Chengdao oil field has a crystalline basement of Achaean granite gneiss and a sedimentary basement of Paleozonic carbonate rock or Mesozonic clastic rock.
埕岛油田的结晶基底为太古界花岗片麻巖,沉积基底为古生界碳酸盐巖和中生界碎屑巖。
The faults related to the gold deposits in the area often follow the contact between granites and metamorphic rocks of the Achaean Jiaodong Group.
本区内的金矿断裂构造即花岗巖与太古代胶东群变质巖呈构造接触带。
The Xigudui Formation of Achaean Wuhe Group-Complex is the favorable gold ore-forming wall rock and mineral source.
太古界五河巖群西崮堆组是金矿有利的成矿围巖和矿源层。