Research article 08 Jul Correspondence : Johannes E. Pohlner johannes. Literature data and our own detailed microtextural analysis suggest that at least seven different types of baddeleyite—zircon intergrowths can be distinguished in nature.
Atomic-Scale Imaging Improves Dating of Planetary Events
Zircon and Baddeleyite — University of Arizona Laboratory for Isotope Geochemistry
The paper is devoted to the history of the discovery, petrological and mineralogical characterization, and U-Pb dating of baddeleyite ZrO 2 , which was separated from various Archean, Proterozoic, and Paleozoic rocks from Fennoscandia. U-Pb isochrons are reported for the baddeleyite-zircon pair obtained from the gabbronorites and anorthosites of the Proterozoic pyroxenite-gabbronorite-anorthosite association. The U-Pb baddeleyite dates for the early gabbronorite phase 2. U-Pb dates are also reported for baddeleyite from the Paleozoic carbonatites of Kovdor, Sebljarv, and Vuorijarvi.
Baddeleyite has long been recognized as one of the most important U-bearing minerals for dating silica undersaturated igneous rocks. Age determination of baddeleyite calls for analysis within small volumes using high-resolution secondary ion mass spectrometry SIMS because of its minuscule grain size as well as potential altered domains or micro-inclusions. In this study we carried out a series of tests of U—Pb and Pb—Pb measurements on Phanerozoic baddeleyite using a multi-collector Cameca IMS with oxygen flooding technique. If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you must formally request permission using Copyright Clearance Center.
Baddeleyite is a rare zirconium oxide mineral ZrO 2 or zirconia , occurring in a variety of monoclinic prismatic crystal forms. It is transparent to translucent, has high indices of refraction , and ranges from colorless to yellow, green, and dark brown. See etymology below.