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蓬家夼金矿床是胶东地区新近发现的金矿床之一 ,矿体赋存在胶莱盆地东北缘拆离断层带中 ,为区内燕山期火山活动前期 ,大气水和岩浆水的参与下形成的层控蚀变构造角砾岩型金矿床。同位素研究表明 ,蓬家夼金矿的硫、碳来源于矿区围岩 ;部分铅则可能具有地幔成因。成矿流体δ1 8OH2 O为 0 .5 9× 10 - 3 ～ 4.0 3× 10 - 3 ,δDH2 O为 - 89.5× 10 - 3 ～- 97.9× 10 - 3 ,反映了成矿流体由大气水和岩浆水混合组成的特点。成矿时代在 90 Ma～12 0 Ma之间。
The Pengjiaju gold deposit is one of the newly discovered gold deposits in the Jiaodong area. The ore body is found in the detachment fault belt in the northeastern margin of the Jiaolai Basin. It is formed during the early Yanshanian volcanic period, with the participation of the atmospheric water and magmatic water Stratigraphic alteration tectonic breccia type gold deposit. Isotope studies show that the sulfur and carbon in the Pengjiajing gold deposit are derived from the surrounding rock of the mine area; some lead may have the origin of the mantle. The δ18OH2O of the ore-forming fluids is 0.59 × 10-3 ~ 4.0 3 × 10-3, and the δDH2O ranges from -89.5 × 10-3 to -97.9 × 10-3, reflecting that the ore-forming fluid is composed of both atmospheric water and magma Water mix features. The mineralization age ranged from 90 Ma to 120 Ma.