Geochemical evidence for a multi-source origin of manganese in the Montaña de Manganeso deposit, central Mexico

Madondo, Joseph; Canet, Carles; Gonzáléz-Partida, Eduardo; Núñez‐Useche, Fernando; Rodríguez-Díaz, Augusto Antonio; Rajabi, Abdorrahman; Colás, Vanessa; Blignaut, Lauren; Vafeas, Nicholas

doi:10.1016/j.chemer.2021.125789

Cited by 2 publications

(1 citation statement)

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“…Various geochemical indicator ratios in most iron-manganese ores from the LKR such as (Mn + Fe)/Ti , Ba/Ti (>0.15), Y/Ho (21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35), (Y/Y*) N (>1), (Eu/Eu*) N (>1), along with relatively low total REE + Y (<100 ppm) and Th (0.46-7.93 ppm), are compatible with the hydrothermal origin of iron and manganese minerals in the LKR. In particular, the positive Eu anomaly and the lack of a negative Ce anomaly in the majority of ore samples from the LKR deposits argue against any substantial role of seawater precipitation in the formation of Fe-Mn oxides and hydroxides [112][113][114][115][116]. However, in individual samples from the Poperechny deposit, some of these indicator parameters are compatible with the hydrogenic Fe-Mn mineral formation [117][118][119] suggesting that, at least locally in the LKR, a limited hydrogenic (seawater) component was also involved in the ore formation process [68].…”

Section: Discussionmentioning

confidence: 99%

Magmatic–Hydrothermal Origin of Fe-Mn Deposits in the Lesser Khingan Range (Russian Far East): Petrographic, Mineralogical and Geochemical Evidence

Berdnikov,

Kepezhinskas,

Nevstruev

et al. 2023

Minerals

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Iron and iron–manganese deposits form three closely spaced clusters within the Lesser Khingan Range of the Russian Far East. Fe-Mn mineralization is hosted in Vendian–Cambrian carbonates and composed of magnetite, hematite, braunite, haussmanite, rhodochrosite and pyrolusite. The iron–manganese ores are closely associated with explosive intermediate–felsic breccias, magnetite-rich lavas, dolerites and mineralized lithocrystalloclastic tuffs. Magmatic rocks display both concordant and discordant relationships with Fe-Mn mineralization and contain abundant xenoliths of host carbonates. Both magmatic rocks (with the exception of Nb-enriched dolerites) and Fe-Mn ores are characterized by variable enrichments in large-ion lithophile and light rare earth elements and strong depletions in high-field strength elements compatible with the broad subduction setting for explosive volcanism and associated hydrothermal Fe-Mn ore mineralization. Nd-Sr isotope systematics suggest contamination by both ancient and juvenile continental crust and the involvement of recycled pelagic sediment in the formation of Fe-Mn deposits in the Lesser Khingan Range of the Russian Far East.

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