NDLI: The mineralogy and petrology of anomalous eucrite emmaville

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The mineralogy and petrology of anomalous eucrite emmaville

Content Provider	NASA Technical Reports Server (NTRS)
Author	Franchi, I. A. Ross, D. K. Anand, M. Grady, M. M. Mittlefehldt, D. W. Charlier, B. L. A. Greenwood, R. C. Barrett, T. J.
Copyright Year	2015
Description	It has long been known that certain basaltic achondrites share similarities with eucrites. These eucrite-like achondrites have distinct isotopic compositions and petrologic characteristics indicative of formation on a separate parent body from the howardite-eucrite-diogenite (HED) clan (e.g., Ibitira, Northwest Africa (NWA) 011). Others show smaller isotopic variations but are otherwise petrologically and compositionally indistinguishable from basaltic eucrites (e.g., Pasamonte, Pecora Escarpment (PCA) 91007). The Emmaville eucrite has a delta O-17 value of -0.137 plus or minus 0.024 per mille (1 sigma), which is substantially different from the eucrite mean of -0.246 plus or minus 0.014 per mille (2 sigma), but similar to those of A-881394 and Bunburra Rockhole (BR). Currently little data exist for Emmaville in terms of petrology or bulk composition. Studying anomalous eucrites allows us to more completely understand the numbers of asteroids represented by eucrite- like basalts and thus constrain the heterogeneity of the HED suite. In this study, we present our preliminary petrological and mineral composition results for Emmaville.
File Size	358655
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20150001908
Archival Resource Key	ark:/13960/t0jt4nz6v
Language	English
Publisher Date	2015-03-16
Access Restriction	Open
Subject Keyword	Lunar And Planetary Science And Exploration Nasa Programs Pyroxenes Mineralogy Meteoritic Composition Field Emission Raman Spectroscopy Isotope Ratios Oxygen Isotopes Beam Currents Petrology Basalt Plagioclase Electron Probes Achondrites Isotopic Labeling Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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