y diagram (Pearce, 1996) of Winchester and Floyd (1977), which fall into the alkali basalt area for the parent rock of the bauxite.…”

Section: Formation Of Bauxite Related To Paleotectonic and Paleoenvironmental Changesmentioning

confidence: 83%

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Formation of Ti-rich bauxite from alkali basalt in continental margin carbonates, Payas region, SE Turkey: implications for sea level change in the Upper Cretaceous

Öztürk¹,

Hanilçi²,

Cansu³

et al. 2021

Turkish J Earth Sci

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The Payas region bauxite deposits occur as a sandwiched layer that is a few kilometers long and an average of 10 m thick between the lower and upper Cretaceous carbonates of the Arabian Platform. The bauxites occur as blanket and pocket types, are chemically and texturally homogeneous and have a thrust structure with ophiolitic mélange formations. The bauxite varies in color, from reddish-brown to grayish-green to black, and has a massive, patchy and very rare oolitic-pisolitic texture. The bauxite mainly consists of diaspore, hematite, rutile, anatase, rare kaolinite, boehmite and pyrite minerals. Prismatic and lath-shaped euhedral rutile within the bauxites indicates in situ formation of the bauxites from Ti-rich basaltic pyroclastics. The chondrite-normalized REE pattern of the bauxite is similar to the basalt pattern and has a very weak Eu anomaly (0.9). Two groups of elements have been enriched in the Payas region bauxite: the first group contains TiO 2 (9.67 wt%), Cr (752 ppm), V (617 ppm) and Ni (72 ppm), and the second group comprises Zr (993 ppm), Nb (86 ppm) and Sn (7 ppm). These two groups of element enrichment indicate that the parental material of bauxite has an alkali basalt character. The carbon and oxygen isotope stratigraphy throughout the carbonate section from the bottom to the top indicates that the climate was warm during bauxitization (mean δ 18 O VPDB :-6.15‰) and relatively cold after bauxite deposition (mean δ 18 O VPDB :-4,71‰). A marine regression during the warm climate could be related to the uplifting of the coastal zone, which is linked to vertical fault movements of normal faults. A rapid transgression after bauxite formation during the cold climate period can be explained by subsidence of the continental margin, which is associated with episodic ophiolitic nappe loading during the closure of the Neotethyan Ocean in the region.

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Section: Formation Of Bauxite Related To Paleotectonic and Paleoenvironmental Changesmentioning

confidence: 83%

“…Figure16. a) Plots of the Zirve bauxite ore samples on the Ga-Zr-Cr ternary diagram ofBalasubramaniam et al (1987) showing the basic character of the parental rock. b) Plaots of Zirve bauxite samples on the modified Zr/TiO 2 vs. Nb/Y diagram(Pearce, 1996) ofWinchester and Floyd (1977), which fall into the alkali basalt area for the parent rock of the bauxite.…”

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confidence: 99%

Formation of Ti-rich bauxite from alkali basalt in continental margin carbonates, Payas region, SE Turkey: implications for sea level change in the Upper Cretaceous

Öztürk¹,

Hanilçi²,

Cansu³

et al. 2021

Turkish J Earth Sci

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“…This plot shows that this deposit might have had variable protoliths including basalt, granite, and sandstone (Figure 14). In addition, geochemical data in trivariate plot of Zr-Ga-Cr (Balasubramaniam et al, 1987) reveals that this deposit could have had a wide spectrum of protoliths including mafic and felsic igneous and metamorphic rocks (Figure 15). By referring to above mentioned matters and the allogenic origin of this deposit, it can be further inferred that this deposit was derived initially from alteration and weathering of basaltic to andesitic rocks and subsequently underwent erosion and transportation to its current site where by contamination by other crustal rocks occurred.…”

Section: Protolith Of the Depositmentioning

confidence: 99%

Geochemical Characteristics of Laterites: The Ailibaltalu Deposit, Iran

Abedini¹,

Calagari²,

Mikaeili³

2014

Bull.Min.Res.Exp.

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Alibaltalu laterite deposit is located ~20 km northeast of Shahindezh, south of West-Azarbaidjan province (NW of Iran). This deposit is developed as stratiform lenses along the boundary of Elika dolomites (Triassic) and Shemshak sandstones (Jurassic). The distribution fashion of minerals such as boehmite, diaspore, kaolinite, muscovite-illite, rutile, anatase, hematite and goethite in this deposit was accompanied by the development of four types of ore facies: (1) ferrite; (2) laterite; (3) bauxitic kaolinite; and (4) kaolinitic bauxite. Petrographically, the ores show conglomeratic, rounded-granular, veinlet, colloform, pelitomorphic, pseudo-porphyritic, nodular, and spongy textures. Comparison of distribution pattern of elements along a selective profile across the deposit reveals that ferrugenizationdeferrugenization mechanism played a prominent role in distribution of Al, Si, Ti, HFSE, LREEs, HREEs, U, and Th during weathering processes. Distribution pattern of REEs normalized to chondrite indicates a poor differentiation of LREEs from HREEs and generation of poor negative Eu anomaly during the evolution of this deposit. These aspects along with ratios of Al 2 O 3 /TiO 2 and intense differentiation of Al from Fe in the course of weathering processes may indicate a mafic protolith for the deposit. Geochemical consideration of low-mobile elements demonstrates that this deposit is likely resulted from alteration and weathering of basaltic to andesitic rocks. By regarding to the distribution mode of elements such as Ni, Cr, Zr, and Ga within the ores, it can be deduced that this deposit was initially formed authigenically and then later was contaminated by other rock materials during erosion and transportation from its original place to the present site. Bulletin of the Mineral Research and Explorationhttp://bulletin.mta.gov.tr

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Singh

2020

Society of Earth Scientists Series

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Genesis of certain bauxite profiles from India

Cited by 17 publications

References 1 publication

Formation of Ti-rich bauxite from alkali basalt in continental margin carbonates, Payas region, SE Turkey: implications for sea level change in the Upper Cretaceous

Formation of Ti-rich bauxite from alkali basalt in continental margin carbonates, Payas region, SE Turkey: implications for sea level change in the Upper Cretaceous

Geochemical Characteristics of Laterites: The Ailibaltalu Deposit, Iran

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