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Identification of the Mesoproterozoic A-type Jining granite and granite porphyry, which with abundant coeval mafic dike sills and volcanic rocks on the northern margin of the Precambrian North China Craton (NCC), may suggest intraplate extension of Columbia supercontinent. Major and trace elements of the Jining granite show an affinity to A-type granites, and may reflect an intraplate rift setting...
Haiyang granite complex consists of K-feldspar granite and syenite, with a total exposure area of ~600km2. The K-feldspar granite is metaluminous (A/CNK=0.70 to 0.99) and the syenite is slightly peraluminous (A/CNK=1.01 to 1.10), both of which have typical characteristics of A-type granite with high total alkali contents and FeOT/(FeOT+MgO) ratios. Zircon U–Pb age are 116.8±1.7Ma and 115.8±2.2Ma,...
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