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冀西北金矿集中区是我国华北地台北缘金矿成矿带的重要组成部分,区内金矿主要产于水泉沟碱性杂岩体及邻近的太古宙变质岩内。Ar-Ar同位素年龄测定结果显示,金矿床成矿年龄(172～188 Ma)与水泉沟碱性杂岩体的形成年龄(304～306 Ma)相差达120 Ma。综合研究推断金矿床不是碱性岩浆直接演化产物,而是在燕山期构造—岩浆活动影响下,地下循环热流体对矿源岩——碱性杂岩体淋滤、萃取,形成富含金的成矿热液,最终在有利的成矿构造部位沉淀富集的结果。因此本区的金矿床均属于与碱性杂岩体有关的改造型热液金矿。
The Northwest Hebei Gold Concentration Area is an important part of the gold ore belt in the northern margin of the North China Platform. The gold deposits in the area mainly occur in the Shuiquanigou alkaline complex and adjacent Archean metamorphic rocks. The results of Ar-Ar isotopic dating show that the difference between the gold mineralization age (172 ~ 188 Ma) and the age of formation of the Shuishigou alkaline complex (304 ~ 306 Ma) is 120 Ma. Comprehensive study concluded that the gold deposit is not a direct evolution of alkaline magma, but under the influence of the Yanshanian tectono-magmatic activity, the underground circulating hydrothermal fluid is leached and extracted from the source rock-alkaline complex to form gold-rich The result is the result of sedimentation and enrichment in the favorable metallogenic tectonic setting. Therefore, all the gold deposits in this area belong to remodeled hydrothermal gold related to alkaline complex.