Figure 4: (a) Burial history curves of the Cambrian and Ordovician strata from well TS1 in the North Uplift (modified from Zhu et al., 2015). Dashed rectangle denotes the periods of Early Permian hydrothermal activity, based on data from [5, 26, 27]. (b) Paragenetic sequence of the main diagenetic events of Cambrian strata in the studied well. Dashed lines indicate uncertain timing or a long-term event.