Microcracks, micropores, and their petrologic interpretation for 72415 and 15418Lunar samples 72415 and 15418 have complex microstructures that indicate a series of fracturing and healing events. Both samples contain relatively few open microcracks but many sealed and healed microcracks. Dunite 72415 contains abundant healed cracks that formed tectonically, symplectic intergrowths spatially and probably genetically related to microcracks, and a cataclastic matrix that has been extensively sintered. Metamorphosed breccia 15418 contains many post-metamorphic healed cracks, large shock induced cracks that have been sealed with glass, and a few younger, thin, open shock induced cracks.
Document ID
19770051909
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Richter, D. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Simmons, G. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Siegfried, R. (MIT Cambridge, Mass., United States)