| 广东长埔—吉水门锡矿带某些成矿规律和矿床成因 |
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| 引用本文：.1989.Metallogenic regularlty and genesis of tin deposits in Changpu-Jishuimen tin ore zone, guangdong province[J].Mineral Deposits,8(4):11~19 |
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| 中文摘要:广东长埔—吉水门锡矿带内的锡矿床(点)几乎毫无例外地赋存于下侏罗统金鸡群第二亚群中，锡矿带的展布格局和矿体的形态、产状等特征说明，锡矿受地层层位控制。锡矿带受莲花山断裂带的次一级断裂制约，矿床、矿体主要产于NE—NEE向甸层阅滑动断裂及其派生裂隙巾，锡矿具有构造定位的特征。矿床一般经历了早、晚两个成矿期，第一成矿期发生于晚侏罗世火山作用之前，第二成矿期形戍于晚侏罗世末期至早自垩世。成矿物质是多来源的，但主要来自地层。金鸡群地层富含锡等成矿组分，是重要的矿源层。成矿溶液以变质水为：并有大气降水混入。锡矿床属沉积一变成层控矿床。 |
| 中文关键词:长埔一吉水门锡矿带 沉积—变成层控锡矿床 广东 |
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| Metallogenic regularlty and genesis of tin deposits in Changpu-Jishuimen tin ore zone, guangdong province |
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| Abstract:The tin ore deposits(occurrences)in Changpu-Jishuimen tin ore zone almost unexceptionally occur in 2nd subgroup of Lower Jurassic Jiuji Group．The distribution pattern of the tin ore zone and the shape and mode of occurrence of orebodies indicate that the ore deposits are controlled by the stratigraphic horizon. The tin ore zone is restricted by the second-order fractures of the Lianhuashan fault belt, and the ore deposits and orebodies mainly occur along the NE-NEE interlayer-gliding fractures and their derivative fissnres, showing structural posttioning features. The ore deteosits generally underwent early and late metaIlogenic epochs, the first one taking place before tile late Jurassic volcanism and the second at the end of Jurassic to Early Cretaceous. The ore-forming substances came from several sources but mainly from the strata. The Jinji Group was enriched in tin and some other metallogenic elements and thus served as an important source bed. The ore-forming so lutions were mainly nletalllorphous water which however was mixed with some meteoric water. The tin deposits are of sedimentary-metamorphogenic stratabound type. |
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