A straightforward protocol for Hf purification by single step anion-exchange chromatography and isotopic analysis by MC-ICP-MS applied to geological reference materials and zircon standards
MetadataShow full item record
A straightforward one-step Hf purification protocol for geological samples using common anionexchangechromatography and isotopic measurements by multiple collector inductively coupled plasma mass spectrometry (MC-ICP-MS) is described in this paper. The sample is dissolved in concentrated HF–HNO3 mixtures with round-bottom SavillexTM Teflon screw-top capsules or high-pressure stainlesssteel jacketed Teflon bombs. After complete dissolution, the chemical separation between Hf and isobarically interfering elements such as Lu, Yb, and matrix elements like Ti, is performed and achievedsimultaneously using a common one-step anion exchange resin (AG1-X8). The Hf yields are >90% andtotal procedural blanks are lower than 20 pg. This protocol not only avoids using multiple-stage ionexchange resins, but also eliminates perchloric acid to break down fluorides after HF treatment of thesample. In addition to whole rock, this protocol is also practical for zircon and baddeleyite Hf purificationprior to isotopic measurement. New Hf isotopic data for zircon 91500, Temora, CN92-1 and FM0411,together with Phalaborwa baddeleyite are presented for this method. Multiple analyses of the international geological reference materials and standard zircon and baddeleyite used in U–Pb geochronology demonstrate that this method is simple, economic, efficient and reproducible.
Showing items related by title, author, creator and subject.
Zircon U-Pb ages and Lu-Hf isotopes of Paleoproterozoic metasedimentary rocks in the Korla Complex, NW China: Implications for metamorphic zircon formation and geological evolution of the Tarim CratonGe, Rongfeng; Zhu, W.; Wu, H.; He, J.; Zheng, B. (2013)Widespread Paleoproterozoic supracrustal rocks in the northern Tarim Craton contain important information about its geological evolution and correlation with adjacent blocks. We present new in situ LA-(MC-)ICP-MS zircon ...
Nanogeochronology of discordant zircon measured by atom probe microscopy of Pb-enriched dislocation loopsPeterman, E.; Reddy, Steven; Saxey, David; Snoeyenbos, D.; Rickard, William; Fougerouse, Denis; Kylander-Clark, A. (2016)Isotopic discordance is a common feature in zircon that can lead to an erroneous age determination, and it is attributed to the mobilization and escape of radiogenic Pb during its post-crystallization geological evolution. ...
Detrital zircon U–Pb age and Hf isotope constrains on the generation and reworking of Precambrian continental crust in the Cathaysia Block, South China: A synthesisLi, X.; Li, Zheng-Xiang; Li, W. (2014)The South China Block, consisting of the Yangtze and the Cathaysia blocks, is one of the largest Precambrian blocks in eastern Asia. However, the early history of the Cathaysia Block is poorly understood due largely to ...