Zircon geochronology and Hf isotopes of Mesozoic intrusive rocks from the Yidun terrane, Eastern Tibetan Plateau: Petrogenesis and their bearings with Cu mineralization

Temporal and spatial patterns of sediment routing across the southeast margin of the Tibetan Plateau: Insights from detrital zircon

“…References for bedrock (Figure f) data can be found for Qinling‐Dabieshan [ Hacker et al ., ; Clift et al ., ], Lhasa Terrane [ Chu et al ., ; Clift et al ., ; Leier et al ., ; Gehrels et al ., ], Jomda‐Weixi arc [ Yang et al ., ], Laji Shan [ Lease et al ., ], Lanping Simao Basin [ L. Wang et al ., ], Amdo basement [ Guynn et al ., ; Zhang et al ., ], Gaoligong batholith [ Xu et al ., ], Tengliang and E. Yinjiang [ Xu et al ., ], Chizhou bedrock [ Song et al ., ], Yidun arc [ X.‐S. Wang et al ., ], Mengyejing formation [ Wang et al ., ], Tengchong Block [ Qi et al ., ], Jiaojiguanliangzi formation [ Cao et al ., ], Jurassic SS Sichuan Basin [ Luo et al ., ], Jurassic SS Yunnan [ Su et al ., ], Qamdo Basin [ Fei and Weislogel , ], Yidun Terrane [ Reid et al ., ; Wang et al ., ; Peng et al ., ], Loei [ Burrett et al ., ], Indochina [ Burrett et al ., ], Qiangtang Terrane [ Gehrels et al ., ], Triassic Sichuan Basin [ She et al ., ], NE Vietnam [ Burrett et al ., ], Zheduo‐Gonggar massif [ D. Li et al ., ], Yangtze Block [ Su et al ., ], Khorat Plateau [ Carter and Moss , ; Carter et al ., ; Nagy et al ., ; Carter and Bristow , ; Clift et al ., ], Qiangtang volcanics [ Zhai et al ., ; Peng et al ., ], Lincang [ Hennig et al ., ; Dong et al ., ], Kontum [ Nagy et al ., ; Clift et al ., ], Emeishan [ Shellnutt , ], Youjiang Basin [ Yang et al ., ], Sukhothai [ Burrett et al ., ], Songpan Ganze complex [ Weislogel et al ., ], Yangtze Craton [ Li , ; Zhang et al ., , ; Zheng et al ., ; Gao et al ., ], Ailao Shan [ Leloup et al ., , ;...…”

“…Late Triassic zircon ages are found in multiple regions throughout the study area and are related to postcollision magmatism following the closure of the Paleo‐Tethyan Ocean (Figure ) [ Dong et al ., ; Peng et al ., , ]. There are several potential sources for zircon of this age (see Figure f), including the arc volcanics of the eastern Yidun arc (YA) [ Reid et al ., ; Peng et al ., ], Lincang granitic intrusions (LG) [ Dong et al ., ], and Qiangtang Block volcanics (QV) [ Peng et al ., ]. Recycling of Mesozoic strata is another potential source of Late Triassic zircon.…”

Detrital zircon provenance comparison between the Paleocene-Eocene Nangqian-Xialaxiu and Gongjue basins: New insights for Cenozoic paleogeographic evolution of the eastern Tibetan Plateau

“…Sandstone detrital modes and detrital zircon U-Pb geochronology are extremely powerful tools to constrain the provenance of terrigenous sediments, the evolution of sedimentary basins, and the tectonic affinity of the different blocks involved (e.g., Dickinson and Suczek, 1979;Dickinson et al, 1983;Gehrels et al, 2003;Weislogel et al, 2006Weislogel et al, , 2010Enkelmann et al, 2007;Dong et al, 2011;Zhu et al, 2011a;Dai et al, 2012;Fan et al, 2015;Li et al, 2015a;Wang et al, 2017). Nevertheless, these tools have not been applied for regional provenance analyses of the Paleogene Nangqian-Xialaxiu and Gongjue basins, although potential source areas are suggested to be the Songpan-Ganzi Terrane to the north (e.g., Bruguier et al, 1997;Ding et al, 2013;Zhang et al, 2014), or the Yidun Block to the southeast (e.g., Wang et al, 2013;Peng et al, 2014;Wu et al, 2016). Therefore, the aim of this paper is to determine the potential source areas of these sediments preserved in the Paleocene-Eocene Nangqian-Xialaxiu Basin and the Gongjue Basin in the eastern Qiangtang Terrane by examining their petrographic characteristics and detrital zircon U-Pb age distributions.…”

Zircon U–Pb ages, Hf isotope data, and tectonic implications of Early–Middle Triassic granitoids in the Ailaoshan high-grade metamorphic belt of Southeast Tibet

“…Conversely, the eastern Yidun Arc is composed almost exclusively of Middle-Late Triassic clastic strata and arc-related volcanic and plutonic rocks. However, two peaks in zircon Hf model ages led Peng et al (2014) to suggest two major episodes of Mesoproterozoic juvenile continental crust development beneath the eastern Yidun arc, which is similarly interpreted for the Yangtze block. Therefore, the basements of the Zhongzan block and the eastern Yidun arc share the same evolutionary history as the Yangtze block during the Mesoproterozoic (Reid et al 2007;Leng et al 2014;Peng et al 2014).…”

“…292 Ma; Yan et al 2005) was broadly coeval with the opening of the Jinping-Song Da rift during the early Permian (Hanski et al 2004). Based on the consistent Late Triassic timing of rifting and suturing (Liu et al 2012a, b;He et al 2013;Wang et al 2013b;Peng et al 2014), the Ganzi-Litang Ocean may be a northwestward extension of the Jinping-Song Da rift (Liu et al 2012b). Therefore, based on these spatial-temporal relationships, it is reasonable to argue for the existence of an Ailaoshan rift that was both located between, and connected to the Ganzi-Litang Ocean to the northwest and the JinpingSong Da rift to the southeast.…”