Fluid inclusion and geochemical signatures of the talc deposits in Kanda area, Kumaun, India: implications for genesis of carbonate hosted talc deposits in Lesser Himalaya

Joshi, Prabha; Sharma, Rajesh

doi:10.1007/s13146-014-0196-3

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…The majority of the talc mineralization occurs from the hydrothermal alteration of Mg-carbonate and serpentines [82], while some minor deposits can also result from Mgrich sedimentary rocks [83]. The mineralogy of talc deposits depends on protolith, fluid composition, and pressure/temperature during mineralization.…”

Section: Mechanism Of Talc Formationmentioning

confidence: 99%

Can Imaging Spectroscopy Divulge the Process Mechanism of Mineralization? Inferences from the Talc Mineralization, Jahazpur, India

et al. 2023

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Talc deposits of Jahazpur, Rajasthan, hosted by dolomite, are one of the largest high-quality talc deposits in India. In the present study, we use AVIRIS-NG datasets to study the link between the spatial pattern of talc mineralization, associated alteration minerals, and iron-oxide enrichment. It is noted that the majority of talc-bearing areas are characterized by the presence of clay minerals, such as an intimate mixture of kaolinite and muscovite, illite, dickite (indicative of phyllic and argillic alteration), and also enhanced iron enrichment. The talc-bearing zones are located adjacent to quartz-rich lithologies, and they are aligned along the Jahazpur thrust. Based on mineralogical and geological evidence, hydrothermal alteration of dolomites by silica and iron-rich fluid is proposed as major factorcontrolling talc mineralization. This study has implications for the identification of prospective zones of talc mineralization using imaging spectroscopy.

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Section: Mechanism Of Talc Formationmentioning

confidence: 99%

Can Imaging Spectroscopy Divulge the Process Mechanism of Mineralization? Inferences from the Talc Mineralization, Jahazpur, India

et al. 2023

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“…Magnesite is one of the best raw materials for refractory industries and occurs in a wide variety of marine and nonmarine geological settings [1]. After a century of research, the magnesium in (hydro) magnesite deposits has been considered to originate from (1) seawater [2][3][4][5][6][7][8], (2) Mg-rich precursor carbonates in and outside magnesite occurrences [9][10][11], or (3) the transformation and weathering of ultramafic complexes [12][13][14][15][16][17][18]. The traditional classifications of magnesite deposits are "Veitsch type" and "Kraubath type" after localities in Austria and Slovakia [2,19].…”

Section: Introductionmentioning

confidence: 99%

Genesis of the Large-Scale Kamado Magnesite Deposit on the Tibetan Plateau

Yu,

Hu,

Chen

et al. 2023

Minerals

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Lacustrine strata-bound magnesite deposits associated with Alpine-type ultramafic rocks are hydrothermal in origin. The magnesite ores of the Kamado deposit are unconformably underlain by mid-Jurassic marine carbonate and ultramafic rocks of the Bangong-Nujiang ophiolite suite and are in fault contact with hanging wall rocks composed of siliceous sinter. Three types of cryptocrystalline magnesite ores can be identified in Kamado: (1) strata-bound massive magnesites, representing the main ore type in the upper part; (2) banded ores in the lower part; and (3) some vein and stockwork ore in the ultramafic wall rocks. Integrated scanning electron microscopy, C–O isotope analysis, and geochemical analyses were carried out on the Kamado deposit. The results indicate that: (1) the orebody is composed of magnesite, with accessory minerals of aragonite, opal, and chromite; (2) the siliceous sinter and relatively high B (32.0–68.1 ppm) and Li (14.7–23.4 ppm) contents of the magnesite ores reflect long-term spring activity in Kamado; (3) the light carbon (δ13CV-PDB: −4.7 ± 0.3‰ to −4.1 ± 0.6‰) and oxygen isotopic compositions (δ18OV-SMOW: +12.3 ± 0.3 to +16.3 ± 0.1‰) of the stockwork ores in the foot wall rocks indicated that the carbon in fractures in the ultramafic rocks is from a mixture of marine carbonate and oxidized organic-rich sedimentary rocks, reflecting a typical “Kraubath-type” magnesite deposit; and (4) the relatively heavy carbon isotopic (δ13CV-PDB: +8.7 ± 0.4‰ to +8.8 ± 0.3‰) composition of the banded magnesite ores in the lower segment may have formed from heavy CO2 generated by anaerobic fermentation in the lakebed. Additionally, the carbon isotopic (δ13CV-PDB: +7.3 ± 0.3‰ to +7.7 ± 0.7‰) composition of the massive magnesite ores in the upper segment indicates a decline in the participation of anaerobic fermentation. As this economically valuable deposit is of the strata-bound massive ore type, Kamado can be classified as a lacustrine hydrothermal-sedimentary magnesite deposit, formed by continuous spring activities under salt lakes on the Tibetan Plateau, with the Mg mainly being contributed by nearby ultramafic rocks and the carbon mainly being sourced from atmosphere-lake water exchange, with minor amounts from marine carbonate strata.

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Lithostratigraphy, Petrography and Metamorphism of the Lesser Himalayan Sequence

Groppo

Rolfo

Tamang

et al. 2023

Himalaya, Dynamics of a Giant 2

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Fluid inclusion and geochemical signatures of the talc deposits in Kanda area, Kumaun, India: implications for genesis of carbonate hosted talc deposits in Lesser Himalaya

Cited by 6 publications

References 16 publications

Can Imaging Spectroscopy Divulge the Process Mechanism of Mineralization? Inferences from the Talc Mineralization, Jahazpur, India

Can Imaging Spectroscopy Divulge the Process Mechanism of Mineralization? Inferences from the Talc Mineralization, Jahazpur, India

Genesis of the Large-Scale Kamado Magnesite Deposit on the Tibetan Plateau

Lithostratigraphy, Petrography and Metamorphism of the Lesser Himalayan Sequence

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