<正>Objective There has been considerable debate about the definition of the lower boundary of Nanhua System by far.One definition is based on sedimentary seque
<正>With the global rise of industries of the new-generation information technology,energy conservation and environmental protection,biotechnology,high-end manu
<正>An important Paleoproterozoic mobile belt event took place in the North China Craton(NCC),termed the Hutuo Movement.This has been interpreted as a cratonic