Mineralization and magmatic origin of the 2.1 Ga Zhaoanzhuang magnetite-apatite deposit, North China Craton: Constraints on the formation of the Paleoproterozoic iron oxide-apatite deposits
Iron oxide-apatite (IOA) deposits provide large amounts of iron for steel industry worldwide, but their origins are still in dispute. Although IOA deposits were commonly genetically related to intermediate-mafic igneous rocks, the occurrences of IOA deposits in ultramafic rocks are scarce. The Zhaoa...
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ftchacadscgigcas:oai:ir.gig.ac.cn:344008/68461 2023-05-15T17:04:22+02:00 Mineralization and magmatic origin of the 2.1 Ga Zhaoanzhuang magnetite-apatite deposit, North China Craton: Constraints on the formation of the Paleoproterozoic iron oxide-apatite deposits Lan, Caiyun Long, Xiaoping Zhao, Taiping Zhai, Mingguo 2022-09-15 http://ir.gig.ac.cn/handle/344008/68461 https://doi.org/10.1016/j.precamres.2022.106839 英语 eng ELSEVIER PRECAMBRIAN RESEARCH http://ir.gig.ac.cn/handle/344008/68461 doi:10.1016/j.precamres.2022.106839 Geology Iron oxide-apatite Magnetite Apatite Fe -O isotope In-situ Sr-Nd isotope Zhaoanzhuang Geosciences Multidisciplinary HYDROTHERMAL PROCESSES EVIDENCE TRACE-ELEMENT CONCENTRATIONS KIRUNA-TYPE OXYGEN-ISOTOPE CARBONATITE COMPLEX ACCESSORY MINERALS SOUTHEAST MISSOURI PEA RIDGE GEOCHEMISTRY MANTLE 期刊论文 2022 ftchacadscgigcas https://doi.org/10.1016/j.precamres.2022.106839 2022-12-19T19:17:16Z Iron oxide-apatite (IOA) deposits provide large amounts of iron for steel industry worldwide, but their origins are still in dispute. Although IOA deposits were commonly genetically related to intermediate-mafic igneous rocks, the occurrences of IOA deposits in ultramafic rocks are scarce. The Zhaoanzhuang iron deposit in the North China Craton is characterized by comprising abundant low-Ti magnetite, apatite and ultramafic minerals (e.g., olivine, orthopyroxene), but its origin has long been controversial. These ultramafic minerals mainly occur as aggregates surrounded by magnetite in the iron ores and display typical cumulate textures and high Fo values, indicative of magmatic origin. The delta 56Fe and delta 18O values of magnetite from the ores range from 0.22 & PLUSMN; 0.03%o to 0.32 & PLUSMN; 0.03%o and from 2.6%o to 4.5%o, respectively, akin to those in magmatic rocks and IOA deposits but distinct from those of metamorphic BIFs. Both types of apatite occurring in the ultramafic aggregates and the iron ores contain 2.07 to 2.69 wt% F, less than 0.65 wt% Cl, up to 7900 ppm rare earth elements (REE) and greatly variable Sr-Nd isotopic compositions, reflecting that both types are of magmatic-hydrothermal origin. The crust-like epsilon Nd(t) values (-7.1 to-5.2) of all apatite grains record reset of their Sm-Nd system, which is resulted from the involvement of carbonate fluids based on their similar REE patterns. In situ Sm-Nd isotope analyses of apatite from the ultramafic aggregates and the iron ores have yielded similar Sm-Nd isochron ages at 2100 & PLUSMN; 81 Ma (MSWD = 0.84) and 2096 & PLUSMN; 240 Ma (MSWD = 0.85), respectively, which can constrain the minimum age for the Fe mineralization. Combined with sedimentary age of the strata, the ore-forming age of the deposit was 2.3-2.1 Ga. The negative epsilon Nd(t) values of the ultramafic aggregates (-1.2 to-1.0), the iron ores (-1.8 to-1.5) and magnetite (-1.6 to-0.8) from the ores indicate that the ore-forming magma has a slightly enriched ... Report Kiruna Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) Kiruna Precambrian Research 380 106839 |
institution |
Open Polar |
collection |
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchacadscgigcas |
language |
English |
topic |
Geology Iron oxide-apatite Magnetite Apatite Fe -O isotope In-situ Sr-Nd isotope Zhaoanzhuang Geosciences Multidisciplinary HYDROTHERMAL PROCESSES EVIDENCE TRACE-ELEMENT CONCENTRATIONS KIRUNA-TYPE OXYGEN-ISOTOPE CARBONATITE COMPLEX ACCESSORY MINERALS SOUTHEAST MISSOURI PEA RIDGE GEOCHEMISTRY MANTLE |
spellingShingle |
Geology Iron oxide-apatite Magnetite Apatite Fe -O isotope In-situ Sr-Nd isotope Zhaoanzhuang Geosciences Multidisciplinary HYDROTHERMAL PROCESSES EVIDENCE TRACE-ELEMENT CONCENTRATIONS KIRUNA-TYPE OXYGEN-ISOTOPE CARBONATITE COMPLEX ACCESSORY MINERALS SOUTHEAST MISSOURI PEA RIDGE GEOCHEMISTRY MANTLE Lan, Caiyun Long, Xiaoping Zhao, Taiping Zhai, Mingguo Mineralization and magmatic origin of the 2.1 Ga Zhaoanzhuang magnetite-apatite deposit, North China Craton: Constraints on the formation of the Paleoproterozoic iron oxide-apatite deposits |
topic_facet |
Geology Iron oxide-apatite Magnetite Apatite Fe -O isotope In-situ Sr-Nd isotope Zhaoanzhuang Geosciences Multidisciplinary HYDROTHERMAL PROCESSES EVIDENCE TRACE-ELEMENT CONCENTRATIONS KIRUNA-TYPE OXYGEN-ISOTOPE CARBONATITE COMPLEX ACCESSORY MINERALS SOUTHEAST MISSOURI PEA RIDGE GEOCHEMISTRY MANTLE |
description |
Iron oxide-apatite (IOA) deposits provide large amounts of iron for steel industry worldwide, but their origins are still in dispute. Although IOA deposits were commonly genetically related to intermediate-mafic igneous rocks, the occurrences of IOA deposits in ultramafic rocks are scarce. The Zhaoanzhuang iron deposit in the North China Craton is characterized by comprising abundant low-Ti magnetite, apatite and ultramafic minerals (e.g., olivine, orthopyroxene), but its origin has long been controversial. These ultramafic minerals mainly occur as aggregates surrounded by magnetite in the iron ores and display typical cumulate textures and high Fo values, indicative of magmatic origin. The delta 56Fe and delta 18O values of magnetite from the ores range from 0.22 & PLUSMN; 0.03%o to 0.32 & PLUSMN; 0.03%o and from 2.6%o to 4.5%o, respectively, akin to those in magmatic rocks and IOA deposits but distinct from those of metamorphic BIFs. Both types of apatite occurring in the ultramafic aggregates and the iron ores contain 2.07 to 2.69 wt% F, less than 0.65 wt% Cl, up to 7900 ppm rare earth elements (REE) and greatly variable Sr-Nd isotopic compositions, reflecting that both types are of magmatic-hydrothermal origin. The crust-like epsilon Nd(t) values (-7.1 to-5.2) of all apatite grains record reset of their Sm-Nd system, which is resulted from the involvement of carbonate fluids based on their similar REE patterns. In situ Sm-Nd isotope analyses of apatite from the ultramafic aggregates and the iron ores have yielded similar Sm-Nd isochron ages at 2100 & PLUSMN; 81 Ma (MSWD = 0.84) and 2096 & PLUSMN; 240 Ma (MSWD = 0.85), respectively, which can constrain the minimum age for the Fe mineralization. Combined with sedimentary age of the strata, the ore-forming age of the deposit was 2.3-2.1 Ga. The negative epsilon Nd(t) values of the ultramafic aggregates (-1.2 to-1.0), the iron ores (-1.8 to-1.5) and magnetite (-1.6 to-0.8) from the ores indicate that the ore-forming magma has a slightly enriched ... |
format |
Report |
author |
Lan, Caiyun Long, Xiaoping Zhao, Taiping Zhai, Mingguo |
author_facet |
Lan, Caiyun Long, Xiaoping Zhao, Taiping Zhai, Mingguo |
author_sort |
Lan, Caiyun |
title |
Mineralization and magmatic origin of the 2.1 Ga Zhaoanzhuang magnetite-apatite deposit, North China Craton: Constraints on the formation of the Paleoproterozoic iron oxide-apatite deposits |
title_short |
Mineralization and magmatic origin of the 2.1 Ga Zhaoanzhuang magnetite-apatite deposit, North China Craton: Constraints on the formation of the Paleoproterozoic iron oxide-apatite deposits |
title_full |
Mineralization and magmatic origin of the 2.1 Ga Zhaoanzhuang magnetite-apatite deposit, North China Craton: Constraints on the formation of the Paleoproterozoic iron oxide-apatite deposits |
title_fullStr |
Mineralization and magmatic origin of the 2.1 Ga Zhaoanzhuang magnetite-apatite deposit, North China Craton: Constraints on the formation of the Paleoproterozoic iron oxide-apatite deposits |
title_full_unstemmed |
Mineralization and magmatic origin of the 2.1 Ga Zhaoanzhuang magnetite-apatite deposit, North China Craton: Constraints on the formation of the Paleoproterozoic iron oxide-apatite deposits |
title_sort |
mineralization and magmatic origin of the 2.1 ga zhaoanzhuang magnetite-apatite deposit, north china craton: constraints on the formation of the paleoproterozoic iron oxide-apatite deposits |
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ELSEVIER |
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2022 |
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http://ir.gig.ac.cn/handle/344008/68461 https://doi.org/10.1016/j.precamres.2022.106839 |
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PRECAMBRIAN RESEARCH http://ir.gig.ac.cn/handle/344008/68461 doi:10.1016/j.precamres.2022.106839 |
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https://doi.org/10.1016/j.precamres.2022.106839 |
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