In situ U–Pb isotopic dating of columbite–tantalite by LA–ICP–MS

Dong, Xiaohong; Wu, Fu Yuan; Wang, Ru Cheng; Gerdes, Axel; Ji, Wei Qiang; Zhi-qiang, Zhao; Yang, Jin‐Hui; Zhu, Ze Ying

doi:10.1016/j.oregeorev.2014.07.008

Cited by 135 publications

(84 citation statements)

References 40 publications

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“…Numerous radio‐isotopic methods have been used widely to date mineralisation processes including K (Ar)‐Ar, Rb‐Sr, Sm‐Nd, Lu‐Hf, Re‐Os and U‐Pb techniques. Successful attempts have been reported previously [e.g., Che et al (, Re‐Os dating of molybdenite, U‐Pb dating of columbite–tantalite), Romer and Luders (, U‐Pb dating of columbite), Gulson and Jones (, cassiterite), Anglin et al (, Sm‐Nd dating of scheelite) and Nakai et al (, Rb‐Sr dating of sphalerite)). Among them, the U‐Pb method has been generally considered as the most powerful technique to obtain precise and accurate ages because of the two independent decay schemes and their concordance.…”

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confidence: 99%

In SituU‐Th‐Pb Dating and Sr‐Nd Isotope Analysis of Bastnäsite by LA‐(MC)‐ICP‐MS

Yang

et al. 2019

Geostandard Geoanalytic Res

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Bastnäsite is the end member of a large group of carbonate–fluoride minerals with the common formula (REE) CO3F·CaCO3. This group is generally widespread and, despite never occurring in large quantities, represents the major economic light rare earth element (LREE) mineral in deposits related to carbonatite and alkaline intrusions. Since bastnäsite is easily altered and commonly contains inclusions of earlier‐crystallised minerals, in situ analysis is considered the most suitable method to measure its U‐Th‐Pb and Sr‐Nd isotopic compositions. Electron probe microanalysis and laser ablation (multi‐collector) inductively coupled plasma‐mass spectrometry of forty‐six bastnäsite samples from LREE deposits in China, Pakistan, Sweden, Mongolia, USA, Malawi and Madagascar indicate that this mineral typically has high Th and LREE and moderate U and Sr contents. Analysis of an in‐house bastnäsite reference material (K‐9) demonstrated that precise and accurate U‐Th‐Pb ages could be obtained after common Pb correction. Moreover, the Th‐Pb age with its high precision is preferable to the U‐Pb age because most bastnäsites have relatively high Th rather than U contents. These results will have significant implications for understanding the genesis of endogenous ore deposits and formation processes related to metallogenic geochronology research.

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confidence: 99%

In SituU‐Th‐Pb Dating and Sr‐Nd Isotope Analysis of Bastnäsite by LA‐(MC)‐ICP‐MS

Yang

et al. 2019

Geostandard Geoanalytic Res

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“…Trace element compositions were also calculated by GLITTER 4.0, with 55 Mn as the internal standard and NIST as an external reference material. The detailed analytical technique was described by Che et al (2015). The LA-ICP-MS U-Pb data for Coltan 139 and columbite-(Mn) are presented in Supplementary Table 7.…”

Section: Sample Preparationmentioning

confidence: 99%

Direct evidence for the source of uranium in the Baiyanghe deposit from accessory mineral alteration in the Yangzhuang granite porphyry, Xinjiang Province, northwest China

Zhang

Guo

et al. 2020

American Mineralogist

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Circumstantial evidence for the sources of uranium in ore deposits may be drawn from the study of deposit geochemistry and mineralogy. However, direct evidence supporting uranium leaching from source rocks has rarely been found. This study investigates the source of uranium in the Baiyanghe deposit in the Xiemisitai Mountains, NW China. The main uranium ore bodies occur as fracture-fillings along contact zones between the Yangzhuang granite porphyry and the Devonian volcanic rocks. Zircon, thorite, columbite-(Mn), and bastnäsite are the dominant accessory minerals that host uranium in the granite porphyry. In situ columbite-(Mn) LA-ICP-MS U-Pb dating yields a weighted mean 206 Pb/ 238 U age of 310  4 Ma, suggesting that the Yangzhuang granite porphyry was emplaced during the Late Carboniferous. Back-scattered electron (BSE) images reveal that various degrees of alteration of these same accessory minerals may be observed in the granite porphyry, and the altered domains of these minerals have lower BSE intensities compared to the unaltered domains. Results indicate that the altered domains of zircon grains have lower concentrations of Zr, Si, and U, and higher concentrations of Y, Fe, Ca, and P relative to the unaltered domains, and the altered domains of columbite-(Mn) grains are enriched in Ti and Fe, and are depleted in Nb, Ta, Mn, U, and Zr. The altered domains of thorite grains have higher concentrations of Zr, Fe, Ca, Nb, and P, and lower Th and U compared to those of the relict domains. The This is a preprint, the final version is subject to change, of the American Mineralogist (MSA) Cite as Authors (Year) Title. American Mineralogist, in press.

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“…In addition to the minerals outlined above, baddeleyite, allanite, perovskite, eudialyte, xenotime, zirconolite, loparite, columbite-tantalite, bastnaesite, calzirtite, schorlomite, andradite-rich garnet and cassiterite have either been utilized in U-Pb geochronology and/or LASS isotopic analysis, or are potential candidate minerals, although in many cases, matrix matched standards are scarce or not yet available. Example reference materials include Phalaborwa and SK10-2 for baddeleyite, 9,175 EM-1 and LE40010 for allanite, 176,177 AFK for perovskite, 178 LV01 for eudialyte, 179 MG-1 and BS-1 for xenotime, 180 ZrKA for zirconolite (calzirtite), 181 LOP01 for loparite, 182 coltan 139 for columbite, 183 and K-9 for bastnaesite. 10,184,185 Zr-bearing minerals like eudialyte, zirconolite and calziritite are ideally suited for U-Th-Pb dating and Nd-Hf-(Sr) isotopic analysis by LA-(MC)-ICP-MS. Eudialyte, one of a group of complex Na-Ca zirconosilicate minerals that generally occur in peralkaline agpaitic syenites, is the only mineral investigated to date for which it is possible to simultaneously determine U-Pb ages and Sr, Nd and Hf isotopic compositions.…”

Section: Minerals Utilized For U-th-pb Dating and Lassmentioning

confidence: 99%

“…Columbite-tantalite (coltan) is characterized by high U and low common Pb contents, making it an ideal mineral for U-Pb isotopic dating of Nb-Ta mineralization. Che et al (2015) 183 used a coltan U-Pb dating method to date the Nanping pegmatite (NP155), an important Nb-Ta deposit in China.…”

Section: Minerals Utilized For U-th-pb Dating and Lassmentioning

confidence: 99%

U–Th–Pb geochronology and simultaneous analysis of multiple isotope systems in geological samples by LA-MC-ICP-MS

Xie

Evans

Yang

et al. 2018

J. Anal. At. Spectrom.

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In situ U–Pb isotopic dating of columbite–tantalite by LA–ICP–MS

Cited by 135 publications

References 40 publications

In SituU‐Th‐Pb Dating and Sr‐Nd Isotope Analysis of Bastnäsite by LA‐(MC)‐ICP‐MS

In SituU‐Th‐Pb Dating and Sr‐Nd Isotope Analysis of Bastnäsite by LA‐(MC)‐ICP‐MS

Direct evidence for the source of uranium in the Baiyanghe deposit from accessory mineral alteration in the Yangzhuang granite porphyry, Xinjiang Province, northwest China

U–Th–Pb geochronology and simultaneous analysis of multiple isotope systems in geological samples by LA-MC-ICP-MS

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