In-situ U-Pb dating of uraninite by fs-LA-ICP-MS

Zong, Keqing; Chen, Jinyong; Hu, Zhaochu; Liu, Yongsheng; Li, Ming; Fan, Honghai; Meng, Yue

doi:10.1007/s11430-015-5154-y

Cited by 45 publications

(17 citation statements)

References 51 publications

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“…The 100% normalization calibration is summed up as Equation (5) according to Liu et al (2008). This method has been used to analyze the major and trace elements of silicate glasses (Guillong et al, 2005;Halicz and Günther, 2004;Liu et al, 2008), silicate minerals (He et al, 2013;Hu et al, 2008a;Liu et al, 2008;Liu et al, 2010b), carbonate minerals , silicate whole-rocks (Li et al, 2011a;Zhu et al, 2013) and metal oxides Zong et al, 2015).…”

Section: The Sum Normalization Calibration Methodsmentioning

confidence: 99%

Calibration and correction of LA-ICP-MS and LA-MC-ICP-MS analyses for element contents and isotopic ratios

Lin

Liu

Yang

et al. 2016

Solid Earth Sciences

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260

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LA-ICP-MS and LA-MC-ICP-MS have been the techniques of choice for achieving accurate and precise element content and isotopic ratio, the state-of-the-art technique combines the advantages of low detection limits with high spatial resolution, however, the analysis accuracy and precision are restricted by many factors, such as sensitivity drift, elemental/isotopic fractionation, matrix effects, interferences and the lack of sufficiently matrix-matched reference materials. Thus, rigorous and suitable calibration and correction methods are needed to obtain quantitative data. This review systematically summarized and evaluated the interference correction, quantitative calculation and sensitivity correction strategies in order to provide the analysts with suitable calibration and correction strategies according to the sample types and the analyzed elements. The functions and features of data reduction software ICPMSDataCal were also outlined, which can provide real-time and on-line data reduction of element content and isotopic ratios analyzed by LA-ICP-MS and LA-MC-ICP-MS.

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Section: The Sum Normalization Calibration Methodsmentioning

confidence: 99%

Calibration and correction of LA-ICP-MS and LA-MC-ICP-MS analyses for element contents and isotopic ratios

Lin

Liu

Yang

et al. 2016

Solid Earth Sciences

Self Cite

260

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“…A series of different analytical methods can be used to determine the age of the uranium mineralization. For instance, ID-TIMS method can provide high precision and accuracy U-Pb isotopic ratios of uraninite, but it is unavoidable that the resultant age usually overprints the multistage uranium mineralization due to the presence of U and/or Pb-rich mineral inclusions [29,30]. U-Pb ages of magmatic zircon may constrain the emplacement age of the host pegmatite but cannot be directly considered as the crystallization age of the uranium mineralization.…”

Section: Introductionmentioning

confidence: 99%

SIMS U-Pb Dating of Uraninite from the Guangshigou Uranium Deposit: Constraints on the Paleozoic Pegmatite-Type Uranium Mineralization in North Qinling Orogen, China

et al. 2021

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Pegmatite-type uranium mineralization occurs in the Shangdan domain of the North Qinling Orogenic Belt, representing a significant uraniferous province. The Guangshigou deposit is the largest U deposit of the district. Within the North Qinling area, a series of Caledonian granitic igneous rocks intruded the Proterozoic metamorphic rocks of the Qinling Group in two magmatic stages: (i) the Early Silurian Huichizi granite that was derived from a low degree of partial melting of thickened lower basaltic crust combined with mantle-derived materials following the subduction of the Shangdan Ocean; and (ii) the Late Silurian–Early Devonian Damaogou granite and associated pegmatites derived from the same source but emplaced in a late tectonic post-collisional extension environment. In the Guangshigou deposit, the U mineralization mainly occurs as uraninite disseminated in U-rich granitic biotite pegmatites, which formed by assimilation-fractional crystallization magmatic processes. Petrographic observations showed evidence for coeval crystallization of uraninite and other rock-forming minerals of the host pegmatite including quartz, feldspar, biotite, zircon, monazite, apatite, and xenotime. In addition, the low U/Th ratios (~19) and Th, REE, and Y enrichments characterized a magmatic origin for uraninite, which was likely derived from fractionated high-K calc-alkaline pegmatitic magma that experienced various degrees of crustal material contamination. In situ U-Pb isotopic dating performed by Secondary-Ion Mass Spectrometry (SIMS) on uraninite from the Guangshigou deposit yielded a crystallization age of 412 ± 3 Ma, which is concomitant (within errors) with the emplacement age of the host pegmatite (415 ± 2 Ma) and constrained the U ore genesis to the Early Devonian, which corresponds to the late Caledonian post-collisional extension in the North Qinling area. Uraninite then experienced various degrees of metamictization and/or post-Caledonian hydrothermal alteration characterized by an alteration rim associated with coffinite, chlorite and limonite. Finally, the characteristics of the pegmatite-related Guangshigou deposit exhibiting Th-rich uraninite which was the product of assimilation-fractional crystallization of pegmatitic magma defined a model significantly different than the one established for the world-class Rössing deposit characterized by Th-poor uraninite hosted in alaskite dykes formed by low degree of partial melting of U-rich metasediments.

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“…Investigating the geochronological history of uraninite is important to understand how uranium deposits form and develop over time. Several previous studies have adopted U-Pb age dating techniques applied to uraninite in order to unravel the complex formational history of uranium deposits (e.g., [13,14]). Application of the U-Pb geochronometer for uraninite dating does pose some important challenges that are associated with the potential loss or gain of Pb or U.…”

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The Role of Continental Crust in the Formation of Uraninite-Based Ore Deposits

et al. 2020

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This study reports trace element abundances and Pb, Sr, and U isotopic signatures of uraninite from a variety of ore deposits in order to establish baseline forensic information for source attribution of raw, natural U-rich samples. Trace element concentrations, reported here, provide insights into uraninite crystal substitution mechanisms and possible crustal sources of U, including mobility of trace elements between pristine versus altered fractions. Spatially resolved laser ablation (LA) multicollector (MC) inductively coupled plasma mass spectrometry (ICP-MS) analyses were used to determine secondary 207Pb-206Pb isochron ages, and these were validated by corroborative results obtained by solution mode (SM) MC-ICP-MS for the same sample. Secondary Pb-Pb isochron ages obtained, in this study, indicate that uraninite alteration occurs shortly after ore mineralization. Initial 87Sr/86Sr values correlate in general with host craton age, and therefore suggest that uraninite ore formation is closely linked to the nature of the bedrock geology. The δ238U values are explained by invoking multiple physicochemical conditions and parameters such as temperature, nuclear field shift, oxidation, and source rock composition. The δ234U values indicate that the uraninites, investigated here, have undergone recent alteration, but the latter has not perturbed the Pb-Pb secondary isochron ages.

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In-situ U-Pb dating of uraninite by fs-LA-ICP-MS

Cited by 45 publications

References 51 publications

Calibration and correction of LA-ICP-MS and LA-MC-ICP-MS analyses for element contents and isotopic ratios

Calibration and correction of LA-ICP-MS and LA-MC-ICP-MS analyses for element contents and isotopic ratios

SIMS U-Pb Dating of Uraninite from the Guangshigou Uranium Deposit: Constraints on the Paleozoic Pegmatite-Type Uranium Mineralization in North Qinling Orogen, China

The Role of Continental Crust in the Formation of Uraninite-Based Ore Deposits

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