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Record Details

Record 34 of 2436
Ortho and para-armalcolite samples in Apollo 17.
Author and Affiliation:
Haggerty, S. E.(Massachusetts, University, Amherst, Mass., United States)
Abstract: Two paragenetically contrasting forms of armalcolite are present in basalts from the Apollo 17 Taurus-Littrow landing site. These armalcolites differ in optical properties, in crystal habit and in their distribution between coarse and fine grained rocks. It is proposed to call the two armalcolite forms ortho-armalcolite and para-armalcolite. Texural relationships and the evidence of experimental melting show that ortho-armalcolite is always the first crystalline phase to appear from unusually titanium rich magmas. The origin of para-armalcolite is not yet fully understood.
Publication Date: Apr 23, 1973
Document ID:
19730044937
(Acquired Dec 04, 1995)
Accession Number: 73A29739
Subject Category: SPACE SCIENCES
Document Type: Journal Article
Publication Information: Nature Physical Science; 242; Apr. 23
Publisher Information: United Kingdom
Financial Sponsor: NASA; United States
Description: 3p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: APOLLO 17 FLIGHT; BASALT; LUNAR ROCKS; MINERALOGY; OPTICAL PROPERTIES; TITANATES; CRYSTALLIZATION; FINE STRUCTURE; LUNAR LANDING SITES; SOLID SOLUTIONS
Imprint And Other Notes: Nature Physical Science, vol. 242, Apr. 23, 1973, p. 123-125. NASA-supported research.
Miscellaneous Notes: 1973, p. 123-125. NASA-supported research
Availability Source: Other Sources
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