U–Pb zircon, geochemical and Sr–Nd–Hf isotopic constraints on age and origin of the intrusions from Wunugetushan porphyry deposit, Northeast China: implication for Triassic–Jurassic Cu–Mo mineralization in Mongolia–Erguna metallogenic belt

Southward subduction of the Mongolia–Okhostk Ocean: Insights from Early–Middle Triassic intrusive rocks from the Jiawula–Tsagenbulagen area in NE China

“…Without additional heat input from the mantle, the thermal budget provided by radioactive decay and crustal thickening would be insufficient to trigger partial melting of the juvenile basic lower crust or subalkaline meta‐basalts. These geochemical features are also shared by the Permian granitoids at Jiawula (Niu et al, ) and the Early to Late Triassic granitoids at the Badaguan deposit (Gao et al, ; Mi et al, , ), Shanghulin area (Tang et al, ), and Taipingchuan deposit (Chen et al, ), suggesting that the Late Permian to Late Triassic southern Erguna Massif was most likely situated in an Andean‐type arc setting.…”

“…Magmatism in the Late Permian–Middle Triassic has been identified and occurs along the northern Erguna Massif. This suite includes diorite, quartz diorite, granodiorite, monzogranite, syenogranite, and granite‐prophyry (Kang et al, ; Mi et al, , ; Tang et al, ; Tian, Li, Wang, & Liu, ). Magmatic activity of this age has also been identified in the Erdenet quartz‐diorite, Tumuritin Ovoo granite, Hangayn, Shar Us Gol, and Egiyn Davaa complexes in Central Mongolia (Budnikov et al, ; Jahn, Windley, Natal'in, & Dobretsov, ; Orolmaa et al, ; Takahashi, Arakawa, Oyungerel, & Naito, ; Jiang, Nie, Su, Bai, & Liu, ; Jiang, Nie, Su, Cai, & Ding, ).…”

“…During the Late Triassic–Early Jurassic, magmatic activity was extensive in the Erguna Massif and included the emplacement of granodioritic porphyry (230 Ma) in the Badaguan Cu–Mo deposit (Kang et al, ; Mi et al, ), monzogranite (206 Ma) in the Aluga area (Wu et al, ), granodiorite porphyry (202 Ma) in the Taipingchuan Cu–Mo deposit (Zhang et al, ), and monzogranite (194 Ma), monzogranitic porphyry (191 Ma), rhyolitic porphyry (180 Ma), and andesitic porphyry (172 Ma) in the Wunugetuanshan Cu–Mo deposit (Mi et al, ).…”

“…130 Ma). The Neoproterozoic and Early Palaeozoic granitoids are scattered within the widespread Triassic–Jurassic plutons that range in age from 247 to 182 Ma (Meng et al, ; Mi et al, ; Tang et al, , ; Wu et al, ). Additionally, the Triassic–Jurassic and the Early Cretaceous magmatism has a close relationship with Cu–Mo–Pb–Zn–Ag mineralization in the Erguna Massif (Chen et al, ; Dai, Yan, Liu, Deng, et al, ; Mi et al, , ; Zhang et al, ).…”

“…For example, Tang et al () reported that the Early–Middle Triassic granitoid from the Moerdaoga–Shanghulin area (Figure a) and comprised a suite of high‐K calc‐alkaline diorites, quartz diorites, granodiorites, monzogranites, and syenogranites, and include affinities for granitoids from the active continental margin settings. Zhang, Yang, He, Wu, and Wu () and Mi et al (, ) showed that a series of porphyry copper deposits formed in the Wunugetushan–Taipingchuan area during the Late Triassic to Early Jurassic, and this event was associated with the subduction of the ocean slab under the Erguna Block. Previous studies delineated a possible Early Mesozoic arc‐trench system in the northern Erguna Massif.…”