PGE mineralization in the late Archaean iron-rich mafic-ultramafic Hanumalapur Complex, Karnataka, India

Alapieti, T. T.; Devaraju, T. C.; Kaukonen, R. J.

doi:10.1007/s00710-007-0211-7

Cited by 13 publications

(8 citation statements)

References 9 publications

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“…Occurrence of scattered ultramafic enclaves has been reported by earlier workers (Alapieti 2008). These ultramafic enclaves are situated around Rangapura, Shivani and also in the SE part of the study area.…”

Section: Geological Setupmentioning

confidence: 71%

Spatial analysis of fluoride concentration in groundwaters of Shivani watershed area, Karnataka state, South India, through geospatial information system

et al. 2011

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Hydrogeochemical investigations with emphasis on groundwater fluoride concentrations were carried out in the Shivani watershed area, Karnataka, South India. This drought-prone watershed is characterised by poor groundwater potential and is composed of different lithounits like gneisses, migmatites, tonalites, mafics-ultramafics, conglomerates and quartzites. Analysis of spatial variation of groundwater fluoride concentration through the use of GIS technology software platforms like ArcView 3.2a and MapInfo Professional 8.5 has enabled the identification of low-fluoride and high-fluoride areas within the watershed. Geochemical data indicates that 38% of groundwater samples have excessive fluoride concentration which poses a health risk to the population of the area. Correlation studies indicate that higher groundwater alkalinity activates leaching of fluoride resulting in elevated concentrations of fluoride. No other significant geochemical interrelationship could be identified between fluoride and rest of the physico-chemical parameters owing to the lack of any significant correlation coefficients. This holds good in the case of both low-fluoride (\1.5 mg/L) and high-fluoride ([1.5 mg/L) groundwaters of the watershed. However, differential or non-uniform type (positive or negative) of coefficient of correlation is observed between fluoride at different levels and other physico-chemical parameters. Among the different lithounits of the study area, gneisses house comparatively more number of high-fluoride groundwaters. Fluoride-bearing minerals biotite, hornblende and apatite are the probable natural sources of groundwater fluoride.

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Section: Geological Setupmentioning

confidence: 71%

Spatial analysis of fluoride concentration in groundwaters of Shivani watershed area, Karnataka state, South India, through geospatial information system

et al. 2011

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“…In the Singhbhum Craton, the same mineralization is known in the Noamundi area, with the Joda and Noamundi deposits as typical examples. In addition, the Cr-Ni-Co deposits (Naushahi) related to ultramafic rocks, serpentinites, and talceserpentine schists occurred in the Sukinda area in the Singhbhum Craton (e.g., Stein et al, 2004;Mondal et al, 2006;Ghosh and Mukhopadhyay, 2007;Alapieti et al, 2008;Turchenko et al, 2009;Shi et al, 2010).…”

Section: Precambrian Metallogenesis Of the Indmentioning

confidence: 97%

Correlations between the North China Craton and the Indian Shield: Constraints from regional metallogeny

Chen

et al. 2015

Geoscience Frontiers

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a b s t r a c tThe correlation between the North China Craton (NCC) and the Indian Shield (IND) has been a hot topic in recent years. On the basis of ore deposit databases, the NCC and IND have shown broad similarity in metallogenesis from the middle Archaean to the Mesoproterozoic. The two blocks both have three major metallogenic systems: (1) the Archaean BIF metallogenic system; (2) the Paleoproterozoic Cu-Pb-Zn metallogenic system; and (3) the Mesoproterozoic Fe-Pb-Zn system. In the north margin of the NCC and the west margin of the IND, the Archaean BIF-Au-Cu-Pb-Zn deposits had the same petrogenesis and host rocks, the Paleoproterozoic Cu-Pb-Zn deposits were controlled by active belts, and the Mesoproterozoic Fe-Pb-Zn deposits were mainly related to multi-stage rifting. Matching regional mineralization patterns and geological features has established the continental assembly referred to as "NCWI", an acronym for the north margin of the NCC (NC) and the west margin of the IND (WI) during the middle Archaean to the Mesoproterozoic. In this assembly, the available geological and metallogenic data from the Eastern Block and active belts of NC fit those from the Dharwar craton and the AravallieDelhi eVindhyan belt of WI, respectively. Moreover, the depositional model and environment of Paleoproterozoic metasedimentary manganese deposits in NCWI implied that the assembly may be located at low latitudes, where the conditions were favorable for dissolving ice and precipitating manganese deposits.Ó 2015, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

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“…A more detailed and thorough examination of CMUC was triggered by the discovery of ore level PGE mineralization in the chromiferous zone of HPB [21,22]. The exploration for PGE held sustained interest of TCD and TTA over a prolonged period from 1993 to 2007 resulting in the generation of a large amount of data not only for the PGE mineralized zone but also for the closely associated V-Ti magnetite and the host CMUC as a whole [23][24][25].…”

Section: Previous Workmentioning

confidence: 99%

“…An attempt is made here to reconstruct the evolution of the complex. This has been done based on the best of information gathered for Hanumalapur block of the Tavarekere segment, which not only includes an association of V-Ti-and Cr-magnetite ore bodies but also (ore level) PGE mineralization [23,25]. The HPB shows the largest variation recorded in the complex and encompasses within it a fuller history of the complex.…”

Section: An Overview Of Petrogenetic Evolution Of Cmuc and The Associmentioning

confidence: 99%

Mineralogy, geochemistry and petrogenesis of the V-Ti-bearing and chromiferous magnetite deposits hosted by Neoarchaean Channagiri Mafic-Ultramafic Complex, Western Dharwar Craton, India: Implications for emplacement in differentiated pulses

et al. 2014

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The Channagiri Mafic-Ultramafic Complex occupies lowermost section of the Neoarchaean Shimoga supracrustal group in the Western Dharwar Craton. It is a segmented body occupying the interdomal troughs of granitoids. The magnetite deposits occur in the northeastern portion; typically occupying the interface zone between gabbro and anorthositic. Mineralogically, the deposits are simple with abundant magnetite and ilmenite. Hogbomite is a consistent minor mineral. Magnetites are typically vanadiferous (0.7–1.25% V2O5). Ilmenite consistently analyses more MgO and MnO than coexisting magnetite. Chlorite, almost the only silicate present; lies in the range of ripidolite, corundophilite and sheridanite. The chromiferous suit occupying eastern side of Hanumalapur block (HPB) contains Fe-Cr-oxide analysing 37.8–11.9% Cr2O3 and 40.5–80% FeOt. In these too, chlorite, typically chromiferous (0.6–1.2% Cr2O3), is the most dominant silicate mineral. Geochemistry of V-Ti-magnetite is dominated by Fe, Ti and V with Al, Si, Mg and Mn contributing most of the remaining. Cr, Ni, Zn, Co, Cu, Ga and Sc dominate trace element geochemistry. The Cr-magnetite is high in Cr2O3 and PGE. Two separate cycles of mafic magmatism are distinguished in the CMUC. The first phase of first cycle, viz., melagabbro-gabbro, emplaced in the southeastern portion, is devoid of magnetite deposits. The second phase, an evolved ferrogabbroic magma emplaced in differentiated pulses, occupying northeastern portion of the complex, consists of melagabbro→gabbro-anorthosite→V-Ti magnetite→ferrogabbro sequence. Increase in oxygen fugacity facilitated deposition of V-Ti magnetite from ferrogabbroic magma pulse emplaced in late stages. The second cycle of chromiferous PGE mineralized suite comprises fine-grained ultramafite→alternation of pyroxinite-picrite→Crmagnetite sequence formed from fractionation of ferropicritic magma. HPB also includes >65m thick sill-like dioritic phase at the base of the ferriferous suit and a sinuous band of coarse-grained ultramafite enclosed within the chromiferous suit; both unrelated to the two mafic magmatic cycles.

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PGE mineralization in the late Archaean iron-rich mafic-ultramafic Hanumalapur Complex, Karnataka, India

Cited by 13 publications

References 9 publications

Spatial analysis of fluoride concentration in groundwaters of Shivani watershed area, Karnataka state, South India, through geospatial information system

Spatial analysis of fluoride concentration in groundwaters of Shivani watershed area, Karnataka state, South India, through geospatial information system

Correlations between the North China Craton and the Indian Shield: Constraints from regional metallogeny

Mineralogy, geochemistry and petrogenesis of the V-Ti-bearing and chromiferous magnetite deposits hosted by Neoarchaean Channagiri Mafic-Ultramafic Complex, Western Dharwar Craton, India: Implications for emplacement in differentiated pulses

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