scispace - formally typeset
Search or ask a question
Author

Yong-Fei Zheng

Bio: Yong-Fei Zheng is an academic researcher from University of Science and Technology of China. The author has contributed to research in topics: Zircon & Metamorphism. The author has an hindex of 86, co-authored 354 publications receiving 25033 citations. Previous affiliations of Yong-Fei Zheng include University of Göttingen & Center for Excellence in Education.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the results from a second characterisation of the 91500 zircon, including data from electron probe microanalysis, laser ablation inductively coupled plasma-mass spectrometer (LA-ICP-MS), secondary ion mass spectrometry (SIMS), and laser fluorination analyses, were reported.
Abstract: This paper reports the results from a second characterisation of the 91500 zircon, including data from electron probe microanalysis, laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS), secondary ion mass spectrometry (SIMS) and laser fluorination analyses. The focus of this initiative was to establish the suitability of this large single zircon crystal for calibrating in situ analyses of the rare earth elements and oxygen isotopes, as well as to provide working values for key geochemical systems. In addition to extensive testing of the chemical and structural homogeneity of this sample, the occurrence of banding in 91500 in both backscattered electron and cathodoluminescence images is described in detail. Blind intercomparison data reported by both LA-ICP-MS and SIMS laboratories indicate that only small systematic differences exist between the data sets provided by these two techniques. Furthermore, the use of NIST SRM 610 glass as the calibrant for SIMS analyses was found to introduce little or no systematic error into the results for zircon. Based on both laser fluorination and SIMS data, zircon 91500 seems to be very well suited for calibrating in situ oxygen isotopic analyses.

1,131 citations

Journal ArticleDOI
TL;DR: In this article, three methods have been proposed to link zircon U-Pb age to metamorphic conditions: (i) internal structure; (ii) trace element feature; (iii) mineral inclusion composition.
Abstract: Zircon U-Pb dating is the most commonly used method for isotopic geochronology. However, it has been a difficult issue when relating zircon U-Pb ages to metamorphic conditions in complex metamorphic rocks. Much progress has been made in the past decade with respect to the genesis of zircon and its constraints on interpretation of U-Pb age. Three methods have been proposed to link zircon U-Pb age to metamorphic conditions: (i) internal structure; (ii) trace element feature; (iii) mineral inclusion composition. Magmatic zircon shows typical oscillatory zoning and/or sector zoning, whereas metamorphic zircon has internal structures such as no zoned, weakly zoned, cloudy zoned, sector zoned, planar zoned, and patched zoned ones. Zircons formed in different geological environments generally have characteristic internal structures. Magmatic zircons from different rock types have variable trace element abundances, with a general trend of increasing trace element abundances in zircons from ultramafic through mafic to granitic rocks. Zircons formed under different metamorphic conditions have different trace element characteristics that can be used to relate their formation to metamorphic conditions. It is an effective way to relate zircon growth to certain P-T conditions by studying the trace element partitioning between coexisting metamorphic zircon and garnet in high-grade metamorphic rocks containing both zircon and garnet. Primary mineral inclusions in zircon can also provide unambiguous constraints on its formation conditions. Therefore, interpretation of zircon U-Pb ages can be constrained by its internal structure, trace element composition, mineral inclusion and so on.

900 citations

Journal ArticleDOI
TL;DR: In this article, a fried ice cream model was proposed to explain the rapid processes of both plate subduction and exhumation, with a short residence time of the UHP slab at mantle depths.

767 citations

Journal ArticleDOI
TL;DR: In this paper, a new nouveau materiel de reference potentiel -des megacristaux de zircon naturel provenant d'un basalte alcalin du debut du pliocene (region de Pengiai, nord de l'ile de Hainan, Chine meridionale) destine a l'analyse microfaisceaux des isotopes of l'O and de lhf, and the datation U-Pb.
Abstract: Nous proposons un nouveau materiel de reference potentiel - des megacristaux de zircon naturel provenant d'un basalte alcalin du debut du pliocene (region de Pengiai, nord de l'ile de Hainan, Chine meridionale) destine a l'analyse microfaisceaux des isotopes de l'O et de l'Hf, et la datation U-Pb. Les megacristaux de zircon de Penglai se sont reveles, apres un grand nombre de mesures par LA-MC-ICP-MS et SIMS, assez homogenes en terme d'isotopes de l'O et de l'Hf. Les determinations precises des isotopes de l'O par IRMS et des isotopes de l'Hf par MC-ICP-MS solution sont en bon accord avec la moyenne statistique des analyses microfaisceaux. La valeur moyenne δ 18 O de 5.31 ± 0.10‰ (2s) par IRMS et la valeur moyenne 176 Hf/ 177 Hf de 0.282906 ± 0.0000010 (2s) par solution MC-ICP-MS sont les meilleures valeurs de reference pour les zircons de Penglai. Les mesures SIMS ainsi que celles par dilution isotopique-TIMS donnent, compte tenu des incertitudes analytiques, des âges 206 Pb/ 238 U conformes, et l'âge prefere 206 Pb/ 238 U est estime a 4.4 ± 0.10 Ma (intervalle de confiance de 95%). Leur jeune âge et leurs teneurs variables et elevees en Pb commun font que les zircons de Penglai ne sont pas utilisables comme materiel de reference primaire pour l'etalonnage d'echantillons inconnus dont les âges U-Pb doivent etre determines par analyses microfaisceaux; Toutefois, ils peuvent etre utilises comme materiel de reference secondaire pour le controle qualite de la determination de l'âge U-Pb des zircons jeunes (en particulier pour ceux < 10 Ma).

749 citations

Journal ArticleDOI
TL;DR: In this article, the modified increment method has been applied to the calculation of oxygen isotope fractionation factors for hydroxyl-bearing silicate minerals, which can be used as a test of isotopic equilibrium or disequilibrium in natural mineral assemblages over all temperature ranges.

672 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: In this article, the first finding of continental crust-derived Precambrian zircons in garnet/spinel pyroxenite veins within mantle xenoliths carried by the Neogene Hannuoba basalt in the central zone of the North China Craton (NCC).
Abstract: We present the first finding of continental crust-derived Precambrian zircons in garnet/spinel pyroxenite veins within mantle xenoliths carried by the Neogene Hannuoba basalt in the central zone of the North China Craton (NCC). Petrological and geochemical features indicate that these mantle-derived composite xenoliths were formed by silicic melt^lherzolite interaction. The Precambrian zircon ages can be classified into three age groups of 2·4^2·5 Ga, 1·6^2·2 Ga and 0·6^1·2 Ga, coinciding with major geological events in the NCC. These Precambrian zircons fall in the field of continental granitoid rocks in plots of U/Yb vs Hf and Y. Their igneous-type REE patterns and metamorphic zircon type CL images indicate that they were not crystallized during melt^peridotite interaction and subsequent high-pressure metamorphism.The 2·5 Ga zircons have positive eHf(t) values (2·9^10·6), whereas the younger Precambrian zircons are dominated by negative eHf(t) values, indicating an ancient continental crustal origin.These observations suggest that the Precambrian zircons were xenocrysts that survived melting of recycled continental crustal rocks and were then injected with silicate melt into the host peridotite. In addition to the Precambrian zircons, igneous zircons of 315 3 Ma (2 ), 80^170 Ma and 48^64 Ma were separated from the garnet/spinel pyroxenite veins; these provide evidence for lower continental crust and oceanic crust recycling-induced multi-episodic melt^peridotite interactions in the central zone of the NCC. The combination of the positive eHf(t) values (2·91^24·6) of the 315 Ma zircons with the rare occurrence of 302^324 Ma subduction-related diorite^granite plutons in the northern margin of the NCC implies that the 315 Ma igneous zircons might record melt^peridotite interactions in the lithospheric mantle induced by Palaeo-Asian oceanic crust subduction. Igneous zircons of age 80^170 Ma generally coexist with the Precambrian metamorphic zircons and have lower Ce/Yb and Th/U ratios, higher U/Yb ratios and greater negative Eu anomalies.The eHf(t) values of these zircons vary greatly from ^47·6 to 24·6.The 170^110 Ma zircons are generally characterized by negative eHf(t) values, whereas the 110^100 Ma zircons have positive eHf(t) values.These observations suggest that melt^peridotite interactions at 80^170 Ma were induced by partial melting of recycled continental crust. The 48^64 Ma igneous zircons are characterized by negligible Ce anomalies, unusually high REE, U and Th contents, and positive eHf(t) values.These features imply that the melt^peridotite interactions at 48^64 Ma could be associated with a depleted mantle-derived carbonate melt or fluid.

2,753 citations

Journal ArticleDOI
Fu-Yuan Wu1, Yue-Heng Yang1, Lie-Wen Xie1, Jin-Hui Yang1, Ping Xu1 
TL;DR: In this article, the mean β Yb value of the individual spot and newly published Yb isotopic abundance data, six standard zircons and two standard baddeleyites, have been investigated using a Neptune MC-ICPMS, with 193 mm laser.

2,161 citations

Journal ArticleDOI
TL;DR: In this article, Zhang et al. used zircon U-Pb SHRIMP (5 samples), laser ablation (LA) ICP-MS (22 samples), and TIMS (5 sample) dating to establish that the Early Cretaceous was a significant period of igneous activity in the Liaodong Peninsula, with a duration of about 10 Ma.

1,229 citations

Journal ArticleDOI
TL;DR: In this paper, a protocol was established for simultaneous measurements of zircon U-Pb ages and trace elements by LA-ICP-MS at spot sizes of 16-32?m.
Abstract: A protocol was established for simultaneous measurements of zircon U-Pb ages and trace elements by LA-ICP-MS at spot sizes of 16–32 ?m. This was accomplished by introducing N2 into ICP to increase the sensitivity. The obtained U-Pb ages for zircon standards GJ-1, TEMORA and SK10-2 are consistent with the preferred values within about 1% uncertainty (2 σ ) by simple external calibration against zircon standard 91500. Different data reduction softwares could yield different uncertainties for calculation of U-Pb ages. The commercially available program GLITTER4.4 could apply an improper uncertainty calculation strategy, but it may yield artificial high precisions for single analyses. Our trace element analyses indicate that Si is not an ideal internal standard for zircon when calibrated against the NIST glasses. Calibration against the NIST glasses using Si as an internal standard, a systematic deviation of 10%–30% was found for most trace elements including Zr. However, the trace element compositions of zircon can be accurately measured by calibration against multiple reference materials with natural compositions (e.g., BCR-2G, BHVO-2G and BIR-1G), or calibration against NIST SRM 610 and using Zr as an internal standard. Analyses of two pieces of GJ-1 demonstrate that it is relatively homogenous for most trace elements (except for Ti).

1,227 citations