EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Warren et al. 1983
Warren, P.H., Taylor, G.J., Keil, K., Kallemeyn, G.W., Rosener, P.S. and Wasson, J.T. (1983). Sixth foray for pristine nonmare rocks, and an assessment of the diversity of lunar anorthosites. Journal of Geophysical Research 88: doi: 10.1029/JS088iS01p0A615. issn: 0148-0227.

Eleven nonmare samples are characterized, generally both compositionally and petrographically. Five are almost certainly pristine (ferroan anorthosite 10056c, alkali anorthosite 14047c, ferroan anorthosite 14312c, anorthositic troctolite 14321c3, and granite 14321c4), and four are probably pristine (norite 14318c, noritic anorthosite 67215, 'quasi-pristine' ferroan anorthosite 73217c, and norite 78527). Five are unique anorthosites, extending the diversity of lunar anorthosites considerably. Alkali anorthosites, particularly 14047c, are extremely rich in incompatible elements. The first anorthosite from Apollo 11 with manifestations of pristinity (10056c) appears to be a normal member of the ferroan group. However, the first pristine ferroan anorthosites from Apollo 14 and 17 to be studied in detail (14312c and 73217c) both have unusually sodic plagioclase by ferroan standards. With only 75% plagioclase, 67215 is the first large (273 g) probably pristine ferroan sample with less than ~83% plagioclase. The nature of the correlations between longitude and such parameters as Eu and Sm concentrations, and Sc/Sm, Ti/Sm, and Ca/Na ratios, among pristine ANT samples has been elucidated, because five of the new pristine samples are from a western site (Apollo 14). Interestingly, ferroan anothosite 14312c has Ca/Na, Sc/Sm, and Ti/Sm ratios close to the normal ferroan values, but significantly displaced in the direction of the nonferroan western pristine rocks. This suggests that the composition-longitude relationships are as old as the late stages of the crystallization of the putative magma ocean.

BACKGROUND DATA FILES

Abstract

Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit