| 山东昌邑莲花山铁矿矿床地质与矿石稀土、微量元素特征 |
| |
| 引用本文： | 王金辉,王巧云,刘汉栋,王立功.山东昌邑莲花山铁矿矿床地质与矿石稀土、微量元素特征[J].岩石矿物学杂志,2014,33(2):355-364. |
| |
| 作者姓名： | 王金辉 王巧云 刘汉栋 王立功 |
| |
| 作者单位： | 山东省地质调查院; |
| |
| 基金项目： | 中国地质调查局地质矿产调查专项项目(1212011085308) |
| |
| 摘 要： | 莲花山铁矿位于昌邑-安丘铁成矿带的中部,铁矿体赋存于古元古代粉子山群小宋组中。本文通过矿石地球化学特征及其与矽卡岩矿物组合和赋矿围岩结构特征的对比研究,证明了莲花山铁矿与条带状铁矿相似。莲花山铁矿矿石稀土元素含量较低,经页岩标准化的稀土元素配分模式呈现轻稀土元素亏损、重稀土元素富集的特征,具有明显的Eu、Y、La异常,为无明显Ce异常,Y/Ho比值反映了在其沉积时受到海水作用的影响,表明莲花山铁矿的稀土元素来源于火山热液和海水的混合溶液。微量元素中Ti、V、Co、Ni、Mn、Sr、Ba等含量较低,原始地幔标准化的微量元素配分曲线显示,U、La、Hf呈正异常,Ba、Nb、Ta、Sr呈负异常,SiO2/Al2O3、Ti/V、Ni/Co、和Sr/Ba的比值指示了莲花山铁矿成矿物质来源于火山物质的沉积。研究结果表明,莲花山铁矿成矿作用源于火山热液与海水的混合,成矿物质来自火山沉积物,其地质与地球化学特征与五台山铁矿一致,为火山沉积变质型铁矿床。
|
| 关 键 词： | 莲花山铁矿 条状状铁矿 稀土元素 微量元素 沉积环境 |
| 收稿时间： | 2013/4/24 0:00:00 |
| 修稿时间： | 2013/12/2 0:00:00 |
Geology, ore REE and trace elements characteristics of the Lianhuashan iron ore deposit in Changyi County, Shandong Province |
| |
| WANG Jin-hui,WANG Qiao-yun,LIU Han-dong and WANG Li-gong.Geology, ore REE and trace elements characteristics of the Lianhuashan iron ore deposit in Changyi County, Shandong Province[J].Acta Petrologica Et Mineralogica,2014,33(2):355-364. |
| |
| Authors: | WANG Jin-hui WANG Qiao-yun LIU Han-dong and WANG Li-gong |
| |
| Institution: | Shandong Institute of Geological Survey, Jinan 250013, China;Shandong Institute of Geological Survey, Jinan 250013, China;Shandong Institute of Geological Survey, Jinan 250013, China;Shandong Institute of Geological Survey, Jinan 250013, China |
| |
| Abstract: | Located in the middle part of the Changyi-Anqiu iron ore belt, the Lianhuashan iron ore deposit is considered to be a sedimentary metamorphic iron ore deposit occurring in the Xiaosong Formation of early Paleozoic Fenzishan Group. A comparative study of rock mineral composition, host rock and structure characteristics between this deposit and the skarn iron deposit shows that the Lianhuashan deposit is similar to the banded iron ore deposit. The REE values of the ore deposit are low. The shale-normalized REE patterns show relative depletion of LREE and enrichment of HREE, with obvious Eu, Y and La anomalies and no visible Ce anomaly. These characteristics indicate that REE of the Lianhuashan iron ore deposit originated from the mixture of volcanic hydrothermal and seawater. Y/Ho ratios show that the Lianhuashan iron ore deposit was metasomatised by seawater during its deposition. Trace elements, such as Ti, V, Co, Ni, Mn, Sr and Ba, are of low content. In the primary mantle-normalized trace element patterns, U, La and Hf have positive anomalies, Ba, Nb, Ta and Sr show negative anomalies, and ratios of SiO2/Al2O3, Ni/Co, Sr/Ba and Ti/V indicate that the ore-forming materials were derived from the sedimentation of the volcanic matter. This study suggests that ferruginous material of Lianhuashan BIF was associated with volcanic hydrothermal solution and formed in a marine chemical sedimentary environment. |
| |
| Keywords: | Lianhuashan iron ore deposit BIF REE trace element sedimentary environment |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩石矿物学杂志》浏览原始摘要信息 |
| 点击此处可从《岩石矿物学杂志》下载免费的PDF全文 |
|
