Constraints on the genesis of the Proterozoic bornite dominated copper deposit from Nim ka Thana, western India: An IOCG perspective

Sharma, Jyoti; Sahoo, Prabodha Ranjan; Mahanta, Haraman; Venkatesh, A. S.; Babu, E. V. S. S. K.; John, Manish M.

doi:10.1016/j.oregeorev.2020.103338

Cited by 7 publications

(14 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the region contains several groups of sedimentary stratiform Cu (or SSC) Kaur et al, 2017deposits that are zoned from pyrite-chalcopyrite to bornite and chalcocite and have been likened to 'redbed' Cu deposits in the Central African Copper Belt (e.g. or have affinities with IOCG deposits (Sharma et al, 2020).…”

Section: Khetri Province India -Neoproterozoic Cu-au Depositsmentioning

confidence: 99%

Iron oxide copper-gold (IOCG) deposits – A review (part 1): Settings, mineralogy, ore geochemistry and classification

Skirrow¹

2022

Preprint

View full text Add to dashboard Cite

Characteristics of ten of the world's metallogenic provinces hosting iron oxide Cu-Au (IOCG) deposits have been critically assessed, including geochronology, geological and tectonothermal evolution, alteration-mineralisation parageneses, and ore geochemistry. A new classification framework is proposed in which IOCG deposits form the major part of a global family of Cu-Au-Fe (± Co, REE) or CGI deposits that also includes Fe-rich Cu-Au deposits lacking significant iron oxides. The CGI family is subdivided on the basis of combined tectonic setting, ore geochemistry, and oxidation state of ore-related mineralogy. Three subtypes of CGI deposits have elevated REE ± U, F and Ba and/or enrichments in Co (± Ni, Bi, Se, Te), with known deposits occurring in Precambrian syn-and post-orogenic settings. A fourth subtype of CGI deposits generally lacks significant enrichments in REE, U, F, Ba, Co, Ni, Bi, Se and Te and occur mainly in Phanerozoic Andean type magmatic arc settings. The REE-and/or Co-rich CGI deposit subtypes are geologically and geochemically distinct from porphyry Cu (-Au), skarn Fe-Cu and iron oxideapatite (IOA) deposits, although there are some shared features. The low-REE-U-Co arc-hosted

show abstract

Section: Khetri Province India -Neoproterozoic Cu-au Depositsmentioning

confidence: 99%

Iron oxide copper-gold (IOCG) deposits – A review (part 1): Settings, mineralogy, ore geochemistry and classification

Skirrow¹

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…However, the mineable-scale magnetite bodies in the metasediments do not host any sulfide mineralization. On a regional scale, these metasediments host both iron ores and sulfides (deposited from a hydrothermal source) and are classified as IOCG-type deposits (Sharma et al 2020). The area, affected by metasomatism, manifests hydrothermal alteration events such as chloritization, biotization, Fe-Mg metasomatism and silicification (Knight et al 2002).…”

Section: Geology Of the Study Areamentioning

confidence: 99%

“…Mukhopadhyay, Geological Survey of India, unpub. report, 2007;Sharma et al 2020). It is considered a sub-basin of the Khetri Copper Belt (Sharma et al 2015).…”

Section: Geology Of the Study Areamentioning

confidence: 99%

“…The rocks exposed in the belt region are primarily from the Ajabgarh Group of the Delhi Supergroup, where mineralization is limited chiefly to the Kushalgarh Formation; the formation primarily consists of arenaceous, calcareous and argillaceous rocks (K. K. Behera et al, Geological Survey of India, unpub. report, 2007;Sharma et al 2020). The major rock types present in the belt area are amphibole-rich marble, scapolite-bearing metapelite, scapolite-bearing dolomitic marble and scapolite tremolite marble.…”

Section: Geology Of the Study Areamentioning

confidence: 99%

“…In these studied locations, scapolites are noticed within the metasedimentary rock units, which are closely associated with the low-grade copper deposits of this belt. The Cu mineralization is linked to a hydrothermal source with a moderate salinity and a deep source of the mineralizing fluid (Sharma et al 2020). Since the area has undergone multiple episodes of deformation and is affected by Na-metasomatism, a thorough study of the scapolite formation and its spatial and genetic relationship with the Cu mineralization would lead to the unravelling of the fluid interaction model.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evidence of ore-bearing fluid interaction with Proterozoic metasediments for the genesis of scapolite in parts of the North Delhi Fold Belt, western India

Sharma

Sahoo²,

Babu³

2022

Geol. Mag.

View full text Add to dashboard Cite

Scapolite occurrences are widely observed in the metasedimentary rocks exposed around the Khetri Copper Belt and adjoining Nim ka Thana copper mineralized area in western India. Amoeboidal to well-developed and rounded/elliptical-shaped marialitic scapolite (Na-rich end-member) rich zones with variable Cl contents ranging from 1.0 wt % to 2.9 wt % have been identified in proximity to the ore-bearing hydrothermal fluid activity zones. Although scapolite is formed as a product of regional metamorphism in many places, in this study, we propose a strong possibility that scapolite was formed by hydrothermal ore-bearing fluid interaction with metasediments. The evidence of hydrothermal activity and Cl sourcing is attributed to (i) the absence of evaporite beds in the area and no Na-rich plagioclase as inclusions within the scapolite suggesting the formation of marialitic scapolite from sodic plagioclase in the metasediments with the interacting hydrothermal fluid; (ii) an epithermal to mesothermal hydrothermal fluid with moderate salinity responsible for the Cu mineralization that is ascribed to be the source of Cl for the formation of marialitic scapolite; (iii) diffusion of SO2 in the scapolite in close association with the sulfide mineral phase (chalcopyrite) supporting the involvement of ore-bearing fluid in the development of scapolite; (iv) the absence of zoned scapolite, the spatial distribution of scapolite in a particular lithology, the occasional incorporation of sulfur into marialitic scapolite and the texture/geometry in the scapolite suggesting a broad hydrothermal linkage instead of a pure metamorphic origin.

show abstract

Fluid evolution, metal source, and ore genesis of sulfide mineralization, Nim Ka Thana Copper Belt, Rajasthan, India: evidence from mineral chemistry, fluid inclusions and sulfur isotope geochemistry

Gantait

Debnath²,

Anand³

et al. 2023

Arab J Geosci

View full text Add to dashboard Cite

Constraints on the genesis of the Proterozoic bornite dominated copper deposit from Nim ka Thana, western India: An IOCG perspective

Cited by 7 publications

References 69 publications

Iron oxide copper-gold (IOCG) deposits – A review (part 1): Settings, mineralogy, ore geochemistry and classification

Iron oxide copper-gold (IOCG) deposits – A review (part 1): Settings, mineralogy, ore geochemistry and classification

Evidence of ore-bearing fluid interaction with Proterozoic metasediments for the genesis of scapolite in parts of the North Delhi Fold Belt, western India

Fluid evolution, metal source, and ore genesis of sulfide mineralization, Nim Ka Thana Copper Belt, Rajasthan, India: evidence from mineral chemistry, fluid inclusions and sulfur isotope geochemistry

Contact Info

Product

Resources

About