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ites sampled across major NNE–trending faults in eastern Guangdong Province record conspicuous compositional variations in the crustal basement. Two principal crustal domains can be distinguished: Paleoproterozoic-dominated in the northwest and Mesoproterozoicdominated in the southeast. Within the Mesoproterozoic-dominated domains, thin tectonic slivers of isotopically homogeneous Paleoproterozoic crust are interspersed with narrow belts displaying mantle–derived characteristics. Combined with other published data, the Nd-Sr isotopic signatures from eastern Guangdong show that the Precambrian basement in southeastern China is largely heterogeneous and made up of a series of narrow, crustal slices. The major domain boundaries coincide with large-scale NNE-trending strikeslip faults in the cover sequences. We postulate that these boundaries developed in the crust during the Mesoproterozoic and largely controlled the geological development of SE China throughout the Phanerozoic.

Isotope zonation in basement crustal blocks of southeastern China: Evidence for multiple terrane amalgamation