| 曾茜,陈守余,赵江南.个旧卡房蚀变花岗岩地球化学特征及其与成矿的关系[J].地质找矿论丛,2016,31(2):163-171 |
| 个旧卡房蚀变花岗岩地球化学特征及其与成矿的关系 |
| Geochemical characteristics of Kafang altered granitein Gejiu city and its relationship with mineralization |
| 投稿时间：2015-11-18 |
| DOI：10.6053/j.issn.1001-1412.2016.02.002 |
| 中文关键词: 卡房 蚀变花岗岩 地球化学特征 成矿富集 个旧 云南省 |
| 英文关键词:Kafang altered granite geochemical characteristics Enrichment of ore-forming elements Gejiu Yunnan province |
| 基金项目:国家自然科学基金青年科学基金项目(编号:41302264)资助。 |
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| 中文摘要: |
| 文章通过分析个旧卡房不同蚀变花岗岩地球化学特征,表明花岗岩总体上呈强酸性、富碱性、铝过饱和、贫基性特点;富集轻稀土模式,显强烈的负铕异常。花岗岩富集Sn、W等成矿元素,具有很好的含矿性。不同蚀变类型对常量、微量、稀土元素的地球化学特征影响有差异,钾化使其具有强富钾特征,绿泥石化使稀土元素特征变化较大,并且这些元素的迁入迁出是影响成矿元素富集的直接因素。与成矿最为密切的是钾化、电气石化、萤石化、黄铁矿化,可作为找矿标志。卡房矿田具有与老卡岩体西凹蚀变岩型矿床类似矿体的找矿潜力。 |
| 英文摘要: |
| Analysis of geochemical characteristics of different alteration granite in Kafang area shows that Kafang granite body is generally characterized by strong acidity, rich alkaline materials, peraluminoity, poor basic materials and strong Eu-depleted REE pattern. The granite is rich in ore elements, such as Sn、W etc. with good ore-bearing property. Alterations are varied in their geochemical characteristics of constant, trace and REE. K-alteration is characterized by K-concentration; chloritization by evident variation of REE. Migration in and out of these elements is the direct factor of affecting the enrichment of ore-forming elements. K-alteration, tourmalinization, fluoritization and pyritization are closely related with the enrichment of ore-forming elements thus can be used as prospecting marks. Kafang granite is potential for prospecting Xiao altered rock type ore deposit developed in Laoka rock body. |
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