In the paper "Processes involved in the formation of magnesian-suite plutonic rocks from the highlands of the. Earth's Moon" by Gregory A. Snyder, Clive R. Neal, ...
JOURNAL
OF GEOPHYSICAL
RESEARCH,
VOL. 100, NO. E8, PAGES 16,987-16,989, AUGUST
25, 1995
Correction to "Processesinvolved in the formation of magnesiansuite plutonic rocks from the highlandsof the Earth's Moon" by Gregory A. Snyder, C!ive R. Neal, and Lawrence A. Taylor In the paper"Processes involvedin the formationof magnesian-suite plutonicrocksfrom the highlandsof the Earth'sMoon" by GregoryA. Snyder,Clive R. Neal, andLawrenceA. Taylor (Journalof Geophysical Research, 100(E5), 9365-9388, 1995), the followingfiguresdid not reproducewell. The figuresand their captionsare reprintedbelow.
An in P!agioclase
Cr (ppm)
Figure 1. Plot of An contentof plagioclaseversusMg# in mafic mineralsfor "new" magnesiansuiteclasts.Also shownarefields for lunar alkali anorthosites, ferroan anorthosites, and the
Chondri
magnesian-suite.
10,000
Troct/An
Norites Dunites
1,000 ß-
100 7}'octolites'
10 GabbtvsNorite•¾
1
10
100
1,000 10,000
Cr/La Figure 3.
Copyright1995 by the AmericanGeophysicalUnion.
Log-log plots of (a) the moderatelysiderophile elementsCr (ppm) versusNi (ppm) for our "new" magnesiansuite rocks, and (b) moderatelysiderophile/lithophile element ratiosCr/La versusNi/La. Also shownare fieldsfor all large (> 1O0 mg), probably pristine gabbros/norites,
Palmr number95JE02124.
troctolites/anorthosites, ultramafic
0148-0227/95/95JE-02124502.00
meteorites.
16,987
rocks,
and
chondritic
16,988
CORRECTION
500
14303,261
Dunites 1oo
bbros &
200
14303,306
Norit.•es 14304,154 14304,174
14303,308
14305,443
14304,160
14305,450
1o
14305,489
1
....
o.1
II•1I I I I I I I I I I I I I I I I I I Ba Ce NdSmGd La
Yb
Eu Tb
I
Ba Ce NdSmGd
Hf Th
La
Lu Zr Ta
500 [
Troctolites &
200
Anorthosites
•
10
Hf Th
Lu Zr Ta
14321,1331
14304,166
,.• 50 20
Yb
14303,302
100 5•'....................... • ...........•:-:•'•' •:•...•?
,•
Eu Tb
14304,172 14305,451 14305,453
•
2
14305,460 Ba Ce NdSmGd La
EuTb
Yb
HfTh
Lu Zr Ta
Figure4. Chondrite-normalized plotsof trace-elements for magnesian suiterocks:(a) dunites;(b) norites;(c) troctolitesandanorthosites. Alsoshownareshadedfieldsfor all other"large,"pristine,magnesian-suite rocksof that lithology(Tables4 and6).
CORRECTION
16,989
0.6998
0.6994
•
MgSuite•':iii ........... x• 43% ..::..if!!! .......... !ii!',i!i7'"' !
0.6990
0.001
0.01
0.1
87Rb/s6sr Figure5. Plot of 87Rb/86Sr versus87Sr/86Sr (at 4.2 Ga reference
60
•
• 5o I 74 FAN
age) for magnesiananorthosite clast 14303,347relativeto fields for the ferroan anorthosites (FAN; [Nyquist, 1977]), KREEP [Nyquist, 1977; Nyquist and Shih, 1992], and an alkali anorthosite[Snyderet al., 1995]. Notice that the scaleon the abscissais in log units. KREEP may also extendto higher
ß,• 40
87Sr/S6Srvalues.
• 2
3o
lOO An in plagioclase
Figure 6. Plot of An contentin plagioclase versusMg# in orthopyroxene and/orolivine for cumulates from an average Apollo 15 KREEP basalt(asperSnyderet al. [1995]). Squares indicatethe percentages of crystallizationof the KREEP basalt parent. Arrowsare for crystallization andadditionof a trapped, residual,KREEP-basaltliquid.
(Rex:eivedJuly 12, 1995)