Dunite 72417 - A chemical study and interpretationThe rock selected for the study is one of the rare ultrabasic rocks, which seems to have survived early lunar differentiation. The Rb-Sr internal isochron for this dunite gave an age of about 4.55 AE. The dunite was sampled at Apollo 17, Station 2 from a single 10x20-cm clast incorporated into a KREEP-rich blue-gray breccia 72435, Boulder 3. Nine dunite samples were analyzed with the aid of instrumental and radiochemical neutron activation analysis procedures. Data for 27 elements are shown in a table. Attention is given to trapped liquid (magma), a garnet hypothesis, models for the dunite genesis, and magma compositions from which 15415 and 72417 crystallized.
Document ID
19780062762
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Laul, J. C. (Oregon State Univ. Corvallis, OR, United States)
Schmitt, R. A. (Oregon State University Corvallis, Ore., United States)