Articles | Volume 2, issue 2
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, Axel K. Schmitt, Kevin R. Chamberlain, Joshua H. F. L. Davies, Anne Hildenbrand, and Gregor Austermann

Related authors

Monsoonal forcing of cold-water coral growth off southeastern Brazil during the past 160 kyr
André Bahr, Monika Doubrawa, Jürgen Titschack, Gregor Austermann, Andreas Koutsodendris, Dirk Nürnberg, Ana Luiza Albuquerque, Oliver Friedrich, and Jacek Raddatz
Biogeosciences, 17, 5883–5908,,, 2020
Short summary

Related subject area

Longlived radio-isotope systems
High-precision ID-TIMS cassiterite U–Pb systematics using a low-contamination hydrothermal decomposition: implications for LA-ICP-MS and ore deposit geochronology
Simon Tapster and Joshua W. G. Bright
Geochronology, 2, 425–441,,, 2020
Short summary
Highly accurate dating of micrometre-scale baddeleyite domains through combined focused ion beam extraction and U–Pb thermal ionization mass spectrometry (FIB-TIMS)
Lee F. White, Kimberly T. Tait, Sandra L. Kamo, Desmond E. Moser, and James R. Darling
Geochronology, 2, 177–186,,, 2020
Short summary
Stepwise chemical abrasion–isotope dilution–thermal ionization mass spectrometry with trace element analysis of microfractured Hadean zircon
C. Brenhin Keller, Patrick Boehnke, Blair Schoene, and T. Mark Harrison
Geochronology, 1, 85–97,,, 2019
Short summary

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. 
Aranovich, L. Y., Bortnikov, N. S., Zinger, T. F., Borisovskiy, S. E., Matrenichev, V. A., Pertsev, A. N., Sharkov, E. V., and Skolotnev, S. G.: Morphology and impurity elements of zircon in the oceanic lithosphere at the Mid-Atlantic ridge axial zone (6–13 N): Evidence of specifics of magmatic crystallization and postmagmatic transformations, Petrology, 25, 339–364, 2017. 
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. 
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.