| 广西古袍金矿区花岗斑岩侵入期后多期热液成矿作用的Ar-Ar年龄证据 |
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| 引用本文：朱桂田,徐文忻,李蘅,朱文风.2005.广西古袍金矿区花岗斑岩侵入期后多期热液成矿作用的Ar-Ar年龄证据[J].地球学报,26(z1):156-159. |
| DOI：10.3975/cagsb.2005.s1.51 |
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| 基金项目:广西自然科学基金项目“桂东南火山期后构造-热液作用与金矿成矿作用研究”（编号：桂科回 0342025）资助 |
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| 中文摘要:古袍矿区的花岗斑岩出露于古袍复向斜西部扬起部位。围岩地层主要为寒武系水口群浅变质砂岩、粉砂岩、硅质岩及板岩、千脉岩和破质页岩。花岗斑岩和花岗斑岩内的石英脉体中石英样品的40Ar/39Ar年龄数据表明户，40Ar/39Ar坪年龄值在187.87±1.53 Ma至244.88±2.48 Ma之间，是加里东期花岗斑岩成岩作用之后，海西、印支或者燕山早期多期构造热液作用的产物。金矿化与花岗斑岩成岩后的多期次构造热液作用有关。主要受控于断层破碎带及其中充填的石英脉和黄铁矿化。 |
| 中文关键词:金矿 花岗斑岩 多期热液作用 同位索 古袍 |
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| Isotopic Evidence for Multi-stage Ore-forming Processes after the Intrusion of Granite Prophyry in the Gupao Gold Ore District,Guangxi |
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| Abstract:Granite porphyry stocks in the Gupao gold ore district are located in the west of Gupao synclinorium. The country rocks are mainly a suite of slightly metamorphosed sandstone, siltstone, siliceous rock, slate, phyllite and carbonaceous shale in Cambrian Shuikou Group. 40Ar/39Ar data of quartz from the granite porphyry and from the quartz veins in the granite porphyry range from 187.87±1.53Ma to 244.88±2.48 Ma, indicating products of structural hydrothermal fluids of Late Hercynian, Indosinian or Early Yanshanian perods. Gold mineralization is related to the activity of the multi-stage structural hydrothermal fluids after the intrusion of the granite porphyry, and controlled by the quartz veins and pyritization that fill the fault zones. |
| keywords:gold deposi granite porphyry multi-stage hydrothermal activity isotope Gupao |
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