Mineral and geochernical characteristics of the Tieshanmiao-type BIF-iron deposit in Wuyang region of Henan Province and its implications for ore-forming processes
文献类型：期刊论文
| 作者 | Lan CaiYun1,2; Zhang LianChang3; Zhao TaiPing1; Wang ChangLe2,3; Li HongZhong3; Zhou YanYan3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2013-07-01 |
| 卷号 | 29期号:7页码:2567-2582 |
| 关键词 | Banded Iron Formations (Bifs) Wuyang Iron Deposit Tieshanmiao-type Iron Deposit Geochemistry Precambrian North China Craton |
| 文献子类 | Article |
| 英文摘要 | The Tieshanmiao-type iron deposit, part of the Wuyang iron deposit, is located at the southern margin of the North China Craton. The iron formation occurs in the supracrustal rocks of the Tieshanmiao Formation of the Neoarchaean Taihua Group. The chemical compositions of the magnetites and whole-rock samples from three types of ores (banded quartz-pyroxene-magnetite ore, massive pyroxene-magnetite ore, and massive quartz-magnetite ore) from the Tieshanmiao-type iron deposit are presented to investigate the ore-forming processes. The bulk chemistry of magnetite from different iron ore is as follows: FeOT (total iron oxide) contents of banded quartz-pyroxene-magnetite ore range from 90. 6% to 93. 1% and the average is 91. 8%. FeOT contents of massive pyroxene-magnetite ore range from 90. 7% to 91. 2% and the average is 91. 0%. FeOT contents of massive quartz-magnetite ore range from 92. 0% to 93. 0% and the average is 92. 4%. All these values are consistent with the theoretical FeOT value of magnetite. TiO2, MgO, MnO, CaO, Al2O Cr2O3 and NiO contents of the magnetites from different iron ores are alt very low (<0. 1%) without obvious variations among different types, suggesting that they are nearly pure magnetite, and typical of the banded iron formations (BIF). Mineral assemblages of ores (orthopyroxene + clinopyroxene) and host rock near orebody (hypersthene + plagioclase + quartz) indicate that the Tieshanmiao-type iron deposit has suffered high grade metamorphism. Quartz and magnetite became coarse-grained after recrystallization but still kept the original geochemical compositions. The three types of ores have similar SiO2, TiO2, AlO3 and P2O5, contents. But massive pyroxene-magnetite ore have higher MgO, MnO and CaO contents than the others, due to the presence of abundant ferroaugite and ferrosalite in the massive pyroxene-magnetite ore. All the ores have very low TiO, and Al2O3 contents, suggesting elastic materials were not involved in the ore-forming process. They also have similar REE + Y patterns with LREE depletions ((La/Yb)(PAAS) = 0. 29 similar to 0. 995 <1) and positive anomalies of La, Eu, and Y (La/La* = 1. 10 similar to 1. 89; Eu/Eu * = 1.30 similar to 2. 23;Y/Y* = 1. 47 similar to 1. 84), characteristics of modern seawater and hydrothermal fluids from mid-oceanic ridges. Therefore, we conclude that the Tieshanmiao-type iron deposit can be classified as BIF despite of later-stage metamorphism. |
| WOS关键词 | RARE-EARTH-ELEMENTS ; WEST GREENLAND ; TRANSVAAL SUPERGROUP ; GREENSTONE-BELT ; SOUTH-AFRICA ; SEAWATER ; GEOCHEMISTRY ; CHEMISTRY ; YTTRIUM ; SIGNATURES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000322926000021 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62626]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lan CaiYun,Zhang LianChang,Zhao TaiPing,et al. Mineral and geochernical characteristics of the Tieshanmiao-type BIF-iron deposit in Wuyang region of Henan Province and its implications for ore-forming processes[J]. ACTA PETROLOGICA SINICA,2013,29(7):2567-2582. |
| APA | Lan CaiYun,Zhang LianChang,Zhao TaiPing,Wang ChangLe,Li HongZhong,&Zhou YanYan.(2013).Mineral and geochernical characteristics of the Tieshanmiao-type BIF-iron deposit in Wuyang region of Henan Province and its implications for ore-forming processes.ACTA PETROLOGICA SINICA,29(7),2567-2582. |
| MLA | Lan CaiYun,et al."Mineral and geochernical characteristics of the Tieshanmiao-type BIF-iron deposit in Wuyang region of Henan Province and its implications for ore-forming processes".ACTA PETROLOGICA SINICA 29.7(2013):2567-2582. |
入库方式： OAI收割
来源：地质与地球物理研究所
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