NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 75 of 5221
Preliminary results of Mn partitioning experiments on Murchison analogues
Author and Affiliation:
Boesenberg, Joseph S.(Rutgers Univ., New Brunswick, NJ, United States)
Delaney, Jeremy S.(Rutgers Univ., New Brunswick, NJ, United States)
Abstract: Eucrites, howardites, and diogenites have Fe/Mn ratios between 30 and 45, while carbonaceous chondrites have much higher values between 90 and 150. Stolper (1977) first showed that basaltic achondrites could evolve from a precursor chondritic material through simple partial melting. These experiments indicated that chondritic material heated to temperatures near 1180 C with a fugacity of one log unit below the iron-wustite buffer curve, produced a eucritic mineralogy that contained olivine, pigeonite, plagioclase, spinel, glass, and metal. The partial melting experiments of Jurewicz et al. (1992) on an hydrous Murchison and Allende also showed that HED compositions were produceable at temperatures between 1130 C and 1325 C with fugacities below and above the iron-wustite buffer curve. However, the MnO abundances of Jurewicz were too low to produce suitable Fe/Mn ratios for HED's. We present below our results of partial melting experiments on Murchison analogues that involved temperatures between 1180 C and 1580 C and fugacities below the iron-wustite buffer curve. Our experiments resulted in MnO abundances nearly twice that of Jurewicz and indicate that the production of basaltic achondrite-like Fe/Mn ratios from precursor chondritic material are possible.
Publication Date: Jan 01, 1993
Document ID:
19940007609
(Acquired Dec 28, 1995)
Accession Number: 94N12081
Subject Category: GEOPHYSICS
Coverage: Abstract Only
Document Type: Conference Paper
Publication Information: Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F; p 137-138
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Rutgers Univ.; Dept. of Geological Sciences.; New Brunswick, NJ, United States
Description: 2p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ACHONDRITES; CHONDRITES; MELTING; METEORITIC COMPOSITION; ANALOGS; BASALT; CARBONACEOUS CHONDRITES; FELDSPARS; GLASS; MINERALOGY; OLIVINE; PYROXENES; SPINEL
Imprint And Other Notes: In Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F p 137-138 (SEE N94-12015 01-91)
Availability Source: Other Sources
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: August 27, 2013
Contact Us