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Lewis, A.E.; Braun, R.L.; Higgins, G.H.
California Univ., Livermore (USA). Lawrence Livermore Lab1972
California Univ., Livermore (USA). Lawrence Livermore Lab1972
AbstractAbstract
No abstract available
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Source
11 Oct 1972; 26 p; PNE panel meeting; Vienna, Austria; 26 Nov 1972; CONF-721108--5
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Report
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AbstractAbstract
No abstract available
Original Title
Vliyanie tantala i reniya na ehlektricheskie svojstva MoS2
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Journal Article
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Progress Report
Journal
Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy; v. 7(3); p. 433-437
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Higgins, G.H.
California Univ., Livermore (USA). Lawrence Radiation Lab1971
California Univ., Livermore (USA). Lawrence Radiation Lab1971
AbstractAbstract
No abstract available
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Source
1971; 18 p; 101. annual meeting of the American Institute of Mining, Metallurgical and Petroleum Engineers; San Francisco, Calif; 20 Feb 1972; CONF-720204--2
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Report
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Conference
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AbstractAbstract
No abstract available
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Journal Article
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Geochimica et Cosmochimica Acta; v. 37(9); p. 2099-2124
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AbstractAbstract
No abstract available
Original Title
Uran i torij-indikatory formirovaniya sul'fidov poligennykh mestorozhdenij
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Journal Article
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Izvestiya Akademii Nauk Kazakhskoj SSR, Seriya Geologicheskaya; (no.4); p. 73-74
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AbstractAbstract
No abstract available
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International Atomic Energy Agency, Vienna (Austria); Proceedings series; p. 79-87; 1971; IAEA; Vienna; Symposium on the recovery of uranium from its ores and other sources; Sao Paulo, Brazil; 17 Aug 1970; IAEA-SM--135/34
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Book
Literature Type
Conference; Progress Report
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AbstractAbstract
[en] A linear relation is derived for the secular evolution of 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb ratios, that permits tests to be made for open system evolution on each system independently. Application of the method to conformable ore bodies of various geological age indicates that the available data do not demand an open system evolution for the last 3.8 b.y. 238U/204Pb and 232Th/204Pb of 9.66 +- 0.15 and 37.65 +- 1.14 respectively fit best the data for this time interval. A single stage evolution since 4.5 b.y. is unlikely, however, and the major events of continent formation postdate the Earth accretion by at least 400 m.y. The larger scatter of 207Pb/204Pb data about the evolution line relative to the other isotopic ratios is also interpreted as resulting from a series of continental differentiation events taking place at 3.85 +- 0.15 b.y. (author)
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Journal Article
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Geochimica et Cosmochimica Acta; ISSN 0016-7037;
; v. 48(1); p. 207-212

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AbstractAbstract
No abstract available
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Journal Article
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Economic Geology and the Bulletin of the Society of Economic Geologists; v. 66(6); p. 919-928
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[en] Galena samples from the Tynagh deposit yield a lead isotope model age for mineralization (348 +- 22 m.y.) that agrees with the stratigraphic dating of the deposit. In contrast, lead in galenas from the Silvermines deposits is anomalously radiogenic. It is considered that lead at Tynagh has been derived from multi-cycled sediments that approximate evolution in the orogen. The Silvermines data may be explained if the metalliferous fluids had preferentially leached radiogenic lead from the source rocks. At Navan the ore fluids may have evolved with time so that lead in galenas in the higher orebodies approximates orogene lead, implying that an increasingly larger volume of source rock was encountered by the hydrothermal system with time. It is suggested that the different μ values yielded by Tynagh and Navan galenas reflect differing 238U/204Pb ratios in their respective source regions. (author)
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Journal Article
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Transactions of the Institution of Mining and Metallurgy. Section B, Applied Earth Science; ISSN 0371-7453;
; v. 90 p. B115-B119

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AbstractAbstract
No abstract available
Source
32. Annual Meeting of the Brazilian Society for the Advancement of Science; Rio de Janeiro, Brazil; 6 - 12 Jul 1980; Published in summary form only.
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Journal Article
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Conference
Journal
Ciencia e Cultura; ISSN 0009-6725;
; v. 32(7); p. 289

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