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1. |
Ethics |
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Eos, Transactions American Geophysical Union,
Volume 70,
Issue 41,
1989,
Page 889-889
C. T. Russell,
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摘要:
The Gulf Coast province provides an array of scientific dilemmas ranging from the origin of the gulf itself to the causes and effects of long‐lasting circulation of hot, deep waters throughout the thick sedimentary section. The nature of the underlying crust and superjacent sediments and their contained waters; the precise timing of rifting; depositional history and diagenesis of the sedimentary sequence; fluid dynamics; geochemistry; hydrocarbon generation and migration; thermal history, including unusually high thermal gradient; and the fluid pressure regime in the deep sedimentary section are too poorly understood to permit quantitative analysis of processes that are of enormous scientific and practical importance. The area centered on DeWitt and Victoria counties, Texas, on the southeastern extension of the San Marcos arch, is probably the best location for a deep borehole to investigate these important phenomena and problems. The arch extends southeastward from exposed Grenville‐age basement rocks of the Llano uplift and separates the deep South Texas and Houston embayment salt basins. Seaward of the Llano uplift, highly deformed and slightly metamorphosed rocks of the Ouachita‐Marathon orogen have been intersected beneath Cretaceous sediments. The inferred edge of continental crust underlies an extensive Lower Cretaceous reef trend southeast of known Ouachita orogen rocks. Rapid thickening of Tertiary and possibly of Cretaceous sediments southeast of the shelf edge, together with geophysical indications of a relatively shallow Moho, suggests that “transitional continental crust” underlies sediments basinward of the inferred edge of continental crust. This transitional crust, the ultimate objective for a proposed deep well, could be rifted Grenville basement, buried rocks of the Ouachita trend, an island arc related to the Ouachita trend, or exotic continental basement related to a proto‐South American continent. To achieve optimum results to guarantee adequate basement penetration, a borehole should be designed to penetrate a relatively thin succession of lower Mesozoic synrift, graben‐fill sediments seaward of the shelf edge. Because of expected high temperatures and pressures, new technologies will need to be developed to successfully drill and
ISSN:0002-8606
DOI:10.1029/89EO00315
年代:1989
数据来源: WILEY
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2. |
Space plasma branch at NRL |
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Eos, Transactions American Geophysical Union,
Volume 70,
Issue 41,
1989,
Page 890-890
Anonymous,
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PDF (145KB)
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摘要:
The Naval Research Laboratory (Washington, D.C.) formed the Space Plasma Branch within its Plasma Physics Division on July 1. Vithal Patel, former Program Director of Magnetospheric Physics, National Science Foundation, also joined NRL on the same date as Associate Superintendent of the Plasma Physics Division. Barret Ripin is head of the newly organized branch. The Space Plasma branch will do basic and applied space plasma research using a multidisciplinary approach. It consolidates traditional rocket and satellite space experiments, space plasma theory and computation, with laboratory space‐related experiments. About 40 research scientists, postdoctoral fellows, engineers, and technicians are divided among its five sections. The Theory and Computation sections are led by Joseph Huba and Joel Fedder, the Space Experiments section is led by Paul Rodriguez, and the Pharos Laser Facility and Laser Experiments sections are headed by Charles Manka and Jacob Gru
ISSN:0002-8606
DOI:10.1029/89EO00316
年代:1989
数据来源: WILEY
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3. |
Raleigh leaves Lamont for Hawaii |
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Eos, Transactions American Geophysical Union,
Volume 70,
Issue 41,
1989,
Page 891-891
William Ward Maggs,
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摘要:
Barry Raleigh, director of Lamont‐Doherty Geological Observatory for the past 8 years, has left that job to become Dean of the University of Hawaii's new School of Oceans, Earth Sciences, and Technology.A search committee chaired by Lamont geochemist Charles Langmuir has been formed to find Raleigh's successor, and committee member Lynn Sykes, a seismologist at Lamont, said “We expect to have a short list drawn up by the end of the calendar ye
ISSN:0002-8606
DOI:10.1029/89EO00318
年代:1989
数据来源: WILEY
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Salute to Dr. Virgil A. Frizzell, Jr., American Geophysical Union congressional science fellow |
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Eos, Transactions American Geophysical Union,
Volume 70,
Issue 41,
1989,
Page 895-895
Anonymous,
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PDF (86KB)
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摘要:
Mr. Mineta Mr. Speaker, for the last year it has been my privilege to work with Dr. Virgil Allen Frizzell, Jr., the 13th congressional science fellow representing the American Geophysical Union.Dr. Frizzell came to Congress under the auspices of the American Association for the Advancement of Science, Congressional Science and Engineering Fellowship Program. Dr. Frizzell sought his 1‐year fellowship in the House of Representatives because, in his words:Earth scientists generate data that reflect on many Important Issues. We need to learn to communicate and interpret scientific findings better if we are to help legislators make better decisions concerning those issue
ISSN:0002-8606
DOI:10.1029/EO070i041p00895-03
年代:1989
数据来源: WILEY
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