Geological features and genesis of the Neoarchean pyrite bearing Xiadianzi BIF, Qingyuan greenstone belt
文献类型：期刊论文
| 作者 | Peng ZiDong1,2,3; Zhang LianChang1,2; Wang ChangLe1,2; Tong XiaoXue1,2,3; Nan JingBo3,4 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2018 |
| 卷号 | 34期号:2页码:398-426 |
| 关键词 | Xiadianzi Bif Geological Features Ore Genesis Qingyuan Greenstone Belt Neoarchean |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The Neoarchean Qingyuan greenstone belt (QGB) is located in the northern margin of the North China Craton (NCC), despite close geological similarities with other greenstone belts in the NCC, the QGB is characterized by hosting the unique Volcanogenic Massive Sulfide (VMS) and Banded Iron Formation (BIF) (Algoma type) paragenetic assemblage, among which the Xiadianzi iron ore is a typical of these BIF. The Xiadianzi BIF is located in the bottom of the Nantianmen Formation of the QGB, the iron bearing lithofacies are amphibolites with minor garnet-mica schists. SIMS zircon U-Pb analyses on interbeded amphibolites suggest that the metamorphic age of the Xiadianzi BIF is 2497.8 +/- 7.4Ma, in suit oxygen isotopic analysis shows the metamorphic zircon yield 8180 values of 5.3 parts per thousand similar to 6.2 parts per thousand, which is similar to the value of the modern mantle, this indicate that the oxygen isotope of these zircons remain stable during the metamorphism. Ore types of the Xiadianzi BIF are mainly silicate type and pyrite-bands bearing type, most of the BIFs have low Al2O3, TiO2 and HFSE (for example Zr, Hf, Th, U) content, indicate they was no significant terrigenous input. In PAAS-normalized REE diagrams the two type ores both display distinctively seawater-like REE + Y profiles, characterized by positive La and Y anomalies and HREE enrichment relative to LREE. Consistently positive Eu anomalies are also observed, which are typically from high-T hydrothermal fluids. In addition, there was no Ce anomalies recoded in the Xiadianzi BIF indicate they might deposited in anoxic water. Comparing with other BIFs in the NCC, all the samples from Xiadianzi have predominantly higher CaO/(CaO + MgO) value and lower Y/Ho value, which might indicates the deposition took place close to the hydrothermal vents and the hydrothermal (mostly high-T fluid and perhaps some low-T fluid) has higher contribution to those BIFs. Furthermore, the pyrite-bands bearing type ore has higher LREE content and lower HREE content when compared with the silicate type, this might be related to the local hydrothermal activity during the precipitation. The geochemical features of amphibolites indicate they were derived from depleted mantle but obviously contaminatedby the continental crust during its emplacement, meanwhile, it also suggests these rocks formed at continental margin. Combined with previous geochronology and geochemical studies of the supracrustal rocks and TTG of QGB, we suggest the Xiadianzi BIF formed in a volcanic arc or back arc basin setting, which related to the subduction of an oceanic slab in the Neoarchean. |
| WOS关键词 | BANDED IRON-FORMATION ; NORTH CHINA CRATON ; RARE-EARTH-ELEMENTS ; MASSIVE SULFIDE DEPOSITS ; DALES-GORGE-MEMBER ; ANSHAN-BENXI AREA ; TRACE-ELEMENT ; WESTERN-AUSTRALIA ; LIAONING PROVINCE ; CHEMICAL-COMPOSITION |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000429429000016 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/88328]  |
| 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 |
| 通讯作者 | Zhang LianChang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Deep Sci & Engn, Deep Sea Sci Div, Sanya 572000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng ZiDong,Zhang LianChang,Wang ChangLe,et al. Geological features and genesis of the Neoarchean pyrite bearing Xiadianzi BIF, Qingyuan greenstone belt[J]. ACTA PETROLOGICA SINICA,2018,34(2):398-426. |
| APA | Peng ZiDong,Zhang LianChang,Wang ChangLe,Tong XiaoXue,&Nan JingBo.(2018).Geological features and genesis of the Neoarchean pyrite bearing Xiadianzi BIF, Qingyuan greenstone belt.ACTA PETROLOGICA SINICA,34(2),398-426. |
| MLA | Peng ZiDong,et al."Geological features and genesis of the Neoarchean pyrite bearing Xiadianzi BIF, Qingyuan greenstone belt".ACTA PETROLOGICA SINICA 34.2(2018):398-426. |
入库方式： OAI收割
来源：地质与地球物理研究所
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