| 吉林夹皮沟金矿床含金石英的40Ar/39Ar快中子活化年龄测定 |
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| 引用本文： | 吴尚全.吉林夹皮沟金矿床含金石英的40Ar/39Ar快中子活化年龄测定[J].矿床地质,1991,10(4):349-358. |
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| 作者姓名： | 吴尚全 |
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| 作者单位： | 吉林有色矿产地质研究所 |
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| 摘 要： | 该文对夹皮沟金矿区有代表性的两个矿床及一个矿点的含金石英脉，用快中子活化法测定了40Ar/39Ar年龄。其年龄谱都以马鞍形为特征，年龄谱的最低坪年龄可作为石英脉的生成时代。3个数据分别为(1824±24)Ma、(1253±17)Ma和(203±60)Ma。由此认为夹皮沟矿区，金的成矿作用是多阶段的，吕梁期、晋宁期和燕山早期。而金矿的成因主要与吕梁期和晋宁期的变质作用有关，因此夹皮沟金矿可划为变质热液型金矿床。
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| 关 键 词： | 含金 石英脉 快中子 活化 金矿 |
40Ar/39Ar Fast Neutron Activation Age Determination Of Auriferous Quartz From The Jiapigou Gold Deposit, Jilin Province |
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| Abstract: | Age determination using 40Ar/39Ar spectral method was made for three quartz samples collected from the Bajiazi gold deposit in the principal alteration zone and the Erdaogou gold deposit and the No.816 ore occurrence in the NW-trending arc structural zone. The ages determined are 1824 Ma, 1253 Ma and 203 Ma respectively. These data suggest that gold mineralization in the Jiapigou ore district is a polystage one with Luliang period and Jinning period playing the dominant role. After Hercynian orogeny, the original gold was partly mobilized, which however only led to small-scale economic enrichment. Based on the emplaeement time of quartz veins, the author holds that the Jiapigou gold deposit is genetically of metamorphic hydrothermal type. |
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