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1. |
Ridge Crest Hot Springs: The story so far |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 12,
1980,
Page 129-131
J. M. Edmond,
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摘要:
The first evidence that required some form of hydrothermal activity at oceanic ridge crests came from the discovery about 15 years ago of iron‐manganeserich sediments close to the spreading axis of the East Pacific Rise [Bostrom and Peterson, 1966]. Subsequent exploration has shown that these deposits are a common feature on fast‐spreading ridges. Furthermore, they often form the basal section in sediment cores recovered by DSDP (Deep Sea Drilling Project). However, the scale of the activity necessary to produce the iron and manganese—whether surficial, i.e., associated with local eruptions, or pervasive, i.e., penetrating deep into the intrusion zone—can be ion vaguely sp
ISSN:0002-8606
DOI:10.1029/EO061i012p00129
年代:1980
数据来源: WILEY
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2. |
1981 Budget |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 12,
1980,
Page 131-132
Anonymous,
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摘要:
The president's budget as originally proposed at the end of January would have placed research and development (R&D) in good, if not robust, health, for fiscal year (FY) 1981. There were even provisions for some major new science proposals. However, the recent recognition that inflation has soared has led to strong budget‐cutting moves from the White House. EOS will keep track of these moves as they affect government agencies of interest. The following story was prepared from information contained in the original budget. Congress may or may not make the cuts proposed by the administratio
ISSN:0002-8606
DOI:10.1029/EO061i012p00131
年代:1980
数据来源: WILEY
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3. |
Models reflect new information on the compositions of Uranus and Neptune |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 12,
1980,
Page 132-132
Peter M. Bell,
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PDF (207KB)
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摘要:
Chemical models of planets of the Jovian group appear to be following a trend in composition toward lighter elements in the mean, resulting in a renewed interest in the geochemistry of hydrogen (plus helium in solar abundance), water, methane, and ammonia on a solar‐system‐wide basis. Recent Pioneer and Voyager data on Jupiter and a turn have now provided the basis for models of their interiors that are composed mostly of light elements.Hubbard and MacFarlane (J. Geophys. Res., 85, 225–234, 1980) have, in a new theoretical study of the structure and evolution of Uranus and Neptune, focused attention on ‘ices’ as a major mineral constituent. Thus as data from the outer planets become accessible in this decade, the goal of modeling the interior compositions of the major planets will be a realistic
ISSN:0002-8606
DOI:10.1029/EO061i012p00132-01
年代:1980
数据来源: WILEY
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