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Feldspar Variability in Northwest Africa 7034The martian meteorite Northwest Africa 7034 (and pairings) is a breccia that provides important information about the rocks and processes of the martian crust (e.g., 1-3). Additional information can be gleaned from the components of the breccia. These components, specifically those designated as clasts, record the history of their parent rock (i.e., the rock that has been physically broken down to produce the clasts). In order to study these parent rocks, we must first determine which clasts within the breccia are de-rived from the same parent. Previous studies have be-gun this process (e.g., 4), but the search for genetic linkages between clasts has not integrated clasts with different grain sizes. We begin to take this approach here, incorporating igneous-textured clasts with both fine and coarse mineral grains. In NWA 7034, almost all materials (clasts and breccia matrix) are composed of the same mineral assemblages (feldspar, pyroxene, Fe-Ti oxides, apatite) with largely the same mineral compositions [1, 4-6]. Bulk breccia Sm-Nd systematics define a single isochron [7]. These observations are consistent with a majority of the components within NWA 7034 originating from the same geochemical source and crystallizing at roughly the same time.
Document ID
20170001708
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Santos, A. R.
(New Mexico Univ. Albuquerque, NM, United States)
Lewis, J. A.
(New Mexico Univ. Albuquerque, NM, United States)
Agee, C. B.
(New Mexico Univ. Albuquerque, NM, United States)
Humayun, M.
(National High Magnetic Field Lab. Tallahassee, FL, United States)
McCubbin, F. M.
(NASA Johnson Space Center Houston, TX, United States)
Shearer, C. K.
(New Mexico Univ. Albuquerque, NM, United States)
Date Acquired
February 22, 2017
Publication Date
March 20, 2017
Subject Category
Lunar And Planetary Science And Exploration
Report/Patent Number
JSC-CN-38642
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: The Woodlands, TX
Country: United States
Start Date: March 20, 2017
End Date: March 24, 2017
Sponsors: Universities Space Research Association, Lunar and Planetary Inst.
Distribution Limits
Public
Copyright
Public Use Permitted.
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