Figure 1

(a) Major tectonic units of China (modified from Ref.5). (b) Simplified map showing the distributions of the Mesozoic magmatism in SCB (modified from Ref.5). ① Qinzhou-Hangzhou belt, ② Zhenghe-Dapu fault zone. (c) Geological map of the northern Guangxi region showing the distribution of granites and mafic–ultramafic rocks with sample locations (modified from Ref.6).