“…Paleoproterozoic rock units in the Yangtze Block are tentatively incorporated within Nuna (e.g., Cawood et al, 2020, 2018; Furlanetto et al, 2016; Han et al, 2017; Wang et al, 2016; Yin et al, 2013; Zhao et al, 2004), but the absence of precise paleomagnetic data has resulted in a number of contrasting and, in some cases, mutually exclusive models (e.g., Cawood et al, 2018; Chen et al, 2013; Furlanetto et al, 2016; Wang et al, 2014, 2016; Zhao, Zhou, & Zheng, 2010; Zhao, Zhou, Li, et al, 2010; Zhou et al, 2014). Voluminous late Paleoproterozoic to early Mesoproterozoic mafic igneous rocks, which were deemed to be produced in an intracontinental rift environment, are exposed in the southwestern Yangtze Block and correspond to the early breakup (or attempted breakup) of the Nuna supercontinent (e.g., Chen et al, 2013; Liu et al, 2019; Lu et al, 2019; Zhao, Zhou, & Zheng, 2010; Zhao, Zhou, Li, et al, 2010). However, the geodynamic driving force for this magmatism is poorly constrained.…”