Laser ablation zircon dating

19.04.2017

laser ablation zircon dating

A working reference for microbeam analysis of U-Pb age and Hf and O isotopes. Ion-microprobe analysis only sputters a small volume from the abraded mineral surface and dates what you can see. We provide examples of complex ablatjon zircon from a southern Indian granulite terrane where SHRIMP II and LA-ICP-MS analyses are compared. Uncertainty produced during LA-ICPMS zircon U-Pb analyses comes from multiple sources, including uncertainty in the isotopic ratio measurements, uncertainty zircn the fractionation factor calculation using an external standard, uncertainty in the age determination as a result of common lead correction, age uncertainty of the external standards and uncertainty in the data reduction. Li X Laser ablation zircon dating, Liang X, Sun M, et al. Geostand Geoanal Res, Williams I S, Hergt J M. Deposition and elemental fractionation processes during atmospheric pressure laser sampling for analysis by ICPMS. XX is the XXth reference in the list of references. Correction of common lead in U-Pb analyses that datinh not report Pb. Not logged in Not affiliated In this study, 45 LAM—ICP—MS analyses were carried daring on 35 crystals kaser zircon. The SHRIMP data are shown to be more precise and reliable, and we caution laser ablation zircon dating the use of LA-ICP-MS in deciphering the chronology of complex zircons from high-grade terranes. Although complex Pb-loss is also recorded in portions of the allanite crystals analyzed, no evidence of inheritance was recorded. Monazite and xenotime U-Th-Pb geochronology by ion microprobe: Production and hosting by Elsevier B. This study reports U—Pb geochronological data for zircon obtained by laser ablation-multi-collector-ICP-MS using a new collector block design that includes three ion counters and twelve Faraday buckets.

U—Th—Pb geochronology based on data acquired by laser-ablation microprobe — inductively coupled plasma — mass spectrometry LAM—ICP—MS has been applied to in situ dating of allanite and zircon in a single section of the October Harbour granite, Labrador. This is the first report of Th—Pb dating of allanite by the LAM—ICP—MS method, confirmed by zircon ages from the same section. Zircon crystals were examined using back-scattered electron images to identify features such as inherited cores, overgrowths and oscillatory growth.

In this study, 45 LAM—ICP—MS analyses were carried out on 35 crystals of zircon. The data also indicate — Ma inheritance and patterns of multiple loss of lead in many grains. The allanite occurs as large euhedral crystals; they show elevated U and Th contents. Although complex Laser ablation zircon dating is also recorded in portions of the allanite crystals analyzed, no evidence of inheritance was recorded.

The age of the October Harbour granite is constrained to be ca. The Strawberry suite thus may not be a single ca. School of Earth and Ocean Sciences, University of Victoria, P. BoxVictoria, British Columbia V8W 3P6, Canada. Archive of all content. We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail.

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CoxDerek H. Abstract U—Th—Pb geochronology based on data acquired by laser-ablation microprobe — inductively coupled plasma — mass spectrometry LAM—ICP—MS has been applied to in situ dating of allanite and zircon in a single section of the October Harbour granite, Labrador. Forgot your laser ablation zircon dating name or password? Previous Article Next Article. Previous Issue Next Issue.

Table of Contents Index by author. Search for this keyword. Mineralogical Association of Canada. Volume 54, Number 5. Tweet Widget Facebook Like Google Plus One. LASER-ABLATION U—Th—Pb IN SITU DATING OF ZIRCON AND ALLANITE: AN EXAMPLE FROM THE OCTOBER Laser ablation zircon dating GRANITE, CENTRAL COASTAL LABRADOR, CANADA. The Canadian Mineralogist Apr41 2 ; DOI: Thank you for your interest in spreading the word on The Canadian Mineralogist. You are going to email the following LASER-ABLATION U—Th—Pb IN SITU DATING OF ZIRCON AND ALLANITE: Message Subject Your Name has sent you a message from The Canadian Mineralogist.

Message Body Your Name thought you would like to see the The Canadian Mineralogist web site. Citation Manager Formats BibTeX Bookends EasyBib EndNote tagged EndNote 8 xml Medlars Mendeley Papers RefWorks Tagged Ref Manager RIS Zotero. Add to Selected Citations. View Selected Citations 0. Jump To Top Article Abstract Introduction Background Information Geological Setting LAM—ICP—MS Analysis Sample Descriptions Results From The October Harbor Granite Discussion Conclusions Acknowledgments References.

More in laser ablation zircon dating TOC Section Meierite, A New Barium Mineral With A Kfi-Type Zeolite Framework From the Gun Claim, Yukon Canada. Mineralogy and Metal Zoning of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant Volcanogenic Massive Sulfide VMS Deposit, Newfoundland. Trace Element Distribution Cu, Ga, Ge, Cd, and Fe IN Sphalerite From the Tennessee MVT Deposits, USA, By Combined EMPA, LA-ICP-MS, Raman Spectroscopy, and Crystallography.

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LASER - ABLATION U–Th–Pb IN SITU DATING OF ZIRCON AND ALLANITE: AN EXAMPLE FROM THE OCTOBER HARBOUR GRANITE, CENTRAL COASTAL. Zircon U-Pb ages determined by LA-ICPMS in six laboratories vary from ± to zircon U-Pb dating Laser ablation -inductively coupled plasma mass. In Situ U-Pb Zircon Dating Using Laser. Ablation -Multi Ion Counting-ICP-MS. (LA- MIC-ICP-MS). Claudia Bouman, Johannes Schwieters, Thermo Fisher. Abstract: A robust method for U-Pb dating of zircon by laser ablation ICP-MS was established using a Thermo-Finnigan Element2 sector field ICP-MS coupled to.