DECRATONIC GOLD DEPOSITS IN THE JIAODONG PENINSULA, EASTERN NORTH CHINA CRATON
The world-class gold camps and deposits in the Jiaodong Peninsula, eastern North China Craton (NCC), show obviously different features from the typical orogenic gold deposits. Their diversities reflect complex interplay of physical and chemical processes at a depositional trap. Gold deposition in the Jiaodong Peninsula took place during a short period, and formed in the same tectonic-geological setting with the same type of ore fluids. This huge gold mineralization event coincided with tectonic reactivation or craton destruction of the North China Craton, as marked by asthenosphere upwelling, voluminous igneous rocks, and high crustal heat flow, which may have provided sufficient heat energy and fluid input required for the formation of the gold deposits. A genetic relation has been established between the formation of Au deposits and decratonic magmatic and hydrothermal activities, and a new model for “Decratonic Gold Deposits” has been proposed.