Intracontinental Fold Belts


Book Description

Final Report of the Sonderforschungsbereich 48 - Göttingen, "Entwicklungen, Bestand und Eigenschaften der Erdkruste, insbesondere der Geosynklinalräume"







Namibia


Book Description

Prepared by the US Bureau of Mines with the purpose of providing the latest available data and information on mining and mineral resources in Namibia, this is a well-informed and useful reference work. The study covers regional geology, the history of exploitation, mining policies and legislation, production (including detailed tables on production and reserves 1970-1981) as well as water resources, energy supply, labour and transport. It argues that uranium has the greatest potential for long-term growth, and that elsewhere a pattern of diminishing ore reserves in the metals and to a lesser extent diamonds suggests a declining resource base. Shortages of water supplies, lack of artisans and skilled labour and "the unresolved international dispute"are identified as constraints to future growth in Namibia's mining industry. There is a chapter outlining the main features of mining legislation, and a lengthy, mainly technical bibliography listing close to 200 items. As a technical and economic surveyrelying heavily on information provided by the mining companies themselves, the study has considerable value. As a guide to the political economy of Namibia, it is, however, quite misleading. The UN Decree No. 1 of 1974 is not mentioned at all, while two decades of worker organization, liberation struggle and harsh colonial repression are dismissed in the assertion that "differences among worker languages and interests have inhibited the formation of a uniform political party or union". The study is notably weak on labour and social conditions, wages and labour legislation. For up-to-date information along the same lines, see Bureau of Mines Minerals Yearbook, vol. III: Area Reports: International, which contains a chapter on the mineral industry of Namibia. (Eriksen/Moorsom 1989).




Ecosystem Dynamics in a Polar Desert


Book Description

Presents information from the primary abiotic forces defining the system, and from the present hydrology, biogeochemistry and physics of major sites of organic carbon production of the McMurdo Dry Valleys. Additionally, research on the physical, chemical, and biological properties of the dry valley soils is included. The role of environmental management in long-term ecological studies is also addressed. The accompanying CDROM provides details and scale to visualize the McMurdo Dry Valleys from an ecosystem perspective.




Alkaline Rocks and Carbonatites of the World


Book Description

This text describes and provides ready access to the literature for all known occurrences of alkaline igneous rocks and carbonatites of Africa. Over 1000 occurrences are described from 40 countries. The descriptions include geographical co-ordinates and information of structure, general geology, rock types, petrography, mineralogy, ages, economic aspects and principal references. There are 348 geological and distribution maps and a locality index.




Geological Evolution of the Earth During the Precambrian


Book Description

Progress in Precambrian geology has been exceptionally great, indeed quite striking for geologists of the older generation; only some 30-40 years ago the Precambrian appeared as an uncertain and even mystic prelude to geologic evolution. Even the very name - Precambrian - means some indi visible unit in the early history of the Earth, the beginning of which is poorly known. At the same time it was obvious that the Precambrian formations are of extremely varied and complex composition and poor knowledge and lack of reliable methods of division and correlation were to blame for the lack of significant progress in studies of this early evolutionary stage of the planet. Certainly, even at the very start of Precambrian studies, the results obtained were quite promising, lifting as they did the mysterious veil over the regional Precambrian; but they presented no general realistic picture of this early stage in the Earth's evolution at that time. Recently, this situation has completely changed, due to new methods of study of the older forma tions, and due also to the refinement of some well-known methods, in particular of division, dating, and correlation of "silent" metamorphic strata. Application of different isotope methods of dating was most impor tant in providing objective rock age and thereby the age of geologic events recorded in these rocks. Thus it became possible to reconstruct the oldest geologic period of our planet.