Geochemistry of Fe-Ti oxide and sulfide minerals in gabbroic rocks and magnetitite of the Archean Mayurbhanj mafic complex (eastern India): Magma fractionation, thermometry and oxygen fugacity of re-equilibration, and implications for Ni-Cu mineralization

Bhattacharjee, C. C.; Mondal, Sisir K.

doi:10.1016/j.oregeorev.2021.104005

Cited by 10 publications

(4 citation statements)

References 74 publications

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“…Ph.D. thesis, China Univ. Geosciences, 2016) in the magnetite of the QMC rocks, indicating equilibration with co-magmatic sulfide mineral assemblages (Bhattacharjee & Mondal, 2021).…”

Section: Analytical Resultsmentioning

confidence: 99%

“…Additionally, abundant apatite inclusions in the clinopyroxenes (Fig. 4c, d) and phosphate ores indicate the basaltic parental magma of the QMC was also rich in P. Experimental studies have found that when hornblende crystals occur during magma evolution, the magma must contain 2-5 % H 2 O and the H 2 O content of the parental magma must exceed 2 % (Botcharnikov et al 2008;Howarth & Prevec, 2013). The QMC contains a lot of H 2 O-rich minerals, such as hornblende, biotite and hydroxylapatite, indicating that the basaltic parental magma is rich in H 2 O and the mantle source might be metasomatized by fluids.…”

Section: C Parental Magma Characteristics and Sourcesmentioning

confidence: 99%

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Petrogenesis and metallogenesis of the Qieganbulake carbonatite-related phosphate deposit associated with the mafic–ultramafic–carbonatite complex in the Kuluketage block, northeastern Tarim Craton

et al. 2023

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The Qieganbulake deposit associated with a mafic–ultramafic–carbonatite complex in the Kuluketage block is not only the world’s second-largest vermiculite deposit, but also a medium-size carbonatite-related phosphate deposit. Field observations, radiometric dating results and Sr–Nd–Hf isotopes reveal that the parental magmas of the carbonatite and mafic–ultramafic rocks are cogenetic and formed synchronously at c. 810 Ma. Geochemical characteristics and Sr–Nd–Hf–S isotopes ((87Sr/86Sr)i = 0.70581–0.70710; ϵNd(t) = −0.20 to −11.80; ϵHf(t) = −7.5 to −10.3; δ34S = +0.7 ‰ to +3.0 ‰ (some sulfides with high δ34S values (+3.2 to +6.6) were formed by late hydrothermal sulfur)), in combination with mineral compositions and previous research, strongly indicate that the Qieganbulake mafic–ultramafic–carbonatite complex formed via extensive crystal fractionation/cumulation and liquid immiscibility of a carbonated tholeiitic magma, possibly derived from partial melting of an enriched subcontinental lithospheric mantle previously modified by slab-released fluids and sediment input in a continental rift setting. The coupled enriched Sr–Nd isotopic signatures, in combination with previous research, suggest that the enriched subcontinental lithospheric mantle could have been metasomatized by asthenospheric mantle melts to different degrees. The Qieganbulake carbonatite-related phosphate ores were the products of normal fractional crystallization/cumulation of P–Fe3+ complex enriched carbonatite magma in high oxygen fugacity conditions, which was generated by liquid immiscibility of CO2–Fe–Ti–P-rich residual magma undergoing high differentiation.

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“…Ph.D. thesis, China Univ. Geosciences, 2016) in the magnetite of the QMC rocks, indicating equilibration with co-magmatic sulfide mineral assemblages (Bhattacharjee & Mondal, 2021).…”

Section: Analytical Resultsmentioning

confidence: 99%

Section: C Parental Magma Characteristics and Sourcesmentioning

confidence: 99%

Petrogenesis and metallogenesis of the Qieganbulake carbonatite-related phosphate deposit associated with the mafic–ultramafic–carbonatite complex in the Kuluketage block, northeastern Tarim Craton

et al. 2023

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“…(Supplementary 3 ), indicating that; the fractional crystallization occurs in parental magma 39 . The negative correlation between the An content of plagioclase and Mg# of clinopyroxene reflect the preferred Ti from the melt phase during plagioclase and pyroxene crystallization 40 (Fig. 11 f).…”

Section: Discussionmentioning

confidence: 98%

Integrating mineralogy, geochemistry and aeromagnetic data for detecting Fe–Ti ore deposits bearing layered mafic intrusion, Akab El-Negum, Eastern Desert, Egypt

Kharbish

Eldosouky²,

Amer³

2022

Sci Rep

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This study delineated the Fe–Ti oxide deposit concurrencies on the layered mafic intrusion in Gabal Akab El-Negum (GAN), South Eastern Desert, Egypt, using aeromagnetic mapping and chemical analysis of the hosted mafic rocks and mineralogical studies. Aeromagnetic data was improved using the enhanced horizontal gradient amplitudeto detect the primary structures (edges/contacts/faults) that control the distribution of Fe–Ti ore deposit. GAN layered gabbros are differentiated into troctolite, olivine–, pyroxene–, and hornblende–gabbros. These mafic rocks primarily comprise plagioclase, olivine, pyroxene, and hornblende with Fe–Ti ores (magnetite and ilmenite). The significant variation in Mg# of clinopyroxene between 0.70 and 0.82 indicates the importance of fractional crystallization in developing layered mafic intrusion. Clinopyroxene and plagioclase thermometry yielded low temperatures similar to the fractionated primary basaltic magma. The pairs of magnetite–ilmenite minerals in gabbros provide equilibrium temperatures of 539.44–815.56, and high fO2, reflecting various cooling and subsolidus reequilibration phases of minerals. The enrichment of GAN gabbros in light rare–earth elements relative to heavy rare–earth elements indicates the interaction between the Fe–Ti rich mantle and the fractionated tholeiitic magmas in the back-arc setting, generating Fe–Ti oxide ores.

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“…The Ti‐Al cross‐plot has most sample points between the granite and basalt trajectories indicating a predominant mixed mafic‐felsic provenance (Figure 4a), which includes metamorphosed equivalents of primary mafic and felsic rocks. Ti and Al are useful indicators of mafic and felsic provenance (Andersson & Worden, 2004) as Ti is enriched in basaltic rocks and Al is enriched in felsic rocks (Bhattacharjee & Mondal, 2021; Krauskopf, 1979). Ti and Al are both relatively stable and immobile elements under conditions of weathering and transport, hence are useful indicators of provenance in sediments (Hallberg, 1984).…”

Section: Discussionmentioning

confidence: 99%

Hinterland environments of the Late Jurassic northern Weald Basin, England

Barshep

Worden

2023

Geological Journal

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Reconstructing provenance in sandstones can be challenging, especially when the hinterland palaeogeology is unknown due to burial, diagenesis or weathering of the original outcrops. As sedimentary processes alter the distribution of minerals in the depositional environment, the use of multiple provenance methods reduces uncertainties, because, together, they can account for depositionally‐controlled textural and mineralogical re‐distribution in a basin. Here, we have applied petrography, X‐ray fluorescence geochemistry and sedimentology to understand the provenance of shallow marine Corallian sandstones with the aim of deducing the palaeogeology, palaeoenvironment and sediment distribution within the northern parts of the Upper Jurassic Weald Basin, onshore UK. The Corallian sandstones had a mixed mafic‐felsic (intermediate), metasedimentary recycled orogen source. The hinterland experienced significant physical and chemical weathering under humid conditions. Corallian sandstones were relatively more chemically mature up‐dip and more texturally mature down‐dip. Chemically unstable grains and heavy minerals were relatively concentrated down‐dip. Heterogeneous, sedimentologically‐controlled mineral distribution patterns highlight potential errors which may be made in deriving source‐area maturity. This study is significant as it illustrates the combined roles of provenance and deposition in controlling primary mineral distribution that then influenced the style of burial diagenesis. The work presented here emphasizes the importance of a multi‐proxy approach to improve provenance analysis.

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Geochemistry of Fe-Ti oxide and sulfide minerals in gabbroic rocks and magnetitite of the Archean Mayurbhanj mafic complex (eastern India): Magma fractionation, thermometry and oxygen fugacity of re-equilibration, and implications for Ni-Cu mineralization

Cited by 10 publications

References 74 publications

Petrogenesis and metallogenesis of the Qieganbulake carbonatite-related phosphate deposit associated with the mafic–ultramafic–carbonatite complex in the Kuluketage block, northeastern Tarim Craton

Petrogenesis and metallogenesis of the Qieganbulake carbonatite-related phosphate deposit associated with the mafic–ultramafic–carbonatite complex in the Kuluketage block, northeastern Tarim Craton

Integrating mineralogy, geochemistry and aeromagnetic data for detecting Fe–Ti ore deposits bearing layered mafic intrusion, Akab El-Negum, Eastern Desert, Egypt

Hinterland environments of the Late Jurassic northern Weald Basin, England

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