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| 刁泉银铜矿微量元素地球化学特征及其地质意义 |
| Geochemical characteristics of trace elements and its geological significance in Diaoquan silver-copper deposit |
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| DOI： |
| 中文关键词: 银铜矿床;地球化学;矽卡岩型矿床;刁泉 |
| 英文关键词: silver-copper deposit; geochemistry; skarn deposit; Diaoquan |
| 基金项目:山西省灵丘县刁泉银铜矿成矿规律及预测研究资助项目(2010021B007) |
| 作者 | 单位 | | 谢燕霄,吴堑虹,易洪波 | 中南大学 有色金属成矿预测教育部重点实验室,湖南 长沙 410083
中南大学 地球科学与信息物理学院,湖南 长沙 410083 |
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| 中文摘要: |
| 刁泉银铜矿为矽卡岩型矿床,矿体赋存在矿区中酸性岩体(花岗斑岩、石英斑岩、黑云母石英二长岩)周边的环形矽卡岩带中.为明确中酸性岩体与矿的关系,对矿床开展了微量元素地球化学综合研究:中酸性岩体、矽卡岩及大理岩都具有稀土总量均值较低(分别为162.77,119.9,24.84 mg/kg),轻稀土富集(LREE/HREE为5.95~27.9)和负铕异常(δEu=0.16~0.93)的特征;同时中酸性岩体富集W,Ag,Cu,Mo,矽卡岩、大理岩矿化元素地球化学特征与中酸性岩体相似;中酸性岩体富集大离子亲石元素Rb,亏损大离子亲石元素Sr,矽卡岩微量元素地球化学特征与岩体相似.综合分析表明矿化受中酸性岩体岩浆作用的影响,岩体为成矿物质携带者,该矽卡岩型矿床与中酸性岩体关系密切. |
| 英文摘要: |
| The Diaoquan silver-copper deposit is a skarn deposit. The ore body occurrence in the annular skarn zone that is around the neutral-acid rock mass (granite porphyry,quartz porphyry and biotite quartz monzonite). In this paper, the systematic study of trace element geochemical is carried out on this deposit, in order to determine the relationship between neutral-acid rock mass and ore. Neutral-acid rock mass, skarn and marble are resembled in the REE geochemical features, which is presented by low ΣREE, and they are enriched in LREE, and δEu is negative anomalies. Neutral-acid rock mass enrich W,Ag,Cu and Mo. The geochemical characteristics of mineralization elements in skarn and marble are similar to neutral-acid rock mass. Neutral-acid rock mass enriches lithophile element Rb, depleted in lithophile element Sr, which show that the rock mass has been contaminated by crust. The geochemical characteristics of trace elements in skarn and rock mass are similar. The comprehensive analysis suggests that the mineralization has been influenced by magmatism of neutral-acid rock mass, and rock mass is the metallogenic material carriers, and this skarn deposit is closely associated with Neutral-Acid rock mass. |
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