Quadrupole LA-ICP-MS U/Pb geochronology of baddeleyite single crystals

Autor:	Mimmi K.M. Nilsson, Cora C. Wohlgemuth-Ueberwasser, Ulf Söderlund, Victoria Pease
Rok vydání:	2015
Předmět:	Matrix (chemical analysis) La icp ms Geochronology Quadrupole Geovetenskap och miljövetenskap Mineralogy Earth and Related Environmental Sciences Spectroscopy Geology Analytical Chemistry Baddeleyite
Zdroj:	Journal of Analytical Atomic Spectrometry
ISSN:	1364-5544 0267-9477
Popis:	We present a straightforward method for accurate and precise U/Pb dating of baddeleyite using quadrupole LA-ICP-MS. To establish the validity of our ICP-MS data we used FC-4b baddeleyite from the Duluth complex as external standard, whereas baddeleyite from the Phalaborwa (South Africa) and the Sorkka (SW Finland) intrusions were treated as unknowns. The analytical protocol includes the use of a matrix matched standard, which allows for an accurate downhole-fractionation and laser-induced interelement fractionation correction. The quadrupole ICP-MS results for the Phalaborwa and Sorkka samples analyzed are accurate within error of the published ID-TIMS U/Pb ages and with a precision of 0.3–0.7% (2σ) from concordia ages of ten to twenty analyses per sample. No orientation effects were observed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b3d637cecbd61ac0b18fcfd4a84e6b3 https://doi.org/10.1039/c4ja00400k Zobrazit plný text záznamu