摘要
This paper reports whole-rock geochemistry and zircon geochronology of Middle Paleoproterozoic meta-gabbro from the Anshan-Gongchangling area, eastern North China Craton. Based on geochemical compositions, the meta-gabbro can be divided into two types. Type 1 is high in FeOT and low in MgO, with TREE contents and (La/Yb)N values of 107.5×10-6~114.0×1.ype 1 meta-gabbro is formed by strong recrystallization-differentiation of mafic magma staying a long period at a deep magmatic chamber, supporting a conclusion that the North China Craton was in an extensional regime during the Middle Paleoproterozoic period.