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The role of continental lithosphere in the generation of the Karoo volcanic rocks: evidence from combined Nd-and Sr-isotope studies

  • Authors: Hawkesworth, C J , Marsh, Julian S , Duncan, Andrew R , Erlank, Anthony J , Norry, M J
  • Date: 1984
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/134165 , vital:37080 , https://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetailamp;idt=6453596
  • Description: 143Nd/144Nd, 87Sr/86Sr, Sm and Nd analyses are reported on suites of Karoo volcanic rocks from the four sub-areas of Nuanetsi-north Lebombo, south Lebombo, the Central area, and north-west SWA/Namibia. Only seven (12%) of the samples analysed have positive ENd values similar to those found in the majority of recent mantle-derived rocks. Most of the rest have negative ENd (-1.0 to -17.1) and positive ESr, (+3.0 to +240) and thus must contain at least a contribution from source areas which were both old, and had lower Sm/Nd and higher Rh/Sr ratios than the bulk earth.
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  • Date Issued: 1984

The geochemistry of potassic lavas from Vulsini, central Italy and implications for mantle enrichment processes beneath the Roman region

  • Authors: Rogers, N W , Hawkesworth, C J , Parker, R J , Marsh, Julian S
  • Date: 1985
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/136034 , vital:37330 , https://doi.org/10.1007/BF00378265
  • Description: Major and trace element and 143Nd/144Nd (0.51209–0.51216) and 87Sr/86Sr (0.70879–0.71105) isotope analyses are presented on a representative group of lavas from the Vulsini district of the Roman magmatic province. Three distinct series are identified; the high-K and low-K series are similar to those described from other Italian volcanoes, while the third is represented by a group of relatively undifferentiated leucite basanites which are thought to be near-primary mantle melts.
  • Full Text: false
  • Date Issued: 1985

Vice Chancellor's toast to honorary graduates, 1986

  • Authors: Henderson, Derek Scott
  • Date: 1986
  • Language: English
  • Type: text
  • Identifier: vital:7518 , http://hdl.handle.net/10962/d1018395
  • Description: Vice Chancellor’s toast to the Honorary Graduates: E. Mphahele, R. Ackerman and N. Bailey. Graduation Luncheon Saturday April 12, 1986, Kimberley Hall.
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  • Date Issued: 1986

Two new species of clinid fishes (Perciformes: Clinidae) from South Africa

  • Authors: Heemstra, Phillip C , Wright, J E , J.L.B. Smith Institute of Ichthyology
  • Date: 1986-07
  • Subjects: Clinidae -- Classification , Perciformes -- South Africa
  • Language: English
  • Type: text , book
  • Identifier: http://hdl.handle.net/10962/70224 , vital:29635 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
  • Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 40 , Two new species of clinid fishes, Cancelloxus elongatus and Pavoclinus smalei, are described from specimens collected in 10 — 25 m off the southeastern Cape Province using rotenone and SCUBA. Generic assignment of both species is provisional pending a reassessment of the generic classification of South African clinid fishes.
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  • Date Issued: 1986-07

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ICEF Energy conference

  • Authors: CWIU
  • Date: 1990
  • Subjects: CWIU
  • Language: English
  • Type: text
  • Identifier: http://hdl.handle.net/10962/152450 , vital:39279
  • Description: The decline in world energy consumption caused by the twin oil price hikes of 1973 and 1979 checked development in the major market economies and triggered the process of industrial restructuring that has so profoundly affected all sectors and all regions. ore efficient use of more expensive energy and strategic policy changes have made major contributions to easing the historical reliance upon energy inputs - especially in the case of oil. As a result the ratio between energy consumption and growth of gross world production has diminished by nearly 25 % over the past fifteen years. It has been estimated that full use of available energy-efficient technologies could cut per capita energy use by as much as 50% without impeding economic growth. The extent to which these gains are realized will depend upon a wide variety of economic and developmental factors, among which the price management of fuels is a very important one. here has also been a change in the industrial mix of the major OECD economies with the decline of old industries using high energy imputs and the rise of high technology sectors with different and lower energy requirements. The shift of much basic manufacturing to new locations in the developing world and to the hitherto centrally planned economies is likely to precipitate a further important change in energy requirements. emand for energy is forecast to continue to grow at only about half the rate of general economic growth over the short to medium term. Consumption is very uneven on a world scale, however. In 1988 the world consumed energy equivalent to some 8 billion tonnes of oil (Tonnes Oil Equivalent, or TOE) - an average of 1.3 tonnes for every man, woman and child on Earth. While citizens of the USA will consume an average of 8 TOE per capita, however, the average for both Japan and Western Europe is around 3 TOE, while people in the Third World still rely on fuelwood and dried animal dung as important energy resources, consuming only a small fraction of a TOE each in many cases.
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  • Date Issued: 1990

NUMSA Bulletin - Free at last

  • Authors: NUMSA
  • Date: Feb 1990
  • Subjects: NUMSA
  • Language: English
  • Type: text
  • Identifier: http://hdl.handle.net/10962/114032 , vital:33880
  • Description: NUMSA structures take many decisions. These decisions are not taken in isolation, they are influenced by events, information and debates. The decisions taken will be found in the official documents and reports of NUMSA committees and congresses. These decisions are NUMSA policy. However, as part of the education programme, the Bulletin will carry background articles. These articles are not policy but are part of the educational resources of NUMSA.
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  • Date Issued: Feb 1990

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