Articles | Volume 2, issue 2
Geochronology, 2, 187–208, 2020
https://doi.org/10.5194/gchron-2-187-2020
Geochronology, 2, 187–208, 2020
https://doi.org/10.5194/gchron-2-187-2020

Research article 08 Jul 2020

Research article | 08 Jul 2020

Multimethod U–Pb baddeleyite dating: insights from the Spread Eagle Intrusive Complex and Cape St. Mary's sills, Newfoundland, Canada

Johannes E. Pohlner et al.

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Cited articles

Amelin, Y. and Zaitsev, A. N.: Precise geochronology of phoscorites and carbonatites: The critical role of U-series disequilibrium in age interpretations, Geochim. Cosmochim. Ac., 66, 2399–2419, 2002. 
Anthony, J. W., Bideaux, R. A., Bladh, K. W., and Nichols, M. C. (Eds.): Handbook of Mineralogy. Mineralogical Society of America, Chantilly, VA 20151-1110, USA, 2001. 
Aranovich, L. Y., Zinger, T. F., Bortnikov, N. S., Sharkov, E. V., and Antonov, A. V.: Zircon in gabbroids from the axial zone of the Mid-Atlantic Ridge, Markov Deep, 6 N: correlation of geochemical features with petrogenetic processes, Petrology, 21, 1–15, 2013. 
Austermann, G.: Sedimentology and depositional environment of the middle Cambrian Manuels River Formation in the type locality at Conception Bay South, Newfoundland, Canada, Unpublished PhD thesis, Heidelberg University, 356 pp., 2016. 
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Short summary
Baddeleyite is commonly used for U–Pb dating, but textural complexities, alteration features and discordance often make age interpretation difficult. Based on this case study, we discuss strategies for obtaining more accurate baddeleyite ages by high-precision and high spatial resolution methods, including analytical challenges and discordance interpretation. An evaluation of microtextures allows us to distinguish among seven different types of baddeleyite–zircon intergrowths.