| 鲁西南归来庄金矿成矿流体特征和演化 |
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| 引用本文： | 沈昆,倪培,林景仟.鲁西南归来庄金矿成矿流体特征和演化[J].地质科学,2001,36(1):1-13. |
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| 作者姓名： | 沈昆 倪培 林景仟 |
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| 作者单位： | 1. 山东省地质科学实验研究院 济南 250013;2. 南京大学成矿作用国家重点实验室 南京 210093;3. 吉林大学地质系 长春 130061 |
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| 基金项目： | 国家自然科学基金项目!(编号 :4 91 331 30，4 970 2 0 30 )，南京大学成矿作用国家重点实验室开放基金项目 |
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| 摘 要： | 归来庄金矿是近年来在鲁西南新发现的隐爆角砾岩型金矿床,成因上与附近铜石偏碱性杂岩体有关。本文通过对侵入杂岩和金矿床中流体包裹体研究,结合前人地质勘探和科研成果,认为形成归来庄金矿的成矿流体是岩浆水与大量来自围岩的大气降水混合而成,早期为富含卤素和CO2的低-中等盐度热液,演化至晚期为低挥发分、不同盐度的低温热水溶液。金矿沉淀时的流体压力不高于40～60MPa,温度为180～250℃。温度下降和伴随隐爆作用发生的减压和流体不混溶是促使金沉淀的主要因素。
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| 关 键 词： | 归来庄金矿 铜石杂岩体 隐爆角砾岩 流体包裹体 显微测温 |
| 收稿时间： | 1999-06-23 |
| 修稿时间： | 1999年6月23日 |
CHARACTERISTICS AND EVOLUTION OF ORE FLUIDS IN GUILAIZHUANG GOLD DEPOSIT,SOUTHWEST SHANDONG |
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| Shen Kun.CHARACTERISTICS AND EVOLUTION OF ORE FLUIDS IN GUILAIZHUANG GOLD DEPOSIT,SOUTHWEST SHANDONG[J].Chinese Journal of Geology,2001,36(1):1-13. |
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| Authors: | Shen Kun |
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| Institution: | 1. Shandong Institute of Geological Sciences, Jinan 250013;2. State Key Laboratory of Mineral Deposit Research, Nanjing University, Nanjing 210093;3. Department of Geology, Jilin University, Changchun 130061 |
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| Abstract: | The Guilaizhuang gold deposit, discovered recently in southwest Shandong province, China, is one of cryptoexplosive breccia type. The deposit occurs in the lower Paleozoic carbonate strata and is associated genetically with the Tongshi subalkaline igneous complex. Based on the fluid inclusion study of the gold deposit and of the igneous rocks and combined with the information obtained from exploration and research on the gold deposit, it is suggested that the ore fluids responsible for the Guilaizhuang gold deposit are the mixtures of magmatic water with a large quantity of meteoric water from the country rocks which were the high-temperature, halogen-and CO2-rich hydrothermal solutions with low to medium salinity during the early stage and evolved to the low temperature aqueous solutions containing minor volatiles with various salinities in the later stages. During the deposition of gold the fluid pressure was no more than 40～60 MPa while the temperature from 250℃ to less than 200℃. The decrease of temperature and fluid unmixing accompanied with the cryptoexplosion are the important factors causing gold deposition. |
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| Keywords: | The Guilaizhuang gold deposit The Tongshi Complex Cryptoexplosion Fluid inclusions Microthermometry |
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