| 青城子铅锌矿床的地球化学 |
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| 引用本文： | 蒋少涌,魏菊英.青城子铅锌矿床的地球化学[J].矿床地质,1989,8(4):20-28. |
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| 作者姓名： | 蒋少涌 魏菊英 |
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| 作者单位： | 中国地质科学院矿床地质研究所，北京大学地质系 |
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| 摘 要： | 青城子铅锌矿床赋存于元古代辽河群浪子山组和大石桥组中,严格受层位的控制。矿石组构上,出现了微莓球状构造、层纹状构造以及大量的变余和变生组构。含矿岩系的常、微量元素从下部层向上部层呈现规律性递变。黄铁矿和闪锌矿的微量元素特征显示其沉积成因。氧、碳同位素研究表明,成矿热液水主要为大气降水,碳主要来自地层。印支、燕山期构造岩浆活动对成矿具有一定影响。该矿床为一典型的沉积-变质-热液叠加改造型层控铅锌矿床。
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| 关 键 词： | 铅锌矿床 地球化学 矿床成因 |
Geochemistry of the Qingchengzi lead-zinc deposit |
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| Abstract: | The Qingchengzi ore deposit occurs in Proterozoic Langzishan and Dashiqiao formations of Liaohe Group. In the ores, there are lots of syngenetic sedimentary textures such as framboidal and striped ones as well as many palimpsest and metamorphic fabrics. The major and minor elements in wall rocks vary systematicaJly from lower to upper strata. The ratios of trace elements in pyrite and sphalerite indicate that they were formed originally by deposition. Oxygen and carbon isotopic studies show that the ore-forming fluids came from paleometeoric water, whereas the carbon from the strata. The Indosiniant-Yanshanian tectonic-magmatie activities also had some influence on metallogenesis. We therefore conclude that this deposit is a stratabound one which underwent deposition. Metamorphism and hydrothermal transformation. |
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