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1. |
Magsat reenters atmosphere |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 30,
1980,
Page 545-545
G. Mead,
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摘要:
NASA's magnetic‐field‐mapping satellite, Magsat, reentered the atmosphere north of the Arctic Circle and burned up on reentry at 0720 UT, June 11, after a longer‐than‐expected (7 1/2‐month) lifetime (see ‘Magsat to Reenter Soon,’EOS, 61, 475, May 27, 1980). The objectives of the mission were to provide a global vector survey of the main geopotential field and low‐altitude measurements of crustal anomalies. Data were obtained nearly up to the time of reentry. The Figure shows ‘quick‐look’ data from a 3000‐km‐long pass taken at 1940 UT on June 10, about 12 hours before reentry. The satellite was over the western Pacific, near the Mariana trench. The data were obtained at altitudes of 187 to 191 km, which is believed to be the lowest altitude at which magnetic field data have been obtained from a satellite. The quantity plotted is δB, i.e., the difference between the measured field magnitude and the field which is calculated from a 13th‐degree spherical harmonic model that is derived from Magsat data. The variations are probably due to crustal sources. If confirmed, the data will represent the highest resolution of crustal magnetic anomalies that has been achieved
ISSN:0002-8606
DOI:10.1029/EO061i030p00545-01
年代:1980
数据来源: WILEY
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2. |
Crustal Research Group efforts |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 30,
1980,
Page 546-546
Lee Greathouse,
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摘要:
At the meeting of the International Crustal Research Drilling Group (ICRDG) management panel at Orkustofnun (Icelandic National Energy Authority), Reykjavik, Iceland, on May 16, 1980, the following plans for crustal drilling investigations were formally adopted.An investigation of the Troodos ophiolite complex, Cyprus, in cooperation with the government of Cyprus, is the first target. Two drill holes, each 2 km deep, on the north flank of the complex, will give a complete section of crust of oceanic affinity from the top of the pillow basalts through the sheeted dike complex, plagiogranites, gabbros, and into cumulate gabbros. It is anticipated that nearly complete core recovery, via high‐speed diamond drilling, will allow a complete reference section, yielding lithologic composition, hydrothermal alteration, tectonic state, and physical properties of this example of oceanic crust. A third, 1‐km hole (starting from the base of the Agrokipia copper sulfide deposit) in conjunction with the 2‐km hole through the pillow basalts will allow delineation of the hydrothermal convection system responsible for that ore de
ISSN:0002-8606
DOI:10.1029/EO061i030p00546-03
年代:1980
数据来源: WILEY
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3. |
James B. Macelwane Award: Citation and Acceptance of Lawrence Grossman |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 30,
1980,
Page 547-548
Gerald J. Wasserburg,
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摘要:
It is a pleasure to present Lawrence Grossman for the Macelwane Award. This occasion is particularly auspicious since the AGU meeting is held here in Toronto, Canada, where Larry was born and raised. As a young man he worked in a mining company plant in northern Manitoba, fixing railroad ties and then doing copper analyses of drill cores in their assay office. On careful investigation I found that he also had some criminal connections with the nearby offices of the Ontario Provincial Police, which was located a short distance from here along the waterfront. Fortunately, this turned out to be on the legal side and not the seamy side. It appears that Larry had directed his natural investigative skills toward doing mineral and chemical analyses of soils scraped from the shoes of suspected criminals. Larry Grossman has not changed directions—just subjects. His investigative skills are now directed toward rocks and soils scraped from the sole of the early solar system. The solar nebula is a place for which scientific proofs are often circumstantial, there being few witnesses to the crimes of creatio
ISSN:0002-8606
DOI:10.1029/EO061i030p00547
年代:1980
数据来源: WILEY
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4. |
James B. Macelwane Award: Citation and Acceptance of Thomas W. Hill |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 30,
1980,
Page 549-550
A. J. Dessler,
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摘要:
It is a pleasure to present to Thomas W. Hill, a Macelwane Award for 1980. The pleasure for me is undeniably heightened by the fact that Tom was one of my students. Professors are generally aware that one of the rewards of academic research is being associated with an outstanding student. It allows one to boast without being immodest.
ISSN:0002-8606
DOI:10.1029/EO061i030p00549
年代:1980
数据来源: WILEY
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5. |
James B. Macelwane Award: Citation and Acceptance of Norman H. Sleep |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 30,
1980,
Page 550-550
Robert Geller,
Amos Nur,
George Thompson,
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摘要:
Tonight we are honoring Norm Sleep as one of the outstanding young solid earth geophysicists. However, he is our colleague at Stanford University because of a phenomenon of atmospheric, rather than solid earth, geophysics. This phenomenon is the great Chicago snowstorm of January 1979. Norm, a native of Kalamazoo, Michigan, was happily ensconced at Northwestern University, until our letter, inviting him to join us in California, arrived right after the worst Midwest blizzard in 10 years. Norm's career epitomizes the AGU motto, ‘unselfish cooperation in research.’ In addition to his many publications, he has contributed his expertise unstintingly to projects that range from seismology to field geol
ISSN:0002-8606
DOI:10.1029/EO061i030p00550
年代:1980
数据来源: WILEY
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