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Linear magnetization feature associated with Rima SirsalisMeasurements of the magnetic fields by the electron reflection method in the neighborhood of the long structural rille Rima Sirsalis show that a magnetic field with a strength of at least 100 nT (100 gammas) is present over a region of the order of 10 km in width and at least 300 km long. The center of the magnetized region closely parallels and is centered on the rille. The linear magnetization feature extends at least to latitude 8 deg S, 60 km beyond the place where the rille disappears at the edge of Oceanus Procellarum. This extension is coincident with the extrapolation of the rille based on photographs. However, the magnetization is much weaker or entirely absent at 5 deg S and has vanished at 0 deg latitude. These results suggest that the rille is indeed a structural feature and has associated with it magnetization, either in the form of intrusive magnetized rock or of a gap in an otherwise more or less uniformly magnetized layer of rock of large extent in two dimensions. Furthermore, the rille structure evidently is present for some distance beneath the lava flows of the Oceanus Procellarum basin.
Document ID
19770040754
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Anderson, K. A.
Lin, R. P.
(California, University Berkeley, Calif., United States)
Mcguire, R. E.
(NASA Goddard Space Flight Center Greenbelt, Md.; California, University, Berkeley, Calif., United States)
Mccoy, J. E.
(NASA Johnson Space Center Houston, Tex., United States)
Russell, C. T.
Coleman, P. J., Jr.
(California, University Los Angeles, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
February 1, 1977
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 34
Issue: 1, Fe
Subject Category
Lunar And Planetary Exploration
Accession Number
77A23606
Funding Number(s)
CONTRACT_GRANT: NSG-7127
Distribution Limits
Public
Copyright
Other

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