Lisa Hart-Madigan, Jamie J. Wilkinson, Stephanie Lasalle, Robin N. Economic Geology ;; 8 : — Oyu Tolgoi is a world-class, Late Devonian porphyry district in southern Mongolia. Because of its age and geodynamic setting, it has undergone a complex geological history that includes major postmineralization magmatic-hydrothermal events in close proximity to the porphyry deposits. The propylitic alteration halos that surround the Cu-Au deposits contain widespread hydrothermal titanite, as do the younger altered volcanic and intrusive rocks.
Impact and Correction of Analytical Positioning on Accuracy of Zircon U-Pb Dating by SIMS
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. Go to our Instructions for using Copyright Clearance Center page for details.