A geochemical anomaly contiguous with the Dorsa Geike wrinkle ridge in Mare Fecunditatis

Details A geochemical anomaly contiguous with the Dorsa Geike wrinkle ridge in Mare Fecunditatis A geochemical anomaly contiguous with the Dorsa Geike wrinkle ridge in Mare Fecunditatis

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7.2649a&link_type=abstract

In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 3. (A77-34651 15-91) New York, Pergamon

Other

2

Chemical Composition, Lunar Maps, Lunar Maria, Lunar Topography, X Ray Fluorescence, Aluminum, Apollo 15 Flight, Apollo 16 Flight, Correlation, Lunar Orbits, Magnesium, Satellite-Borne Instruments, Silicon

Scientific paper

The orbital Al/Si X-ray fluorescence data from Apollo 15 and 16 reveal a concentration of unusually low Al/Si intensity ratios associated with a 220-km long ray along the northeast-southwest trending wrinkle ridge, Dorsa Geike, of the Mare Fecunditatis. The paper describes in detail the analysis of the Al/Si X-ray fluorescence data by which this geochemical anomaly was discovered. Correlation with other remote sensing data also indicates that the ridge area is different from the rest of the mare. It is possible that the material associated with the low Al/Si intensity ratio is of different composition than the adjacent mare regolith. Downslope transport along the ridge and arch could expose basalts which contrast chemically with surrounding regolith. The anomaly could also be due to extrusion of a volcanic rock of different composition at the fracture system represented by the wrinkle ridge.

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