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  4. 中国科学院矿产资源研究重点实验室
Geochemical Characteristics of Wuyang Siliceous Rocks in the Southern Margin of North China Craton and its Constraint on the Formation Environment of BIF of Tieshanmiao Formation

文献类型：期刊论文

作者Li Hongzhong4,5,6; He Junguo6; Liang Jin1,2; Yang Fei4; Zhai Mingguo5; Zhang Lianchang5; Panagiotis, Voudouris3
刊名ACTA GEOLOGICA SINICA-ENGLISH EDITION
出版日期2019-12-01
卷号93期号:6页码:1738-1754
关键词siliceous rock banded iron formation geochemistry Tieshanmiao Formation Wuyang area
ISSN号1000-9515
DOI10.1111/1755-6724.14366
英文摘要Precambrian banded iron formation (BIF) is one of the most important mineral resources in China, mostly abundant in the North China Craton (NCC) with relatively less common in South China. Since the BIF and siliceous rocks both originated from chemical deposition, the syngenetic BIF and Siliceous rocks can help evaluate their environment of formation. We examine here the mineralogy and geochemistry of siliceous rocks associated with the Tieshanmiao Formation BIF, aiming to decipher the conditions of formation of both BIF and Siliceous rocks in the Wuyang area in the NCC. Analysis of the geochemical characteristics of whole rock shows that the SiO2 content of the siliceous rock ranges from 90.11% to 94.85% and is relatively high overall. Trace element contents of Ba and U are also high, the Ba/Sr ratio ranges from 3.89 to 25.28 and the U/Th ratio ranges from 0.09 to 0.20. Finally, the sigma REE value of rare earth elements ranges from 57.03 ppm to 152.59 ppm, and these indexes all indicate that siliceous rock resulted from hydrothermal deposition. Plots of Al2O3-SiO2, SiO2/(K2O+Na2O)-MnO2/TiO2 and Mn-10x(Cu+Co+Ni)-Fe in discrimination diagrams also verify this interpretation. However, both the MgO content, ranging from 0.16 to 0.32, and the Fe/Ti ratio, ranging from 2.50 to 9.72, suggest that terrigenous material was added during the depositional process. Major and trace element parameters of siliceous rock, such as the Al/(A1+Fe+Mn) ratio (from 0.81 to 0.93), MnO/TiO2 (from 0.00 to 0.17), Al/(Al+Fe) (from 0.82 to 0.93), Sc/Th ratio (from 0.21 to 0.50), U/Th (from 0.09 to 0.20), (La/Yb)(N) (from 0.83 to 3.04), and the (La/Ce)(N) (from 0.01 to 0.02) all imply that the siliceous rock formed in a continental margin. In addition, the Sr/Ba ratio from 0.08 to 0.26, the delta Ce value from 0.31 to 0.90, and the delta Eu value from 0.14 to 0.58, all indicate that the siliceous rock was formed at a relatively deeper water depth and under weak hydrodynamic conditions. Siliceous rock and BIF formed in the same geological setting, with the SiO2/(K2O+Na2O) ratio of siliceous rock ranging from 28.61 to 47.43, the SiO2/Al2O3 ratio from 16.53 to 32.37, and the SiO2/MgO ratio from 287.28 to 592.81, which are all in agreement with chemical deposition associated with volcanic eruptions. The Al2O3/TiO2 ratio from 37.82 to 50.30 indicates that the magma source of siliceous rock was of slightly intermediate composition. During the Late Archean in the Wuyang area, the high concentration and high purity SiO2 quickly precipitated from hydrothermal fluids to finally result in the accumulation of siliceous rock in a marginal sea, while the input corresponding to iron formation components was deposited to form iron formation layers, and limestone was only the product formed during the deposition intervals of siliceous rock and iron formations. In this study, the synsedimentary siliceous rocks of BIF act as a new way to provide direct evidence to understand the formation environment of BIF due to its high geochemical stability.
WOS关键词BANDED IRON-FORMATIONS ; RARE-EARTH-ELEMENTS ; SEDIMENTARY-ROCKS ; GEOLOGICAL SIGNIFICANCE ; LIAONING PROVINCE ; FORMATION AGE ; CHERT ; DEPOSIT ; ORIGIN ; AREA
资助项目NSFC[41806076] ; NSFC[41303025] ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China[JG1905] ; National Program on Key Basic Research Project (973 Program) of China[2012CB406601]
WOS研究方向Geology
语种英语
WOS记录号WOS:000505305900009
出版者WILEY
资助机构NSFC ; NSFC ; NSFC ; NSFC ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; NSFC ; NSFC ; NSFC ; NSFC ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; NSFC ; NSFC ; NSFC ; NSFC ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; NSFC ; NSFC ; NSFC ; NSFC ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; Scientific Research Fund of the Second Institute of Oceanography, MNR of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China ; National Program on Key Basic Research Project (973 Program) of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/95853]  
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He Junguo; Liang Jin
作者单位1.Minist Nat Resources, Key Lab Submarine Geosci, Hangzhou 30012, Zhejiang, Peoples R China
2.Second Inst Oceanog, Minist Nat Resources, Hangzhou 310012, Zhejiang, Peoples R China
3.Univ Athens, Dept Mineral Petrol, Athens 15784, Greece
4.Guangdong Univ Technol, Sch Civil & Transportat Engn, Guangzhou 510006, Guangdong, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resource, Beijing 100029, Peoples R China
6.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Provincal Key Lab Geodynam & Geohazards, Guangdong Provincal Key Lab Geol Proc & Mineral R, Guangzhou 510275, Guangdong, Peoples R China
推荐引用方式
GB/T 7714		 Li Hongzhong,He Junguo,Liang Jin,et al. Geochemical Characteristics of Wuyang Siliceous Rocks in the Southern Margin of North China Craton and its Constraint on the Formation Environment of BIF of Tieshanmiao Formation[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2019,93(6):1738-1754.
APA Li Hongzhong.,He Junguo.,Liang Jin.,Yang Fei.,Zhai Mingguo.,...&Panagiotis, Voudouris.(2019).Geochemical Characteristics of Wuyang Siliceous Rocks in the Southern Margin of North China Craton and its Constraint on the Formation Environment of BIF of Tieshanmiao Formation.ACTA GEOLOGICA SINICA-ENGLISH EDITION,93(6),1738-1754.
MLA Li Hongzhong,et al."Geochemical Characteristics of Wuyang Siliceous Rocks in the Southern Margin of North China Craton and its Constraint on the Formation Environment of BIF of Tieshanmiao Formation".ACTA GEOLOGICA SINICA-ENGLISH EDITION 93.6(2019):1738-1754.

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来源：地质与地球物理研究所

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