| 宁夏卫宁北山地区矿床类型及成矿时代 |
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| 引用本文：艾宁,任战利,李文厚,张连昌,黄世武.2011.Metallogenic epoch and ore_forming types of ore deposits in Weiningbeishan area, Ningxia[J].Mineral Deposits,30(5):941~948 |
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| 基金项目:本文得到中央地勘基金宁夏卫宁北山多金属矿预查项目的资助 |
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| 中文摘要:从大地构造位置及区域成矿背景来看，卫宁北山地区具备寻找到大型多金属矿床的良好前景。笔者对黄石坡沟典型矿段的研究，证明了该区广泛出露的石英闪长玢岩与成矿的关系非常密切。为了确定该矿床的成矿时代，首次使用锆石微区定年技术，对二人山、金场子等典型矿段中闪长玢岩内的锆石进行了年龄测定，确定了该区有2期岩浆侵入活动，2期岩浆侵入均与该区成矿关系密切。笔者还系统研究了该矿区的成矿类型，认为其总体上是一个统一的构造-岩浆热液成矿系统，目前已发现的矿床的成因类型属于浅成中-低温热液矿床，其工业类型属于构造蚀变岩型矿床。 |
| 中文关键词:地质学 地球化学 成矿时代 成矿类型 金属矿 卫宁北山 宁夏 |
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| Metallogenic epoch and ore_forming types of ore deposits in Weiningbeishan area, Ningxia |
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| Abstract:Considering the favorable prospects for forming large complex deposits in the Weiningbeishan area of Ningxia because of its unique tectonic structure circumstances and regional mineralization background, the authors' researches focused on this promising area. A study of the typical Huangshipo ore block reveals that the quartz diorite porphyrite veins widely exposed here are closely related to mineralization. In order to further confirm the metallogenic epoch, the authors used for the first time zircon microdomain dating technology in the study area. In Errenshan and Jinchangzi areas, sampling of zircons was conducted in quartz diorite porphyrite veins existent in the typical ore block. Zircon dating has confirmed that there are two-period magmatic intrusions in the area, they all related to mineralization. The authors also systematically investigated the deposit type for the first time, and found that it is of the structure-magmatic hydrothermal ore-forming system. The ore deposit should be of the low-to-moderate temperature hydrothermal type, and the industrial type should be tectonic alteration type. |
| keywords:geology, geochemistry, metallogenic epoch, ore-forming types, metal mine, Weiningbeishan, Ningxia |
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