Element geochemistry and neodymium isotope systematics of the Neoarchean banded iron formations in the Qingyuan greenstone belt, North China Craton

Peng, Zidong; Wang, Changle; Tong, Xiaoxue; Zhang, Lianchang; Zhang, Banglu

doi:10.1016/j.oregeorev.2018.09.008

Cited by 30 publications

(2 citation statements)

References 127 publications

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“…All VMS deposits in the area are confined to a 100 m thick stratigraphic interval within the upper part of the Hongtoushan Formation. This unit, termed the "rhythmical member" by local geologists, is primarily composed of alternating layers of biotite plagioclase gneiss and hornblende plagioclase gneiss [41].…”

Section: Regional Geologymentioning

confidence: 99%

Multi-Stage Metallogenesis and Fluid Evolution of the Hongtoushan Cu-Zn Volcanogenic Massive Sulfide Deposit, Liaoning Province, China: Constraints from Sulfur Isotopes, Trace Elements, and Fluid Inclusions

You,

Wang,

et al. 2024

Applied Sciences

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The Hongtoushan Cu-Zn volcanogenic massive sulfide (VMS) deposit, located in the Hunbei granite–greenstone terrane of the North China Craton, has undergone a complex, multi-stage metallogenic evolution. The deposit comprises three main types of massive ores: Type-1 ores, characterized by a sulfide matrix enclosing granular quartz and dark mineral aggregates; Type-2 ores, distinguished by large pyrite and pyrrhotite porphyroblasts and a small amount of gangue minerals; and Type-3 ores, mainly distributed in the contact zone between the ore body and gneiss, featuring remobilized chalcopyrite and sphalerite filling the cracks of pyrite. The metallogenic process of the Hongtoushan deposit is divided into three main stages: (1) an early mineralization stage forming Type-1 massive ores; (2) a metamorphic recrystallization stage resulting in Type-2 massive ores with distinct textural features; and (3) a late-stage mineralization event producing Type-3 massive ores enriched in Cu, Zn, and other metals. This study integrates sulfur isotope, trace elements, and fluid inclusion data to constrain the sources of ore-forming materials, fluid evolution and metallogenic processes of the deposit. Sulfur isotope analyses of sulfide samples yield δ34S values ranging from −0.7 to 4.2 (mean: 1.8 ± 1.5, 1σ), suggesting a predominant magmatic sulfur source with possible contributions from Archean seawater. Trace element analyses of pyrite grains from different ore types reveal a depletion of rare earth elements, Cu, and Zn in Type-2 massive ores due to metamorphic recrystallization, and a subsequent re-enrichment of these elements in Type-3 massive ores. Fluid inclusion studies allowed for identifying three types of ore-forming fluids: Type-1 (avg. Th: 222.9; salinity: 6.74 wt.% NaCl eqv.), Type-2 (avg. Th: 185.72; salinity: 16.56 wt.% NaCl eqv.), and Type-3 (avg. Th: 184.81; salinity: 16.22 wt.% NaCl eqv.), representing a complex evolution involving cooling, water–rock interaction and fluid mixing. This multi-disciplinary study reveals the interplay of magmatic, hydrothermal and metamorphic processes in the formation of the Hongtoushan VMS deposit, providing new insights into the fluid evolution and metallogenic mechanisms of similar deposits in ancient granite–greenstone terranes.

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Section: Regional Geologymentioning

confidence: 99%

Multi-Stage Metallogenesis and Fluid Evolution of the Hongtoushan Cu-Zn Volcanogenic Massive Sulfide Deposit, Liaoning Province, China: Constraints from Sulfur Isotopes, Trace Elements, and Fluid Inclusions

You,

Wang,

et al. 2024

Applied Sciences

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“…In most cases, iron formations are free of detritus (Bau et al 1996;Beukes et al 1990;Dymek et al 1988;Peng et al 2018), nevertheless, terrigenous contamination is not uncommon worldwide (Aoki et al 2018;Ghosh et al 2017;Gourcerol et al 2016;Hou et al 2019;Pecoits et al 2009;Sun et al 2018;Sylvestre et al 2017;Tamehe et al 2018). Even, chemically precipitated pure BIFs may co-exist with impure BIFs within the same depositional environment (Haugaard et al 2013;Viehmann et al 2015;Wang et al 2015;Barrote et al 2017;Ndime et al 2019).…”

Section: Detrital Input In Bif and Bif Hosted Rocksmentioning

confidence: 99%

Mineralogy, geochemistry and monazite U-Th-Pb geochronology of the Hakimpur banded iron formation deposit, Bangladesh: a petrogenetic study

Hasan,

Hossain,

Tsunogae

et al. 2023

Bangladesh J. Sci. Ind. Res.

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The Fe-rich deposits from Hakimpur (Bangladesh) are associated with a broad range of rock types including BIF, biotite schist, quartzite and amphibolite. Geochemical analysis coupled with petrographic studies indicates the BIF and BIF-hosted rocks were derived from sedimentary protoliths. In the sediments, clay minerals were altered at a certain thermobarometric condition during metamorphism: Clay (illite) → chlorite → biotite → amphibole, which is evident from silicification, chloritization, biotitization, saussuritization and epidotization in petrographic results. Monazite chemistry U-Th-Pb geochronological evidence indicates the deposit was affected by a single, medium-grade metamorphic event that occurred at 1728±28 Ma during the Basement rock’s magmatic event activated. The metamorphic alteration was took place by the hydrothermal action or orogenic activity due to magmatism of Palaeoproterozoic basement rock occurred surrounding the areas. The temperatures condition and oxygen fugacities obtained from zircon and coexisting magnetite and ilmenite assemblages [677–692°C and 522–809°C (at 10-23.9 to 10-11.9 fo2), respectively] are partly compatible with known crystallization conditions of the dioritic basement rock in Bangladesh. Bangladesh J. Sci. Ind. Res. 58(4), 241-264, 2023

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Geochemistry and Sm─Nd─Fe─Si isotope compositions as insights into the deposition of the late Neoarchean Qidashan banded iron formation, North China Craton

Wang,

Peng,

Tong

et al. 2024

Miner Deposita

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Element geochemistry and neodymium isotope systematics of the Neoarchean banded iron formations in the Qingyuan greenstone belt, North China Craton

Cited by 30 publications

References 127 publications

Multi-Stage Metallogenesis and Fluid Evolution of the Hongtoushan Cu-Zn Volcanogenic Massive Sulfide Deposit, Liaoning Province, China: Constraints from Sulfur Isotopes, Trace Elements, and Fluid Inclusions

Multi-Stage Metallogenesis and Fluid Evolution of the Hongtoushan Cu-Zn Volcanogenic Massive Sulfide Deposit, Liaoning Province, China: Constraints from Sulfur Isotopes, Trace Elements, and Fluid Inclusions

Mineralogy, geochemistry and monazite U-Th-Pb geochronology of the Hakimpur banded iron formation deposit, Bangladesh: a petrogenetic study

Geochemistry and Sm─Nd─Fe─Si isotope compositions as insights into the deposition of the late Neoarchean Qidashan banded iron formation, North China Craton

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