Analytical formulation of phase equilibria in two observed sulfide-sulfosalt assemblages in the Rajpura-Dariba polymetallic deposit, India

Mishra, Biswajit; Mookherjee, Asoke

doi:10.2113/gsecongeo.81.3.627

Cited by 17 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The abnormally elevated and correlated peaks of Pb, Cu, Ag, Sb and Tl (Figure 6a,b,d,e) in all pyrite types, except for Py‐IIb, advocates occurrence of micro to nanoscopic inclusions of Tl‐Pb‐Sb‐Cu‐Ag sulfosalt (e.g., routhierite; Biagioni et al, 2013) or galena (enriched in Tl, Sb, Ag and Cu). The occurrence of dyscrasite (Ag 3 Sb) and, bournonite and boulangerite were previously reported from the vein‐type and banded ores, respectively in Rajpura‐Dariba (Mishra & Mookherjee, 1986; Pruseth et al, 2014). In addition, Ag‐rich tetrahedrite associated with galena and other sulfosalts are not uncommon in sediment‐hosted Pb‐Zn and syn‐metamorphic vein‐type base metal deposits (Cook et al, 1998), and may account for the correlated Ag, Cu and Sb distributions.…”

Section: Resultsmentioning

confidence: 75%

“…and Cu). The occurrence of dyscrasite (Ag 3 Sb) and, bournonite and boulangerite were previously reported from the vein-type and banded ores, respectively in Rajpura-Dariba (Mishra & Mookherjee, 1986;Pruseth et al, 2014). In addition, Ag-rich tetrahedrite associated with galena and other sulfosalts are not uncommon in sediment-hosted Pb-Zn and syn-metamorphic vein-type base metal deposits (Cook et al, 1998) therefore, Pb in pyrite mostly occurs as galena inclusions (Huston et al, 1995).…”

Section: Pyritementioning

confidence: 70%

“…The LA profiles of Pb, Ag, Sb and Tl display correlated spikes in Sph‐I and II (Figure 7a,b), advocating occurrence of micro‐ to nanoscopic inclusions of Pb‐Sb‐Ag‐Tl‐bearing sulfosalt (cf. Mishra & Mookherjee, 1986; Pruseth et al, 2014) or galena, enriched in Sb, Ag and Tl. Sph‐III, in contrast, shows relatively flat LA profile for Pb, Ag and Sb, with occasional spikes (Figure 7c), indicating their homogeneous distribution in the sphalerite structure to a large extent.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Ore genetic implications of pyrite and sphalerite compositions fromRajpura‐Daribaand ZawarmalaPb‐Zndeposits, Northwestern India

Bhuyan

Hazarika

2022

Geological Journal

View full text Add to dashboard Cite

We have studied different generations of pyrite (Py-I, II and III) and sphalerite (Sph-I, II and III), associated with ore mineralization and remobilization stages, from both the deposits. In Rajpura-Dariba, high concentrations of the majority of trace elements in syngenetic Py-I and Sph-I suggest their formation from trace element enriched hydrothermal fluid in SEDEX environment. Enrichment of lattice bound elements in Py-II (As, Co, Ni) and Sph-II (Mn, Hg and Cd) during metamorphic recrystallization of early pyrite and sphalerite indicates their local derivation from host rocks. The Pb, Tl, Ag and Sb rich Py-III and Sph-III in discordant ore indicate their crystallization from low melting-point chalcophile elements enriched sulfide melt. In Zawarmala, the trace element poor natures of diagenetic banded Py-I and Sph-I suggest that the initial ore-forming fluid was depleted in trace elements. Enrichment of trace elements in Py-II (As, Mn, Tl, Cu) and Sph-II (Mn, Hg, As, Ga) in sphalerite-pyrite vein ore signify their derivation from carbonate host rocks. The high abundance of trace elements in Py-III and Sph-III indicates their precipitation at lower temperatures from a trace element enriched hydrothermal fluid during the massive galenasphalerite ore formation. Pyrite and sphalerite from global SEDEX are trace elements enriched as compared to MVT deposits, where their compositions have remarkably correlation with host rocks. Our study highlights the influence of host rock in pyrite and sphalerite compositions and their ore genetic implications.

show abstract

Section: Resultsmentioning

confidence: 75%

Section: Pyritementioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Ore genetic implications of pyrite and sphalerite compositions fromRajpura‐Daribaand ZawarmalaPb‐Zndeposits, Northwestern India

Bhuyan

Hazarika

2022

Geological Journal

View full text Add to dashboard Cite

show abstract

“…2) and produces maximal accord with petrological constraints discussed below. For this estimated wFAH AsSb, the following optimal values for the remaining two parameters in equation (2) As-Sb partitioning relations between fahlore and bournonite-seligmannite solid solutions in the Rajpura-Dariba polymetallic deposit, Poona, India (Mishra and Mookherjee, 1986) and the Julcani mining district, Peru (Goodell and Petersen, 1974) provide evidence that W~As~ is near the upper boundary established from the experimental data, 4.8 kcal/gfw. Assuming that the entropy of the As-Sb exchange reaction (eq.…”

Section: Resultsmentioning

confidence: 88%

As-Sb Exchange Energies in Tetrahedrite-Tennantite Fahlores and Bournonite-Seligmannite Solid Solutions

Sack

Ebel

1993

Mineral. mag.

View full text Add to dashboard Cite

Reversed brackets on As and Sb partitioning between tetrahedrite-tennantite fahlores {--CUlo(Fe,Zn)2(Sb,As)4S13} and bournonite-seligmannite solid solutions {CuPb(Sb,As)S3} (400 ~ evacuated silica tubes, NH4CI flux) indicate that the maximum nonidealities associated with the As-Sb substitution are about 165 (bournonite) and 250 (fahlore) cal/gfw on a per atom exchange basis. The experimental constraints are consistent with the following calibration of the As-Sb exchange reaction between these phases: kcal/gfw, X2 -Zn/(Zn + Fe) (or one-half the number of Zn atoms/formula unit) and X3 -As/(As + Sb) refer to atomic ratios in fahlore, and AG~3-o = AH23 = 2.59 _+ 0.14 kcal/gfw (Raabe

show abstract

“…The conventional methods have their place, but these are proving to be less effective as new terrains are increasingly more difficult to explore. Study of ore forming processes of sulfides and their relationship with volcano-sedimentary succession in Sindesar Khurd, Rajpura Dariba belt, Rajsamand District, Rajasthan was taken up by Samaddar (1987), Yadav and Sharma (1989), Misra, B and Mookerjee, A. (1984), Deb and Pal (2004).…”

Section: Introductionmentioning

confidence: 99%

Re-exploration of Rajpura Dariba Belt for Zn-Pb

Yadav¹

2017

View full text Add to dashboard Cite

Abstract. In the recently drilled deeper boreholes by HZL new intersection of lead and zinc ores have established depth ward continuity of ores of previous boreholes and have thus augmented reserves considerably. It has suggested revision of ore forming concepts and also that in the Rajpur Dariba area further search for Zn-Pb should be carried out using new innovative techniques. Success often requires supplementing standard procedures with the effective use of new exploration methods: the kind that can see deeper, are more definitive, and more efficient to ore discovery. The conventional methods have their place, but these are proving to be less effective as new terrains are increasingly more difficult to explore. Present studies have helped in searching new controls of mineralisation and in formulation of new ore guides for future search of new ore bodies. On the basis of present studies like facies of volcano-sedimentary sequence, textures, structures, ore microscopy, environment of ore deposition, characters of mineralisation, ore facies, sequence stratigraphy, airborne and ground geophysics new evidences for ore genesis have been collected. In Sindesar Khurd these studies have suggested vent complex type of hydrothermal sedex deposit. Rajpura Dariba deposit displays biphase mineralisation including stratiform sulphides and post metamorphic epigenitacally melt introduced independently. Salient features of vein ores such as occurrences as pods, segregation veins or open space fillings traversing the banded ores, absence of deformation and recrystalisation textures indicate that these veins are post-metamorphic and could have formed from a different ore fluid. The cavity filling nature of vein ore and their occurrence in irregular shear planes suggest their environment of ore formation was different than imprints of metamorphism in banded ores. The source of this fluid could be intrusive granite located during present studies. Now with an objective of searching new ore zones more evidences like faults and shear zones which are loci for ore in volcanoclastic rocks and calc silicate marble is the best host. Other evidences of ore forming processes and characters of volcanic rocks are also helpful in ore search. These strategies are discussed in this paper to search new local targets for selecting new drill sites.

show abstract

Analytical formulation of phase equilibria in two observed sulfide-sulfosalt assemblages in the Rajpura-Dariba polymetallic deposit, India

Cited by 17 publications

References 0 publications

Ore genetic implications of pyrite and sphalerite compositions fromRajpura‐Daribaand ZawarmalaPb‐Zndeposits, Northwestern India

Ore genetic implications of pyrite and sphalerite compositions fromRajpura‐Daribaand ZawarmalaPb‐Zndeposits, Northwestern India

As-Sb Exchange Energies in Tetrahedrite-Tennantite Fahlores and Bournonite-Seligmannite Solid Solutions

Re-exploration of Rajpura Dariba Belt for Zn-Pb

Contact Info

Product

Resources

About