| 杨光龙.水城铅锌矿元素组合和变化规律的统计分析[J].地质与勘探,2014,50(2):303-310 |
| 水城铅锌矿元素组合和变化规律的统计分析 |
| Statistical analysis of element combinations and their variations in the Shuicheng lead-zinc deposit |
| 投稿时间：2013-02-26 修订日期：2013-05-25 |
| DOI： |
| 中文关键词: 聚类分析 因子分析 元素组合 变化规律 铅锌矿 水城地区 黔西北 |
| 英文关键词: cluster analysis, factor analysis, element combination, change rule, lead-zinc deposit, Shuicheng area, northwest Guizhou Province |
| 基金项目:国家自然科学基金项目“贵州艾家坪－水城地区矿产远景调查”（编号:矿调[2006]5-4）资助。 |
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| 中文摘要: |
| [摘 要] 为揭示黔西北水城地区铅锌矿元素组合及变化规律，利用水城铅锌矿青山矿床岩石地球化学样品测试元素进行了R型聚类分析和因子分析。水城铅锌矿主要元素(氧化物)簇分为三类：一是以Pb-Zn-Ba为组合代表的成矿元素；二是以CaO-MgO、K2O-Al2O3、Cu-Ag-Cd为组合的成岩元素；三是成岩元素中受成矿因素影响而发生改造或迁移的元素，即Ag-Cu-Cd组合。由于成矿热卤水的多次活动和断层作用，蚀变围岩中SiO2、As受成矿因子和成岩因子的双重控制，而断层破碎带中则少了受成矿因素影响的元素，代之以Ba、MgO、SiO2为代表的蚀变岩石元素组合，Pb、Zn、Ba的关系更趋于密切。解释认为，它们的组合变化除受淋滤流失、成岩作用等主因子的支配外，还受到成矿热液作用的影响，是构造控矿的直接表现。 |
| 英文摘要: |
| Abstract: This work carried out R cluster analysis and factor analysis on rock samples under geochemical tests from the Qingshan deposit, Shuicheng lead-zinc ore district to reveal the rules of element combinations and their variations in the Shuicheng ore district of northwest Guizhou Province. The principal element (oxides) clusters in the Shuicheng lead-zinc ore district can be divided into three types: (1) ore-forming elements dominated by an element combination of Pb-Zn-Ba; (2) rock-forming elements dominated by element combinations of CaO-MgO, K2O-Al2O3 and Cu-Ag-Cd as the combination becomes the crag element; and (3) rock-forming elements deformed or migrated due to ore-forming precesses, i.e., an element combination of Ag-Cu-Cd. Affected by the multiple activities of ore-forming hot brine and faulting, the SiO2 and As in the altered wall rocks are controlled by both ore-forming and rock-forming factors. However, for those in the fault fracture zones, they are little affected by ore-forming processes. Hence, the element combination is Ba-MgO-SiO2, while Pb-Zn for the fault fracture zone. It is concluded that the variations of element assemblages not only depend upon the factors of leaching loss and diagenesis, but also are affected by ore-forming hot fluids, which shows a tectonic control on the ore-forming processes. |
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