Thermal history of ureilite, Pecora Escarpment 82506 deduced from cation distribution and diffusion profile of minerals

• Main Authors: Toyoda,Hiromi, Haga,Nobuhiko, Tachikawa,Osamu, Takeda,Hiroshi, Ishii,Teruaki
• Format: Report
• Language: English
• Published: Mineralogical Institute, Faculty of Sciences, University of Tokyo/Mineralogical Institute, Faculty of Sciences, University of Tokyo/Mineralogical Institute, Faculty of Sciences, University of Tokyo/Mineralogical Institute, Faculty of Sciences, University of Tokyo/Ocean Research Institute, University of Tokyo 1986
• Subjects: Mull; Pecora Escarpment; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1965; http://id.nii.ac.jp/1291/00001965/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1965&item_no=1&attribute_id=18&file_no=1

PCA82506 is relatively unshocked compared with most ureilites. Large unshocked pigeonite and olivine crystals were studied by means of single crystal X-ray diffraction, analytical TEM, optical microscope and an electronprobe. The chemical compositions of the PCA82506 pigeonites are (Ca)_6(Mg)_<76...