Fluid Chemistry and Depositional Mechanism of the Epigenetic, Discordant Ores of the Proterozoic, Carbonate-Hosted, Zawarmala Pb-Zn Deposit, Udaipur District, India

Talluri, Jawahar Kumar; Pandalai, H. S.; Jadhav, G.N.

doi:10.2113/gsecongeo.95.7.1505

Cited by 17 publications

(32 citation statements)

References 27 publications

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“…Key variations in the trace element concentrations between different generations of pyrite and sphalerite are mentioned. Temperature of ore formation shown for Zawarmala is after Talluri et al (2000). See text for discussion.…”

Section: Discussionmentioning

confidence: 89%

“…Banded pyrite‐sphalerite, characterized by fine‐grained pyrite (Py‐I) and sphalerite (Sph‐I), are aligned with bedding (S 0 ) and schistosity (S 1 ) in siliceous dolomite (Figure 8f). At Zawarmala, regional S 1 schistosity is defined by parallelism of muscovite and sericite (Talluri et al, 2000). The thin pyrite‐sphalerite layers show intergrowth relationship with euhedral K‐feldspar (Figure 4c,d) with straight edge and sharp corners suggesting their authigenic nature (Baskin, 1956).…”

Section: Discussionmentioning

confidence: 99%

“…The banded pyrite‐sphalerite stratiform ore was deposited prior to the D 1 deformation (Talluri et al, 2000). However, the emplacement of discordant vein type ores are associated with D 2 and D 3 deformations (Talluri et al, 2000). The rock sequence in Zawarmala deposit were metamorphosed to greenschist facies (Roy, 1995), with peak temperature of 400–450°C and the pressure of approximately 3 kbar (Banerjee & Sarkar, 1998).…”

Section: Geological Settingmentioning

confidence: 99%

“…Three different types of ores, both in megascopic and microscopic scale, are visible in Zawarmala. Thin millimetre‐scale pyrite‐sphalerite bands occur parallel to bedding (S 0 ) and schistosity (S 1 ) in siliceous dolomite (Figure 4a), where regional schistosity (S 1 ) is defined by muscovite and sericite (Talluri et al, 2000). Sphalerite‐pyrite veins or patches are common in the siliceous dolomite and can be categorized as remobilized ore (Figure 4b).…”

Section: Ore Petrographymentioning

confidence: 99%

“…The ore mineralization at Rajpura‐Dariba consists of banded ore facies and vein ore facies (Deb & Pal, 2004; Mishra & Mookherjee, 1991). On the other hand, three different ore types, namely banded pyrite‐sphalerite stratiform ore, sphalerite‐galena‐rich vein and massive galena ore shoots were identified in Zawarmala (Talluri et al, 2000). The ore mineralization is hosted by calc‐silicate rocks and graphitic‐mica schist in Rajpura‐Dariba (Mishra et al, 2006) and dolomites in Zawarmala (Sarkar & Banerjee, 2004).…”

Section: Introductionmentioning

confidence: 99%

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

Bhuyan

Hazarika

2022

Geological Journal

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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.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Ore Petrographymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Bhuyan

Hazarika

2022

Geological Journal

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Palaeoproterozoic Mobile Belts in Peninsular India

Valdiya

2015

Society of Earth Scientists Series

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Migration and enrichment of trace elements of Lower Palaeozoic carbonate rock strata in Beijing

Hou

et al. 2008

Sci. China Ser. D-Earth Sci.

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Analyses of trace elements of the Lower Palaeozoic carbonate rock strata in Beijing show that the contents of As, Hg, F increase from primary carbonate rocks to weathered carbonate rocks and from primary carbonate rocks to the soil coexisting with carbonate rocks, but the distribution regularity of S is not obvious. In the whole weathered stages, the sorption of As is mainly affected by Fe 2 O 3 . In soil Fe 2 O 3 is also the main affecting factor of Hg enrichment. The main existing forms of Hg in primary carbonate rocks should simply be physical adsorption, coprecipitation and false isomorphous form between surface of carbonate rock and Hg. In soil the enrichment of F has little relationship with sulfides and Fe 2 O 3 . In primary carbonate rocks, F is mainly absorbed by sulfides and clay minerals, etc. Weathered samples have closer genetic relationships with primary carbonate rocks. This also implies that weathered carbonate rocks have the close existing forms to that of primary carbonate rocks. In primary carbonate rocks FeS 2 and FeS are the main forms of S, and sulfides have fixation effect on some heavy metals, whereas in weathered carbonate rocks and soil the fixation effect is weakened. carbonate rocks, trace elements, Fe 2 O 3 , sulfide, clay mineral, enrichment As long geologic evolution processes and human activities accelerate the migration and enrichment of the harmful elements of primary carbonate rock, a series of ecologic problems emerged [1,2] . Numerous studies have been done about the heavy metal elements of the carbonate rock mines, waste rocks, residuals and soils [3][4][5][6][7][8][9] , but the systematic studies of trace elements have seldom done in primary carbonate rocks-weathered carbonate rocks-soil coexisting with carbonate rocks. This study focuses on the Lower Palaeozoic carbonate rocks in Beijing in order to uncover migration and enrichment of the trace elements such as As, Hg, S and F by comparing the contents of As, Hg, S, F in primary carbonates, weathered carbonate rocks and soil coexisting with carbonate rocks. Based on the different correlations between different elements combined with photomicrographic studies, migration and enrichment of the trace elements are discussed.

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Fluid Chemistry and Depositional Mechanism of the Epigenetic, Discordant Ores of the Proterozoic, Carbonate-Hosted, Zawarmala Pb-Zn Deposit, Udaipur District, India

Cited by 17 publications

References 27 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

Palaeoproterozoic Mobile Belts in Peninsular India

Migration and enrichment of trace elements of Lower Palaeozoic carbonate rock strata in Beijing

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