Enrichment of Mississippi Valley-type (MVT) deposits in the Tethyan domain linked to organic matter-rich sediments

Song, Yucai; Yang, Zhiming; Zhuang, Liangliang

doi:10.1007/s11430-023-1195-5

Cited by 3 publications

(1 citation statement)

References 94 publications

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“…The Himalayan-Tibetan and Zagros mountain ranges, as the youngest and most extensive continental-collision orogens in the Tethyan domain, host several major sediment-hosted Pb-Zn deposits, including the world-class Jinding, Huoshaoyun, Mehdiabad, and Angouran deposits (Fig. 1; Reynolds & Large, 2010;Rajabi et al 2012Rajabi et al , 2015Hou & Zhang, 2015;Song et al 2017). Many of these deposits were only recently discovered and are poorly documented, especially in Iran.…”

Section: Introductionmentioning

confidence: 99%

Geology, fluid inclusions and C−O−S−Pb isotopic compositions of the Chahmileh Pb-Zn deposit, Central Iran: Implications for ore genesis

Mehrabi,

Chaghaneh,

Tale Fazel

et al. 2023

Geol. Mag.

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The Chahmileh Pb–Zn deposit, located northwest of the Central Iran Zone, is a sediment-hosted Pb–Zn deposit in the ‘Yazd-Anarak Metallogenic Belt’. It is hosted in Middle Triassic carbonate rocks and is mainly controlled by NW-trending faults. The main ore minerals are galena and sphalerite with minor chalcopyrite, pyrite, and quartz, dolomite, along with minor calcite and baryte as gangue minerals. Cerussite, hemimorphite, wulfenite, mimetite, smithsonite, malachite and iron oxy-hydroxides are the main non-sulphide ore minerals. The main styles of mineralization are vein-veinlet, breccia, disseminated and replacement in association with silicification and dolomitization. Microthermometry of fluid inclusions in dolomite and quartz indicates that the ore precipitated from a warm to hot basin-derived saline fluid. Dolomite samples have δ13CVPDB and δ18OVSMOW values of −0.99 to +1.99‰ and +20.74 to +25.48‰, respectively, and are plotted in the marine carbonate rocks field. These isotopic values suggest that CO2 in the hydrothermal fluids mainly originated from marine carbonate rock. The δ34S values range from +6.3 to +8.2‰ for galena, +5.9 to +6.2‰ for sphalerite, +1.4 to +3.4‰ for chalcopyrite and +15.0 to +17.4‰ for bayite are compatible with a predominant thermochemical sulphate reduction process, and with sulphur sourced from Triassic seawater. Galena samples have a homogeneous Pb isotopic composition that is indicative of a continental crustal reservoir as the main source of lead and probably for the other ore metals. Based on geology, mineralogy, texture and fluid characteristics, the Chahmileh deposit is classified as a carbonate-hosted Mississippi Valley-type deposit.

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Section: Introductionmentioning

confidence: 99%

Geology, fluid inclusions and C−O−S−Pb isotopic compositions of the Chahmileh Pb-Zn deposit, Central Iran: Implications for ore genesis

Mehrabi,

Chaghaneh,

Tale Fazel

et al. 2023

Geol. Mag.

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New advances in the study of Tethyan Geodynamic System

Ding

2024

Sci. China Earth Sci.

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Calcite U-Pb geochronology of Huayuan carbonate-hosted Zn-Pb mineralization in Central Yangtze Craton, South China

Li,

Zhang,

Zhao

et al. 2024

Preprint

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The Yangtze Craton hosts significant Zn-Pb deposits in Neoproterozoic to Carboniferous carbonates (> 60 Mt Pb + Zn metals), accounting for 30% of China's Zn-Pb resources. However, determining the timing of zinc and lead mineralization in these reservoirs is challenging. This study employs LA-ICP-MS U-Pb geochronology on calcites to date Zn-Pb deposits hosted in Lower Cambrian limestone in the Huayuan orefield. Three generations of calcite formation were dated: the first recorded the pre-ore deposition of Lower Cambrian limestone at 517 ± 10 Ma, the second marked a hydrothermal event linked to stratiform sphalerite ore formation at 501.4 ± 8.4 Ma, and the third was associated with discordant breccia-hosted Zn-Pb mineralization at 397.5 ± 9.6 Ma. Our results indicate that Paleozoic carbonate-hosted Pb-Zn mineralization in the Yangtze Craton is linked to (1) the final assembly of Gondwana in the late Cambrian-early Ordovician (520 − 480 Ma); and (2) the intracontinental orogeny response to Jiangnan Uplift (420 − 400 Ma). This study highlights the spatial-temporal relationship between low temperature carbonate-hosted mineralization and orogenic events that are consistent with classic Mississippi Valley-type models worldwide. Furthermore, it demonstrates the potential of in situ U-Pb calcite geochronology to date ore deposits lacking syn-ore minerals suitable for traditional dating methods.

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Enrichment of Mississippi Valley-type (MVT) deposits in the Tethyan domain linked to organic matter-rich sediments

Cited by 3 publications

References 94 publications

Geology, fluid inclusions and C−O−S−Pb isotopic compositions of the Chahmileh Pb-Zn deposit, Central Iran: Implications for ore genesis

Geology, fluid inclusions and C−O−S−Pb isotopic compositions of the Chahmileh Pb-Zn deposit, Central Iran: Implications for ore genesis

New advances in the study of Tethyan Geodynamic System

Calcite U-Pb geochronology of Huayuan carbonate-hosted Zn-Pb mineralization in Central Yangtze Craton, South China

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