| 辽东青城子地区喷流_沉积成矿作用与金银多金属矿化的关系 |
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| 引用本文：.2007.Relationship between sedimentation_exhalation ore_forming process and gold_silver polymetallic mineralization in Qingchengzi area, Liaoning Province[J].Mineral Deposits,26(5):563~571 |
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| 基金项目:中国地质调查局国土资源大调查项目(K1.3.16；19991020152003；200010200149) |
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| 中文摘要:喷流_热水沉积硅质岩对于矿床研究具有重要意义。通过对青城子地区硅质岩系统的地质学、岩石学、矿物学的研究及对常量元素、微量元素及稀土元素等地球化学数据的分析，认为该地区硅质岩并不是来自陆源碎屑物质，也不是岩浆期后热液蚀变的产物，可能为来自海底喷流_沉积作用所形成的硅质与金、银、铅、锌硫化物一起聚集而成的一种产物，形成于浅海环境。结合区域地质构造演化特征，认为矿床早期存在热水喷流_沉积成岩成矿作用，在矿源岩阶段形成了金、银等金属元素的初步富集。硅质岩的时空分布规律为青城子地区进一步找矿工作开辟了新的思路。 |
| 中文关键词:地球化学 喷流_沉积 硅质岩 青城子地区 |
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| Relationship between sedimentation_exhalation ore_forming process and gold_silver polymetallic mineralization in Qingchengzi area, Liaoning Province |
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| Abstract:Sedimentation_exhalation siliceous rocks are of great significance in the study of ore deposits. Based on a systematic geological, petrological and mineralogical study of the siliceous rocks and an analysis of such geoche_mical data as major elements, trace elements and rare earth elements from Qingchengzi area, the authors hold that, instead of being terrigenous fragmental materials or products of post_magmatic hydrothermal alteration, the siliceous rocks might have resulted from the accumulation of the siliceous substances formed by submarine sedimentation_exhalation together with gold, silver, lead and zinc sulfides in a neritic environment. In combination with characteristics of regional geological_tectonic evolution, the authors also consider that there existed hydrothermal exhalation_sedimentary rock_forming and ore_forming processes at the early metallogenic stage, and metallic elements such as gold and silver were preliminarily concentrated at the stage of ore source rock formation. The temporal and spatial distribution of the siliceous rocks has opened up a new train of thought for further ore_prospecting work in Qingchengzi area. |
| keywords:geochemistry, sedimentation_exhalation, siliceous rock, Qingchengzi area |
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