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小河口——园子街钙质矽卡岩型铜矿成矿带系由已知的袁家沟、小河口、园子街及下官坊等矿点及矿床所构成。构造位置属秦岭东西复杂构造带南亚带东段的蔡玉窑——西芦山复向斜南翼。该复向斜是由轻微区域变质的上泥盆统和下石炭统构成,褶皱轴近东西向,沿复向斜南翼的断裂带两侧的次一级裂隙中,有中酸性岩体发育,由西至东计有袁家沟、刘家坡、小河口、园子街、下官坊等地,形成与区域构造线方向一致的线状分布。岩体出露面积较
The Xiaohekou-Yuanzijie calcareous skarn-type copper ore belt is composed of the known Yuanjiagou, Xiaohekou, Yuanzi Street, Xiaguanfang and other ore deposits and deposits. It is located at the south wing of the Caiyuyao-Xilushan synclinorium in the eastern section of the south-eastern belt of the Qinling-Western complex structural belt. The synclinal is composed of the Upper Devonian and Lower Carboniferous metamorphic with slight regional metasomatism. The fold axis is nearly east-west direction. Among the secondary fissures on both sides of the fault zone of the south wing of the syncline, there are medium-acidic rock mass development From west to east, there are Yuanjiagou, Liujiapo, Xiaohekou, Yuanzi Street and Xiaguanfang, forming a linear distribution consistent with the direction of regional tectonic line. Rock outcrop area