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Minerals
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Rare Earth Elements and Their Isotope Geochemistry
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Rare Earth Elements and Their Isotope Geochemistry

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Geochemistry and Geochronology".

Deadline for manuscript submissions: closed (15 January 2021) | Viewed by 11205

Special Issue Editors

Dr. Seung-Gu Lee

E-Mail Website
Guest Editor
Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Korea
Interests: rare earth element geochemistry; isotope geochemistry; mass spectrometry
Prof. Dr. Hossein Azizi

E-Mail Website
Guest Editor
Department of Mining Engineering, Faculty of Engineering, University of Kurdistan, Pasdaran St, Sanandaj, Kurdistan, Iran
Interests: isotope geochemistry; geodynamics; igneous petrogenesis
Special Issues, Collections and Topics in MDPI journals
Dr. Ji-Hoon Kim

E-Mail Website
Guest Editor
Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Korea
Interests: marine geochemistry

Special Issue Information

Dear Colleagues,

Rare earth elements, which consist of 15 elements from La to Lu, are powerful research tools in the earth sciences (especially in the field of geochemistry). In particular, since Dr. Akimasa Masuda, a professor at the University of Tokyo, Japan, devised an interpretive method to understand the geochemical significance of rare earth element abundance in geological material, rare earth element geochemistry has become one of the most powerful tools for understanding the evolution history of the Earth System, such as magma sources, geodynamics and tectonic settings. Radiogenic isotope systems such as Sm–Nd and La–Ce have also provided insight into the age of rock formation. Recently, in addition to the development of advanced mass spectrometers such as MC–ICP–MS, isotope fractionation studies using stable isotopes of rare earth elements such as Ce, Nd, and Eu have also become possible.

In this Special Issue, we are looking for research output for the future of rare earth element geochemistry, including the latest research techniques related to rare earth elements and the application of geochemistry.

Dr. Seung-Gu Lee
Prof. Hossein Azizi
Dr. Ji-Hoon Kim
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Minerals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • rare earth element geochemistry
  • isotope geochemistry
  • earth system

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Published Papers (3 papers)

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Research

15 pages, 6725 KiB  
Article
REE and Sr–Nd Isotope Characteristics of Cambrian–Ordovician Carbonate in Taebaek and Jeongseon Area, Korea
by Tae-Hyeon Kim, Seung-Gu Lee and Jae-Young Yu
Minerals 2021, 11(3), 326; https://doi.org/10.3390/min11030326 - 21 Mar 2021
Cited by 1 | Viewed by 2869
Abstract
Carbonate formations of the Cambro-Ordovician Period occur in the Taebaek and Jeongseon areas, located in the central–eastern part of the Korean Peninsula. This study analyzed the rare earth element (REE) contents and Sr–Nd isotope ratios in these carbonates to elucidate their depositional environment [...] Read more.
Carbonate formations of the Cambro-Ordovician Period occur in the Taebaek and Jeongseon areas, located in the central–eastern part of the Korean Peninsula. This study analyzed the rare earth element (REE) contents and Sr–Nd isotope ratios in these carbonates to elucidate their depositional environment and diagenetic history. The CI chondrite-normalized REE patterns of the carbonates showed negative Eu anomalies (EuN/(SmN × GdN)1/2 = 0.50 to 0.81), but no Ce anomaly (Ce/Ce* = CeN/(LaN2 × NdN)1/3 = 1.01 ± 0.06). The plot of log (Ce/Ce*) against sea water depth indicates that the carbonates were deposited in a shallow-marine environment such as a platform margin. The 87Sr/86Sr ratios in both Taebaek and Jeongseon carbonates were higher than those in the seawater at the corresponding geological time. The 87Sr/86Sr ratios and the values of (La/Yb)N and (La/Sm)N suggest that the carbonates in the areas experienced diagenetic processes several times. Their 143Nd/144Nd ratios varied from 0.511841 to 0.511980. The low εNd values and high 87Sr/86Sr ratios in the carbonates may have resulted from the interaction with the hydrothermal fluid derived from the intrusive granite during the Cretaceous Period. Full article
(This article belongs to the Special Issue Rare Earth Elements and Their Isotope Geochemistry)
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16 pages, 3076 KiB  
Article
Petrogenesis of Granitic Rocks in the Hisakajima Island, Goto Archipelago, Southwestern Japan: A Geochemical Study
by Kazuhiro Koga and Motohiro Tsuboi
Minerals 2021, 11(3), 248; https://doi.org/10.3390/min11030248 - 27 Feb 2021
Cited by 1 | Viewed by 2823
Abstract
Whole-rock chemical compositions including rare earth elements for the granitic rocks from the Hisakajima Island, Goto Archipelago, southwestern Japan were measured in order to constrain their origin and petrogenesis. The granites were divided into two types—a granodioritic group (GD) and a high Fe/Mg [...] Read more.
Whole-rock chemical compositions including rare earth elements for the granitic rocks from the Hisakajima Island, Goto Archipelago, southwestern Japan were measured in order to constrain their origin and petrogenesis. The granites were divided into two types—a granodioritic group (GD) and a high Fe/Mg ratio granitic group (HFG). The granitic magma was formed by the upwelling of high-temperature mantle material, which might be related to the extension of the Japan Sea around the Middle Miocene. The origin of the GD magma was attributed to the mantle material, while the origin of the HFG magma was attributed to partial melting of the crust by upwelling of the high-temperature mantle. The amount of rare earth elements revealed the secondary addition of light rare earth elements through hydrothermal processes for the granites. Chondrite normalized rare earth element patterns revealed that the HFG rocks were not well differentiated. Full article
(This article belongs to the Special Issue Rare Earth Elements and Their Isotope Geochemistry)
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18 pages, 13844 KiB  
Article
Rare Earth Elements and Sr Isotope Ratios of Large Apatite Crystals in Ghareh Bagh Mica Mine, NW Iran: Tracing for Petrogenesis and Mineralization
by Narges Daneshvar, Hossein Azizi, Yoshihiro Asahara, Motohiro Tsuboi and Mahdi Hosseini
Minerals 2020, 10(9), 833; https://doi.org/10.3390/min10090833 - 22 Sep 2020
Cited by 3 | Viewed by 4522
Abstract
The 320 Ma Ghareh Bagh mica mine is the only active mica mine in northwest Iran, and hosts Mg-bearing biotite (phlogopite) with apatite, epidote, and calcite. Chemical investigation of apatite infers the high abundances of the rare earth elements (REEs up to 5619 [...] Read more.
The 320 Ma Ghareh Bagh mica mine is the only active mica mine in northwest Iran, and hosts Mg-bearing biotite (phlogopite) with apatite, epidote, and calcite. Chemical investigation of apatite infers the high abundances of the rare earth elements (REEs up to 5619 ppm), higher ratios of the LREE/HREE ((La/Yb)N = 28.5–36.7)) and high content of Y (236–497 ppm). REE pattern in the apatite and host A-type granite is almost the same. Ghareh Bagh apatite formed from the early magmatic-hydrothermal exsolved fluids at the high temperature from the Ghushchi alkali feldspar granite. The apatite crystals came up as suspension grains and precipitated in the brecciated zone. The early magmatic-hydrothermal fluids settle phlogopite, epidote, chlorite, K-feldspar and albite down in the brecciation zone. Due to the precipitation of these minerals, the late-stage fluids with low contents of Na+, Ca2+ and REE affected the early stage of alteration minerals. The high ratios of 87Sr/86Sr (0.70917 to 0.70950) are more consistent with crustal sources for the apatite large crystals. The same ages (320 Ma) for both brecciated mica veins and host alkali feldspar granites infer the apatite and paragenesis minerals were related to host granite A-type granite in the Ghareh Bagh area. Full article
(This article belongs to the Special Issue Rare Earth Elements and Their Isotope Geochemistry)
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