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1 Introduction After the Dongchuan Orogenic movement(Hudsonian Orogeny,ca.1800 Ma±),the tectonic basement layer of the continental crust on the Yangtze massif could have been formed.And then tectonic-magmatic emplacement
1 Introduction After the Dongchuan Orogenic movement (Hudsonian Orogeny, ca. 1800 Ma ±), the tectonic basement layer of the continental crust on the Yangtze massif could have been formed. And then the tectonic-magmatic emplacement