Fluid-rock reactions of the Triassic Taiyangshan porphyry Cu-Mo deposit (West Qinling, China) constrained by QEMSCAN and iron isotope

Age, genesis, and geological significance of Permian–Triassic boundary volcanic tuffs in the northeastern margin of South China

“…If zircons with positive ε Hf ( t ) values are interpreted as the recycling of Neoproterozoic crustal materials, the age of the early Neoproterozoic crustal accretion activities (1220–705 Ma, especially 970–720 Ma) in the north to the western margin of the SCB (Cai et al, 2021; Liu, Yang, et al, 2015; Wang, Xu, & Santosh, 2019; Wang et al, 2021; Wu et al, 2019), which are rare in the NCB, is equivalent to the T DM2 age of zircons with positive ε Hf( t ) values, indicating that the Neoproterozoic materials on the northern SCB have involved the source magma of the Permian tuff in the Zuoshan section. Referring to middle and late Triassic magmatic records related to subduction and collision of the Mianlue Ocean in western Qinling Orogenic Belt (Gou et al, 2019; Zhang, Qiu, et al, 2021), the zircons with positive ε Hf ( t ) values, interpreted as the addition of juvenile mantle‐derived materials, occur in the syn‐collisional to post‐collisional (210–220 Ma) granites (Figure 11; Ping et al, 2013; Qin et al, 2013; Yang, Liu, et al, 2012), also supporting that the zircons with positive ε Hf ( t ) value from the Permian tuff can be used as an indicator of the beginning of the continental subduction and continent‐continent collision.…”

Timing, Provenance, and Tectonic Implications of Ore-Hosting Metasedimentary Rocks in the Giant Liba Gold Deposit, West Qinling Belt, China

“…The Mianlue Suture Zone is the boundary between the South Qinling Belt and the South China Block, which mainly comprises dismembered ophiolitic sequences, ocean-island basalts, and island arc volcanic rocks [4,28]. As the western segment of the Qinling Belt, the West Qinling Belt is contiguous to the East Qinling Belt and is bounded by the Huicheng basin or Foping dome [19,[28][29][30]. In the West Qinling Belt, the Precambrian basement is overlain by the Phanerozoic sedimentary rocks and all the strata are intruded by the Triassic granitoid (Figure 1b) [31,32].…”

“…In the West Qinling Belt, the Precambrian basement is overlain by the Phanerozoic sedimentary rocks and all the strata are intruded by the Triassic granitoid (Figure 1b) [31,32]. As the western segment of the Qinling Belt, the West Qinling Belt is contiguous to the East Qinling Belt and is bounded by the Huicheng basin or Foping dome [19,[28][29][30]. In the West Qinling Belt, the Precambrian basement is overlain by the Phanerozoic sedimentary rocks and all the strata are intruded by the Triassic granitoid (Figure 1b) [31,32].…”

Tianyu-Py pyrite: a new natural reference material for micro-beam determination of iron isotopic ratios

“…The iron isotope fractionation in low-temperature pyrite has been used to trace modern and ancient microbial metabolisms, redox evolution of the oceans and atmosphere, and iron sources and cycling in sedimentary environments. 19,22,34,35 More recently, the Fe isotopic composition of pyrite is suggested to shed light on the formation of various types of sulde ore deposits, including magmatic-hydrothermal Sn-W deposits, 36 hydrothermal Au deposits, [37][38][39] porphyry Cu (-Mo) deposits, [40][41][42][43] skarn Cu-Fe deposits, 44 epigenetic sediment-hosted Cu-Co deposits, 45 sediment-hosted stratiform sulde deposits, 46 and sulde deposits on the modern seaoor. [47][48][49] The chemical zoning of pyrite can record a wealth of information during magma evolution and metamorphic reaction (e.g., ref.…”