Trace elements and Sr-Nd isotopes of scheelite: Implications for the W-Cu-Mo polymetallic mineralization of the Shimensi deposit, South China

Genesis of the Nuri Cu‐W‐Mo Deposit, Tibet, China: Constraints from in situ Trace Elements and Sr Isotopic Analysis of Scheelite

“…5a) perhaps implies that Eu anomalies are not only related to the fO 2 of hydrothermal fluids but are also affected by the pH (Ghaderi et al, 1999;Brugger et al, 2000Brugger et al, , 2008. Positive Eu anomalies for Sch-A2 and Sch-A3 can be attributed to continuous water-rock interactions, leading to the oxide stage ore-forming fluid containing increasing amounts of Ca, Eu (Eu 2+ ) and Sr (Sun and Chen, 2017;Dai et al, 2022). This is consistent with the geological fact that only a small amount of molybdenite is observed in the oxide stage of the Nuri deposit.…”

“…REEs are generally incorporated into the scheelite structure by substituting for Ca 2+ , which allows scheelite to be used for determining the origin of the ore-forming fluids. This method has been employed in research on skarn tungsten (Song et al, 2014(Song et al, , 2019Sun et al, 2019), porphyry-skarn copper-tungsten (Han et al, 2020) and quartz-vein tungsten-copper (Sun and Chen, 2017) deposits. Sch-A1 scheelite from the Nuri deposit exhibits chondrite-normalized REE patterns with a rightward slope, a predominance of light REEs and depletion in heavy REEs, as well as negative Eu anomalies (Fig.…”

“…With the rapid advancement and maturation of the in situ laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) analysis technique, the trace element geochemistry of hydrothermal minerals has become a popular method for determining the composition and origin of ore-forming fluids. Scheelite (CaWO 4 ) is a significant tungsten mineral commonly found in various hydrothermal deposits, including porphyry-, skarn-, and quartz vein-deposits (Brugger et al, 2000(Brugger et al, , 2008Liu et al, 2007;Song et al, 2014;Wissink et al, 2016;Sun and Chen, 2017;Poulin et al, 2018;Zhang et al, 2018a, b;Zhao and Zhou, 2018;Nie et al, 2020;Li et al, 2021). In the process of hydrothermal mineralization, REE and Sr can replace Ca in the scheelite lattice, thus having a high content in scheelite (Brugger et al, 2000), which can be used to constrain the source of ore-forming fluids and the physical and chemical properties of the fluids (Ghaderi et al, 1999;Brugger et al, 2000;Dostal et al, 2009;Dai et al, 2019).…”

“…In the process of hydrothermal mineralization, REE and Sr can replace Ca in the scheelite lattice, thus having a high content in scheelite (Brugger et al, 2000), which can be used to constrain the source of ore-forming fluids and the physical and chemical properties of the fluids (Ghaderi et al, 1999;Brugger et al, 2000;Dostal et al, 2009;Dai et al, 2019). In addition, the Eu anomaly and Mo, Sr content in scheelite can reflect the redox properties of ore-forming fluid and the intensity of the water-rock reaction (Ghaderi et al, 1999;Sheng et al, 2015;Sun and Chen, 2017). Therefore, the composition of the rare earth elements and trace elements of scheelite can provide information about magma melt and ore-forming fluid, indicate the source of fluids and ore-forming physicochemical conditions, thus revealing the origin of ore genesis and guiding exploration (Ren et al, 2010;Song et al, 2014;Poulin et al, 2018;Han et al, 2020;Wang et al, 2021).…”

Petrogenesis and Metallogenic Implications of Neoproterozoic Granodiorite in the Super-Large Shimensi Tungsten-Copper Deposit in Northern Jiangxi, South China

“…Figure 2. NE-trending cross-section of the Shimensi deposit, showing the three tungsten ore types: Veinlets-disseminated, breccias and veins (modified after Sun and Chen [26]). Figure 2.…”