Transmission electron microscope texture and crystal chemistry of coexisting ortho- and clinopyroxene in the Antarctic ureilite Frontier Mountain 90054: Implications for thermal history

• Main Authors: TRIBAUDINO M, FIORETTI AM, MARTIGNAGO, FEDORA, MOLIN, GIANMARIO
• Other Authors: Tribaudino, M, Fioretti, Am, Martignago, Fedora, Molin, Gianmario
• Format: Article in Journal/Newspaper
• Language: English
• Published: University of Arizona:Geosciences Department, 4717 East Fort Lowell Road:Tucson, AZ 85718:[phone], EMAIL: [e-mail], Fax: [phone] 1997
• Subjects: ORTHO-PYROXENE; STRUCTURE-REFINEMENT; ULTRAMAFIC NODULES; ORDER-DISORDER; MINERALOGY; DIOPSIDE; SYSTEM; AUGITE; MICROSTRUCTURE; CONSTRAINTS; Antarctic; Frontier Mountain; The Antarctic; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/11577/106713

Frontier Mountain (FRO) 90054, from Antarctica, is a rare clino- and orthopyroxene-bearing ureilite with a coarse equigranular oriented texture (grains up to 3 mm); it is classified as a low-shock Ca-rich type. The crystal chemistry of its clinopyroxene (Wo(39.3)En(54.6)Fs(6.1)), orthopyroxene (En(8...