A relic slice of archean–early Paleoproterozoic basement of Jiaobei Terrane identified within the Sulu UHP belt: Evidence from protolith and metamorphic ages from meta-mafic rocks, TTG–granitic gneisses, and metasedimentary rocks in the Haiyangsuo region

摘要

Graphical abstractDisplay OmittedHighlights?A relic slice of Archean-Early Paleoproterozoic basement exists in the Sulu UHP belt.?Two episodic HP granulite facies events were identified within the Haiyangsuo complex.?The Haiyangsuo complex has petrologic and chronologic affinities to the Jiaobei terrane.AbstractA great quantity of metamorphic rocks (Haiyangsuo Complex), including high-pressure (HP) mafic granulites with ‘red-eye-circle’ textures, retrogressive products of Grt-, Qtz-, Ep-, and Cpx-bearing amphibolites, TTG–granitic gneisses, and metasedimentary rocks, is distributed extensively within the Haiyangsuo region, northeastern Sulu ultrahigh-pressure (UHP) belt. The Haiyangsuo Complex crops out o