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一、地质概况 霍邱群位于皖西四十里长山山麓,为一套含硅铁建造的变质岩系。磁异常带近南北向延展,与岩层走向一致。矿带南起重新集,经吴集、周集、越过淮河沿至颖上陶坝、汪坝等地(图1)。现控制矿带长度40余公里,宽2—7公里。整个岩带被第四系掩盖,或不整合于震旦系地层之下。目前所知,钾氩法同位素年龄多为17亿年左右,可暂定为下元古代。
First, the geological profile Huoqiu group is located in West Anhui forty miles Changshan foothills, as a set of ferroalloy metamorphic rocks. The magnetic anomaly extends nearly north-south, consistent with the strike of the rock. The ore belt re-set from the south, via Wu, Zhou Ji, across the Huaihe River Ying Ying Tao dam, Wang Dam and other places (Figure 1). Now control the ore strip length of 40 km, 2-7 km wide. The entire rock belt is covered by the Quaternary, or not integrated under the Sinian strata. As far as we know, the age of potassium and argon isotopes is mostly 1.7 billion years or so, which can tentatively be sub-Paleoproterozoic.