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

Detailed Reference Information
Laul 1986
Laul, J.C. (1986). Chemistry of the Apollo 12 highland component. Journal of Geophysical Research 91: doi: 10.1029/JB091iB04p0D251. issn: 0148-0227.

Based on the chemical data for 30 elements for 17 highland fragments (3--35 mg) from 6 suites of Apollo 12 coarse fines, 11 chemical highland groups (6 with negative Eu anomalies and 5 with positive Eu anomalies) are identified in the Apollo 12 fragments. The highland chemical groups are represented by a range of petrographic types. Among the chemical groups four are newly recognized. One group is very high-K (VHK) KREEP-La at 520¿(chondrite) with a negative Eu anomaly at 50¿. The other three new chemical groups have positive Eu anomalies and these are as follows: a poikilitic/granulitic rock with La at 130¿; anorthosite with La at 30¿ and Eu at 90¿, and anorthosite with La at 12¿ and Eu at 25¿. The Apollo 12 highland suite is dominated by high-K KREEP and is similar to the Apollo 14 highland suite. The presence of high-K KREEP explains the relatively high LIL contents in the Apollo 12 soils. The plutonic suite data appear to show a trend in Eu anomaly versus longitude, i.e., eastern (Apollo 11) and western (Apollo 12 and 14) plutonic (ANT) rocks, as suggested by Warren et al. <1981>. Several parent magmas are suggested to explain the wide variety of plutonic and other highland suites observed at the Apollo 11 and 12 sites.

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