Abstract: Located in the northeastern margin of the Jiaolai Basin， the goldfield of eastern Shandong was beneath the fault zone of Guocheng of the Jingshan group metamorphic and Muniushan adamellite， and the formation of the deposits was controlled by the NEtrending faults. The study for major fault structures and orecontrolling characteristics in the mining area indicated that the sinistral shearcompression activities of Guocheng fault in the metallogenic epoches derived NEtrending secondary faults， and the NEtrending faults with opposite tendencies but same or similar trend met at the profile formed lattice orecontrolling structures which made the distribution of the deposits with the same tendency presented imbricate arrangement and that with the opposite tendency presented lattice shapes in the profile. The formation of lattice structures provided channels for the goldbearing fluid migration and orehosting spaces of the deposit mineralization and also controlled the formation and emplacement of the gold deposits.

Key words: Guocheng goldfield, Guocheng fault, lattice structures, the orecontrolling mechanism