不同国别进口铁矿石矿物学特征分析: 来自显微组分和元素分析的约束

张子傲; 刘恩涛; 许家省; 严德天; 刘曙; 闵红

doi:10.19509/j.cnki.dzkq.2021.0094

不同国别进口铁矿石矿物学特征分析: 来自显微组分和元素分析的约束

doi: 10.19509/j.cnki.dzkq.2021.0094

张子傲^1a,,
刘恩涛^1a, ,,
许家省^1a,
严德天^1b,
刘曙²,
闵红²

1a.
中国地质大学(武汉)海洋学院
1b.
中国地质大学(武汉)资源学院, 武汉 430074
2.
上海海关工业品与原材料检测技术中心, 上海 200135

基金项目:

国家重点研发计划 2018YFF0215402

详细信息

作者简介:
张子傲(1997-), 男, 现正攻读地质工程专业硕士学位, 主要从事沉积盆地分析研究工作。E-mail: 275415180@qq.com

通讯作者:
刘恩涛(1986-), 男, 副教授, 主要从事沉积盆地分析、盆地流体年代学研究工作。E-mail: liuentao@cug.edu.cn

中图分类号: P618.31
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- 被引次数: 0
出版历程
- 收稿日期: 2021-09-01

Analysis of mineralogical characteristics of imported iron ore from different countries: Constraints from maceral compositions and elemental analysis

Zhang Ziao^{1a
,},
Liu Entao^{1a
, ,},
Xu Jiaxing^1a,
Yan Detian^1b,
Liu Shu²,
Min Hong²

1a.
College of Marine Science and Techology, China University of Geosciences(Wuhan), Wuhan 430074, China
1b.
Faculty of Earth Resources, China University of Geosciences(Wuhan), Wuhan 430074, China
2.
Technical Center for Industrial Product and Raw Material Inspection and Testing, Shanghai Customs, Shanghai 200135, China

摘要

摘要:
我国是铁矿石资源进口大国，通过分析不同产地进口铁矿石的矿物学特征，可以为铁矿石原产地分析及固体废物属性鉴定提供参考依据。以11个常见进口国一级铁矿石样品为研究对象，综合运用偏光显微镜、X射线荧光光谱法（XRF）以及黄铁矿、磁铁矿LA-ICP-MS微量元素分析等方法，查明了各国铁矿石的元素组成和矿物组合特征，探究了不同产地铁矿石形成的地质环境。X射线荧光光谱分析表明铁矿石样品主要元素为Fe，O，其次为Si，Ca，Al，Mn，Tb，Ti，Mg，P，S，不同国别铁矿石元素含量存在差异。偏光显微镜光片鉴定表明铁矿石样品不仅矿物类型上存在差异，而且在副矿物种类和含量、结构构造等方面存在差别，这些差异性特征可以作为铁矿石产地判别的依据。磁铁矿微区原位微量元素的成因类型判别结果显示，澳大利亚磁铁矿主要为BIF建造型，而缅甸、老挝为矽卡岩型。采用多种技术表征不同产地铁矿石样品的矿物组成、元素含量、矿相组成、矿物形成环境的差异性，揭示了不同产地铁矿石样品的矿物学特征，对进口铁矿石质量的识别、管控和产地溯源具有重要意义。
- 铁矿石 /
- 矿相分析 /
- 微量元素 /
- LA-ICP-MS /
- 矿床成因类型
Abstract:
China is the largest importer of iron ore resources. Analyzing the mineralogical characteristics of imported iron ore samples imported from different countries can provide a reference for identifying the source of iron ore and solid waste attributes. In this paper, iron ore samples imported from 11 countries were used to determine their elemental compositions and mineral assemblages by polarized light microscopy investigation, X-ray fluorescence spectroscopy (XRF) and pyrite/magnetite LA-ICP-MS element analysis. These results are applied to explore the formation environment of iron minerals. XRF analysis results show that the main elements of iron ore samples are Fe and O, followed by Si, Ca, Al, Mn, Tb, Ti, Mg, P, and S. These elements are significant differences in iron ore among different countries. Polarizing microscopy investigation shows that there are great differences not only in mineral types but also in other aspects (e.g., accessory mineral types, accessory mineral content, and structure). These differences can be used as proxies for the identification of iron ore origin. Finally, in situ major and trace elements of magnetite were used to distinguish the genetic types of iron deposits. The magnetite deposits from Burma and Laos are skarn type, while those from Australia are mainly BIF type. In this study, multiple techniques were used to characterize the differences in element content, mineral facies composition and mineral-forming environment of iron ore samples and to comprehensively analyze the mineralogical characteristics of iron ore samples from different countries. These differences are of great significance for the identification, quality control and origin of imported iron ore resources.
- iron ore /
- mineral phase analysis /
- trace elements /
- LA-ICP-MS /
- genetic type of deposit

HTML全文

图 1 不同国别进口铁矿石样品主要元素质量分数折线图

Figure 1. Line chart of the major element contents of imported iron ore samples from different countries

下载: 全尺寸图片幻灯片

图 2 不同国别进口铁矿石金属矿物显微矿相图

A.缅甸样品中的磁铁矿、赤铁矿、黄铁矿，反射光下；B.乌克兰样品中的赤铁矿，斜照光下；C.老挝样品中磁铁矿向赤铁矿转化，反射光下；D.加拿大样品中钛铁矿、赤铁矿、磁铁矿，正交偏光下；E.澳大利亚样品中的赤铁矿与褐铁矿，正交偏光下；F.南非样品中的赤铁矿与黄铁矿，反射光下；G.南非样品中赤铁矿与褐铁矿，正交偏光下；H.智利样品中钛铁矿与黄铁矿，反射光下；I.吉尔吉斯斯坦样品中的钛铁矿与黄铁矿，反射光下。Hem.赤铁矿; Mag.磁铁矿; Py.黄铁矿; Ilm.钛铁矿; Lm.铁矿

Figure 2. Microscopic photos showing mineral compositions of imported iron ore from different countries

下载: 全尺寸图片幻灯片

图 3 不同国别进口铁矿石透明矿物显微矿相图

A.缅甸样品中的方解石，正交偏光下；B.智利样品中的绿泥石，单偏光下；C.哈萨克斯坦样品中的绢云母，正交偏光下；D.缅甸样品中的辉石，正交偏光下；E.缅甸样品中的绿泥石，正交偏光下；F.巴西样品中石英，正交偏光下。Cal.方解石; Cfs.绿泥石; Ser.绢云母; Qtz.石英; Aug.辉石

Figure 3. Microscopic photos of transparent minerals in iron ores from different countries

下载: 全尺寸图片幻灯片

图 4 不同国别进口铁矿石矿相结构显微图

A.缅甸铁矿石样品中发育的网状结构，自然光下；B.哈萨克斯坦铁矿石样品中发育的交代结构、网状结构，自然光下；C.伊朗铁矿石样品中发育的交代结构，自然光下；D.智利铁矿石样品发育的解理结构，自然光下；E.巴西铁矿石样品中发育的板状结构，自然光下；F.南非铁矿石样品中发育的文象结构，自然光下

Figure 4. Micrograph showing the textures of imported iron ore from different countries

下载: 全尺寸图片幻灯片

图 5 不同国别进口铁矿石中磁铁矿主要微量元素质量分数

Figure 5. Trace elements diagram of magnetite in imported iron ores from different countries

下载: 全尺寸图片幻灯片

图 6 不同国别进口铁矿石中磁铁矿微量元素的矿床识别类型^[23]

BIF.条带状含铁建造型；IOCG.铁氧化物-铜-金型；Kiruna.基律纳型；Fe-Ti-V.钒钛磁铁矿型

Figure 6. Magnetite trace elements diagram showing ore deposit types of iron ores imported from different countries

下载: 全尺寸图片幻灯片

图 7 不同国别进口铁矿石中黄铁矿主要微量元素质量分数

Figure 7. Trace elements diagram of pyrite in imported iron ores from different countries

下载: 全尺寸图片幻灯片

表 1 进口铁矿石样品产地及其他信息

Table 1. Imported iron ore sample origin and other information

国别	品名	品牌	入境口岸
巴西	铁矿粉	Sinter Feed High SiliconGuaiba	上海
哈萨克斯坦	球团矿	球团矿	阿拉山口
加拿大	粉矿	Concentrate Fine	上海
缅甸	铁矿石	铁矿石	云南自治
老挝	铁矿	铁矿砂	日照
伊朗	球团矿	球团矿	日照
南非	铁矿粉	精粉Iron Ore (Magnetite)	上海
澳大利亚	铁块矿	纽曼块	上海
智利	粉矿	ATACAMA PFCNN	湛江
吉尔吉斯斯坦	铁矿粉	铁精粉	阿拉山口
乌克兰	铁矿粉	Agglomerate精粉65.0	上海

下载: 导出CSV

表 2 不同国别进口铁矿石偏光显微镜金属矿物鉴定结果

Table 2. Results of metal minerals identified by polarizing microscope in iron ore from different imported countries

原产国	主要矿物	其他次要矿物	特异性指标
巴西	赤铁矿	磁铁矿	板状结构和网状结构
哈萨克斯坦	赤铁矿	磁铁矿	含绢云母
加拿大	磁铁矿	赤铁矿	主矿物不单一
缅甸	磁铁矿	黄铁矿、赤铁矿	矿物种类多、矿物结构多
老挝	磁铁矿	赤铁矿	磁铁矿向赤铁矿转化
伊朗	磁铁矿	赤铁矿	赤铁矿向磁铁矿转化
南非	赤铁矿	褐铁矿、黄铁矿	矿物晶体细小
澳大利亚	赤铁矿	磁铁矿	赤铁矿中均含有褐铁矿
智利	钛铁矿	黄铁矿	含大量绿泥石
吉尔吉斯斯坦	钛铁矿	黄铁矿	无明显特征
乌克兰	赤铁矿	钛铁矿	无明显特征

下载: 导出CSV

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