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The Origin of Eucrites: An Experimental PerspectiveThe origin of eucrites has been the subject of debate. At issue is whether high-Mg# eucrites such as Sioux County are primitive or evolved liquids. We believe that the problem of the origin of eucrites is essentially solved. Problems associated with the petrogenesis of other achondrite groups remain, but the eucrites, taken as a whole, seem to present a clear and understandable story that we will present using experiments, analyses, and calculations. The two traditional eucrite groupings, the partial melting trend a.k.a. Stannem trend) and the fractional crystallization trend (a.k.a. Nuevo Laredo trend) have both been reproduced experimentally. The partial melting trend culminates in Sioux County. Sioux County is also an acceptable starting point for the fractional crystallization trend. The implication of these experimental results is that it is extremely difficult to relate the eucrites to diogenites, a group of pyroxene cumulates that conceivably could have crystallized from eucrite parent magmas.
Document ID
19990025071
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Jones, J. H.
(NASA Johnson Space Center Houston, TX United States)
Mittlefehldt, David W.
(Lockheed Martin Engineering and Sciences Co. Houston, TX United States)
Jurewicz, A. J. G.
(Jurewicz (A. J. G.) Los Angeles, CA United States)
Lauer, H. V., Jr.
(Lockheed Martin Engineering and Sciences Co. Houston, TX United States)
Hanson, B. Z.
(NASA Johnson Space Center Houston, TX United States)
Paslick, C. R.
(Rock Valley Coll. Rockford, IL United States)
McKay, G. A.
(NASA Johnson Space Center Houston, TX United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1996
Publication Information
Publication: Workshop on Evolution of Igneous Asteroids: Focus on Vesta and the HED Meterorites
Issue: Pt. 1
Subject Category
Astrophysics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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