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Matrix effects during in situ U-Pb dating of perovskite with variable crystal structure: Evidence from the Tazheran Massif, Russia
Sun, Jing1,2; Wu, Fu-Yuan3; Sklyarov, Eugene4,5; Sarkar, Chiranjeeb6; Liu, Chuan-Zhou3; Pearson, Graham D.6; Cheng, Zhe2; Mitchell, Ross N.3
2022-02-05
Source PublicationCHEMICAL GEOLOGY
ISSN0009-2541
Volume589Pages:13
AbstractU-Pb geochronology of perovskite is one of the most reliable means of dating notoriously difficult to date and economically important kimberlites, carbonatites, and skarns. Matrix effects-isotopic variations due to chemical composition and crystal structure-are known to affect in situ U-Pb dating, but have not been documented in perovskite. Perovskite from the Tazheran Massif, Russia, has become a commonly used standard for U-Pb dating, so rigorously testing its general applicability is therefore critical. In this study, comparison between U-Pb ages generated by precise isotope dilution-thermal ionization mass spectrometry (ID-TIMS) and in situ dating methods including both secondary ion mass spectrometry (SIMS) and laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) for a series of perovskite crystals from the Tazheran Massif (Tazh-1, Tazh-2, Tazh-3, Tazh-7B1, and Tazh-7Br) suggests that the in situ ages of some perovskite crystals (Tazh-1, Tazh-7B1, and Tazh-7Br) are systematically offset from their corresponding ID-TIMS ages. Hence, not all Tazheran perovskite grains are suitable as standards and some previously published work may suffer from unrecognized inaccuracies. Various factors are investigated in an attempt to identify the origin(s) of the matrix effect biasing the in situ measurements. Although there are so far only a limited number of perovskite grains analyzed by all SIMS, LA-ICPMS, and TIMS methods, grains Tazh-1, Tazh-7B1, and Tazh-7Br all have extremely low FeO, Nb, and LREE contents compared with the other Tazh perovskite and well characterized reference materials (AFK-5 and Ice River), indicating that such chemical variability may cause analytical differences. Furthermore, and perhaps more importantly, the Tazh-1, Tazh-7Bl, and Tazh-7Br perovskite grains are cubic and thus have different crystal structure from most Tazh perovskite and their standards that are orthorhombic. Therefore, crystal structure could be the principal reason for the matrix effect, with secondary matrix effects due to differences in chemical composition, that need to be taken into account in future in situ U-Pb dating of perovskite.
KeywordMatrix effects In situ dating Perovskite Tazheran Massif Crystal structure
DOI10.1016/j.chemgeo.2021.120685
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordLA-ICP-MS ; KIMBERLITE MAGMATISM ; TRACE-ELEMENT ; ULTRAMAFIC LAMPROPHYRES ; AGE-DETERMINATION ; SOMERSET ISLAND ; KOLA-PENINSULA ; X-RAY ; GEOCHRONOLOGY ; ZIRCON
Language英语
Funding ProjectNational Natural Science Foundation of China[42072060]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000768006500005
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105007
Collection岩石圈演化国家重点实验室
Corresponding AuthorSun, Jing
Affiliation1.China Univ Petr, State Key Lab Petr Resources & Engn, Beijing 102249, Peoples R China
2.China Univ Petr, Coll Geosci, Beijing 102249, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Russian Acad Sci, Inst Earths Crust, Siberian Branch, Irkutsk 664033, Russia
5.Far East Fed Univ, Sch Engn, Vladivostok 690091, Russia
6.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB, Canada
Recommended Citation
GB/T 7714
Sun, Jing,Wu, Fu-Yuan,Sklyarov, Eugene,et al. Matrix effects during in situ U-Pb dating of perovskite with variable crystal structure: Evidence from the Tazheran Massif, Russia[J]. CHEMICAL GEOLOGY,2022,589:13.
APA Sun, Jing.,Wu, Fu-Yuan.,Sklyarov, Eugene.,Sarkar, Chiranjeeb.,Liu, Chuan-Zhou.,...&Mitchell, Ross N..(2022).Matrix effects during in situ U-Pb dating of perovskite with variable crystal structure: Evidence from the Tazheran Massif, Russia.CHEMICAL GEOLOGY,589,13.
MLA Sun, Jing,et al."Matrix effects during in situ U-Pb dating of perovskite with variable crystal structure: Evidence from the Tazheran Massif, Russia".CHEMICAL GEOLOGY 589(2022):13.
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