Adakites in northeastern China and their mineralized implications
中国东北部地区埃达克岩及其成矿意义

Adakites are widely distributed in Northeast China, particularly in Jilin Province, and rarely in the east of Inner Mongolia and Helongjiang Province. The Adakites in Northeast China were formed in three tectonic settings, namely the Paleo-Asian Ocean, the Mongolia-Okhotsk Ocean and the Circum-Pacific Ocean. The time limit of the adakites is from the middle stage of Early Paleozoic to Mesozoic. The adakite-hosted hydrothermal deposits in the area are mainly Au and Cu, secondly Mo. The genetic types are porphyry and magmatic hytrothermal and epithermal fluids. The mineralizated epochs are the middle stage of Early Paleozoic, the late stage of Late Paleozoic and the middle and late stages of Mesozoic. Based on the characteristics of the adakites and the related hytrothermal deposits, as well as the tectonic settings, the minerogenetic provinces fall into three regions, namely the north of Da Hinggan Moutain, Meng-Ji-Hei and eastern Ji-Hei.