福建政和晚侏罗世——早白垩世金矿床成因类型浅析
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摘要
政和地区大地构造位于闽东火山断拗带与闽西北隆起带之间,形成了受构造控制的一系列金矿床。这些金矿床常赋存于中酸性岩体中,硫、氢氧同位素显示有大气降水的岩浆热液成因,成矿深度约2km。围岩蚀变及包裹体温度均指示为中低温,结合大地构造背景,可知晚侏罗-早白垩世金矿属浅成低温热液成因类型矿床。浅成低温热液矿床易被剥蚀,且常与斑岩矿床成体系共生,因此,政和地区上侏罗～下白垩统中酸性岩、斑岩区可能有较好成矿远景。
Tctonic of Zhenghe Fujian is located in the uplift zonebetween the northwestern Fujian and Fujian volcanic belt off the bend, because of Late Jurassic-Early Cretaceous volcanic magma experienced a strong role, there formed by a series of structurally controlled gold deposits. These gold deposits often occur in acidic rock, sulfur, hydrogen and oxygen isotopes showed a meteoric magmatic hydrothermal mineralization depth of about 2 km. Wall rock alteration types and inclusions are indicated as the low temperature,Combined with tectonic setting, we can see the Late Jurassic-Early Cretaceous epithermal gold belongs to the type of deposit genesis low. Epithermal deposit is easily eroded and often symbiotic with porphyry deposits into the system, so the governance area Jurassic-Lower Cretaceous acidic rocks, porphyry mineralization zone may have better prospects.
Tctonic of Zhenghe Fujian is located in the uplift zonebetween the northwestern Fujian and Fujian volcanic belt off the bend, because of Late Jurassic-Early Cretaceous volcanic magma experienced a strong role, there formed by a series of structurally controlled gold deposits. These gold deposits often occur in acidic rock, sulfur, hydrogen and oxygen isotopes showed a meteoric magmatic hydrothermal mineralization depth of about 2 km. Wall rock alteration types and inclusions are indicated as the low temperature,Combined with tectonic setting, we can see the Late Jurassic-Early Cretaceous epithermal gold belongs to the type of deposit genesis low. Epithermal deposit is easily eroded and often symbiotic with porphyry deposits into the system, so the governance area Jurassic-Lower Cretaceous acidic rocks, porphyry mineralization zone may have better prospects.
引文
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[4]方如健.2007.福建政和星溪金矿床构造控矿特征及找矿前景[J].福建地质,01:20-26.
[5]刘乃忠.2017.福建政和马仑头金矿床地质特征及成因分析[J].福建地质,04:180-184.
[6]朱群.2004.古利库式冰长石—绢云母型金(银)矿床成矿模式与找矿方向[M].东北大学.
[7]翁朝峰.1998.福建省金矿成矿地质条件与成矿远景.福建地质.01:24-34.
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[10]李国军.2007.浅层低温热液型金矿探析.地球科学,07:03-15.