Isotope (C and O) composition of auriferous quartz carbonate veins, central lode system, Gadag Gold Field, Dharwar Craton, India: Implications to source of ore fluids

Swain, S.K.; Sarangi, Sanat; Srinivasan, R.; Sarkar, Anindya; Bhattacharya, S. N.; Patel, Suresh C.; Pasayat, R.M.; Sawkar, R. H.

doi:10.1016/j.oregeorev.2015.03.020

Cited by 26 publications

(2 citation statements)

References 58 publications

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“…Further, these authors propose that the Jonnagiri deposit is similar to the granitoid-hosted gold deposits in the Jiadong Peninsula, North China craton, characterized by nonmetamorphic (magmatic) fluid source, contrary to previous studies on Jonnagiri (Chinnasamy and Mishra, 2013) and many granitoid-hosted orogenic gold deposits, elsewhere in the world (Saravanan et al, 2009). Swain et al (2015) undertook a C-and Oisotopic study of carbonates in auriferous quartzcarbonate veins from various mines in the Gadag Gold Field, western Dharwar Craton. The above authors argued that this set of calculated C-isotopic composition could not have resulted by metamorphic devolatilization of greenstones and they rather reflect mantle/magmatic derived CO 2 or carbonates.…”

Section: Goldmentioning

confidence: 60%

Magmatic and Hydrothermal Ore Deposits

Mishra¹

2020

PINSA

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This article briefly reviews all contributions by Indian geoscientists between the period 2015 and 2019, in the field of magmatic and hydrothermal ore deposits. The contributions covered are mainly on deposits and prospects of chromite, PGE, gold and uranium. Very few contributions have been made on base metals. However, experimental sulfide phase equilibrium research, related to metamorphic remobilization of massive sulfides, has continued with its modest initiation.

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Section: Goldmentioning

confidence: 60%

Magmatic and Hydrothermal Ore Deposits

Mishra¹

2020

PINSA

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“…The calculated δ 13 C fluid and δ 18 O fluid values can be used to trace the source of hydrothermal fluids (e.g., Ohmoto and Goldhaber, 1997;Shen et al, 2007;Swain et al, 2015;Du et al, 2017) and Hoefs, 1993), indicating an apparently magmatic origin of the Balingshan hydrothermal fluids.…”

Section: Characteristics and Source Of Hydrothermal Fluidsmentioning

confidence: 99%

Geochronology, Geochemistry, Fluid Inclusion and C, O Isotope Compositions of Calcite Veins in the Paleogene of the Jiangling Basin, South China: Implications for Fluid Evolution and Brine Potash Mineralization

WANG

LIU

et al. 2023

Acta Geologica Sinica (Eng)

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Deep‐seated potassium‐rich brines were identified in the Jiangling Basin, South China. Although magmatic‐hydrothermal sources have been proposed, the relationship between brine‐type potash mineralization and volcanism remains unclear. In this study, U‐Pb geochronology, geochemistry, fluid inclusion and C‐O isotopic compositions of hydrothermal vein minerals in the Jiangling Basin are examined. Laser ablation U‐Pb dating of calcite veins indicates that the ages are slightly younger than the formation age of the Balingshan basalt. Fluid inclusions in hydrothermal minerals show medium–low homogenization temperatures (160–220°C) and low salinities (0.14 to 4.9 wt% NaCl eqv.) and densities (0.882–0.944 g/cm3). The liquid compositions of fluid inclusions in calcite veins from sedimentary strata have higher contents of potassium, compared with those from basalt. The coupled negative δ13CPDB (–10.3‰ to −8.0‰) and positive δ18OSMOW (17.4‰ to 20.7‰) values imply that calcite precipitation resulted from CO2 degassing of the basaltic magmatic fluids, as indicated by the gas composition of these inclusions in hydrothermal minerals. Rare earth element patterns indicate that water‐rock interaction between hydrothermal fluids and sedimentary wall rocks contributed to the calcite precipitation in sedimentary strata. It is proposed that high‐temperature water‐rock interaction between magmatic fluids and sedimentary strata resulted in the potassium enrichment in fluids, interpreted as one of the sources of potassium‐rich brines in the Jiangling Basin.

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