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一、霍邱群的一般地质特征霍邱群分布于安徽西部霍邱、颖上地区,是一套晚太古代的含铁变质岩系(图1),经铷-锶全岩等时线法测得其同位素地质年龄为27.44±0.64亿年和27.58亿年。霍邱群自下而上分为三组:花园组、吴集组、周集组(图2,3)。花园组主要是角闪钾长眼球-变斑状混合岩,是角闪斜长片岩等岩石混合岩化的产物,厚度大于300米。吴集组分三段,下段系混合岩段,为条痕条带状混合岩及部分均质
I. General Geological Characteristics of Huoqiu Group Huoqiu Group is located in the Huoqiu and Yingshang areas in the west of Anhui Province. It is a set of late Archean iron-bearing metamorphic rocks (Figure 1). After rubidium-strontium whole-rock isochronism The isotopic geologic age was 27.44 ± 0.64 billion years and 2.788 billion years. Huo Qiu Qun from bottom to top are divided into three groups: Garden Group, Wuji group, Zhouji group (Figure 2,3). The garden group is mainly glitter potassium long-eye - variable speckle mixed rock, is the product of rock mixed rockification such as hornblende plagioclase schist, thicker than 300 meters. Wuji Formation is composed of three sections and the lower section is a mixed rock section, which is a streaked banded mixed rock and a part of homogeneous rocks