试论与埃达克岩有关的热液矿床成因类型和成矿系列——以中国北方若干矿床为例

GENETIC TYPES AND METALLOGENIC SERIES OF THE HYDROTHERMAL DEPOSITS RELATED TO ADAKITES:A Case Study of Some Deposits in Northern China

中国北方埃达克岩比较发育,有形成于早古生代岛弧环境、中生代中晚期陆弧环境及晚古生代中期和中生代中期大陆板块内环境3种埃达克岩.与形成于岛弧环境埃达克岩相关的热液矿床的成因类型为斑岩型,成矿系列为Cu-Au;与形成于陆弧环境埃达克岩相关的热液矿床的成因类型为斑岩型和浅成低温热液型,成矿系列为Au-Cu-Mo;与形成于板内环境埃达克岩相关的热液矿床的成因类型为斑岩型、夕卡岩和浅成低温热液型,成矿系列为Au-Cu-Pb-Zn.

Adakites are well developed in Northern China. Based on their forming environments, the adakites can be classified into three types, i.e. 1) those formed in Early Paleozoic island arc, 2) those formed in middle-late Mesozoic continental volcanic arc and 3) those formed in middle Late Paleozoic and middle Mesozoic mid-plate. Some well known hydrothermal deposits in the region are closely related to the adakites in accordance with their environmental types.The hydrothermal deposits related to the first type of adakite are genetically porphyry type, with a Cu-Au metallogenic series.The porphyry and epithermal types of deposits are related to the second type of adakite, in aAu-Cu-Mo metallogenic series. And the third type of adakite has a relationship with the deposits of porphyry, skarn and epithermal types, in a metallogenic series of Au-Cu-Pb-Zn.