摘要
该矿区位于华北地台北缘,是一个产于变质岩中的火山热液型多金属矿床。锌和伴生金、银、砷、镉均达大型规模,铅、硫等矿也达中型规模以上。矿体呈不规则的脉状产出,多成群出现,彼此平行,矿体较为集中。矿石主要有绿泥石一闪锌矿型及绢云母-多金属型两类。前者富锌,易选,局部含金较高;后者富铅和银,较难选,含砷较高。矿床的主要控矿条件是:①矿体产于多次活动的断裂构造带之中;②矿化作用主要与燕山期中酸性次火山岩(石英斑岩)有关,次火山岩密集分布区矿化甚佳;③太古界红旗营子群的角闪斜长变粒岩中锌、铅、金、银的丰度很高,为潜在矿源层;④以黄铁绢英岩为主的围岩蚀变甚为发育。
Located on the northern margin of the North China platform, the ore deposit is a volcanogene hydrothermal polymetallic one occurring in metamor- phic rocks. Zinc ore and associated gold, silver, arsenic and cadmium ores are all large in size, and lead and sulfur ores also reach medium size.Assuming irregular veinlike form, o(?)ebodies are concentrated in groups and parallel to each other. Ores include mainly chlorite-sphalerite type and sericite-polymetallic type, with the former being rich in zinc, easy to dress and locally higher in gold, and the latter rich in silver, rather difficult to dress and fairly high in arsenic.Only insufficient geological work has been done in this area, and there are ore prospects in the ore district and its outskirts. The major ore-controlling conditions for the ore deposit are as follows: ①orebodies are present in and strictly controlled by the structural zone which has experienced repeated activities; ②mineralization is related mainly to Yanshanian intermediate-acid subvolcanic rocks (quartz porphyry), and the densely-concentrated areas of subvolcanic rocks are in company with excellent mineralization; ③Pb, Zn, Au and Ag are of great abundance in hornblende-plagioclase leptynite of Archeozoic Hongqiyingzi Group which seems to be a potential source bed; and ④alterations, mainly beresitization, are well developed.
出处
《矿床地质》
CAS
CSCD
北大核心
1990年第4期301-308,共8页
Mineral Deposits
