Geochronology, geochemistry and zircon Hf-O isotopic composition of ore-bearing volcanic rocks at Dapingzhang VMS Cu-Zn deposit, SW China: Petrogenetic, metallogenic and tectonic implications

Geochronology and geochemistry of the Manxin ophiolitic mélange in the Changning‐Menglian Suture Zone, southwest China: Implications for the tectonic evolution of the Proto‐Tethys Ocean

“…The gradual disintegration of the Rodinia supercontinent gradually formed the Laurasia, Gondwana and Pan‐Cathaysia continents in coexisting distribution, as well as the Palaeo‐Atlantic, Palaeo‐Asian and Tethys Oceans between them, it mainly manifests as a metamorphic basement formed by convergent orogeny nearly a billion years ago (Pan et al, 2012; Wang, Lü, Cao, et al, 2021). The Neoproterozoic Qingbaikou Epoch is a clastic carbonate formation containing a large number of algal stromatolites and micropalaeoplant fossils.…”

“…The Dawazi 417–429 Ma bimodal volcanic rocks developed in Dazhonghe, east of the Changning‐Menglian Suture Zone (Liu et al, 2018; Mao et al, 2012). Moreover, the 430–413 Ma bimodal volcanic rocks (Wang, Qian, Cawood, et al, 2021) and 429 Ma volcanic rocks (Lehmann et al, 2013) in Dapingzhang, east of Dazhonghe, formed in a back‐arc basin through the Proto‐Tethyan Ocean eastern subduction (Figure 1b). Thus, the Proto‐Tethyan Ocean eastern subduction in the late Early Palaeozoic restricted the Silurian Sanjiang arc‐basin system tectonic pattern and opened the prelude to Late Palaeozoic Sanjiang multi‐island arc basin system formation and evolution (Figure 13d).…”

“…The southwest Sanjiang region is located in the southeast of Tibet, China, an important region for studying the evolution of the Tethys Ocean. The region mainly comprises the Simao Block and the Baoshan Block, separated by the Changning‐Menglian Suture Zone (Figure 1a,b, Stampfli and Borel, 2002; Wang, Wang et al, 2013; Metcalfe, 2013; Wang, Lü, Cao, et al, 2021; Pan et al, 2012, 2020). The Changning‐Menglian Suture Zone runs from Tongchangjie to Yunxian in the north via Shuangjiang and Lancang to Menglian in the south and into Myanmar (Wang, Lü, Cao, et al, 2021).…”

“…The region mainly comprises the Simao Block and the Baoshan Block, separated by the Changning‐Menglian Suture Zone (Figure 1a,b, Stampfli and Borel, 2002; Wang, Wang et al, 2013; Metcalfe, 2013; Wang, Lü, Cao, et al, 2021; Pan et al, 2012, 2020). The Changning‐Menglian Suture Zone runs from Tongchangjie to Yunxian in the north via Shuangjiang and Lancang to Menglian in the south and into Myanmar (Wang, Lü, Cao, et al, 2021). There are relatively few complete ophiolite mélanges in the Suture Zone, long considered the location of the Palaeo‐Tethys Ocean, which opened during the Devonian and closed at least during the Late Triassic.…”

“…The southwest Sanjiang region is located in the southeast of Tibet, China, an important region for studying the evolution of the Tethys Ocean. The region mainly comprises the Simao Block and the Baoshan Block, separated by the Changning-Menglian Suture Zone (Figure 1a, b, Stampfli and Borel, 2002;Metcalfe, 2013;Wang, Lü, Cao, et al, 2021;Pan et al, 2012Pan et al, , 2020.…”