Terrestrial heat and volcanism     

T. Boldizsár 《Pure and Applied Geophysics》1970,80(1):260-266

Summary Although active volcanic territories are not characterised by extreme high heat flow, yet terrestrial heat is one of the main, if not hte first cause of volcanic activities. About 94 per cent of the known active volcanoes are in connection with orogenic zones including ocean ridges, which mean that processes responsible for the evolution of the continents cause the overwhelming majority of volcanism.There stages of the evolution of the continental crust can be distinguished: 1.) Growth of the continental cores by differentiation, 2.) Existence of peripheral growing zones around the first core, 3.) Intergrowth of the existing continents.Volcanism, as well as seismicity are manifestations of the evolution of the crust which is caused by the development of heat sources in the mantle. The heat partly melt the upper mantle and induce slow plastic flow in connection of differentiation. The space, left empty by continental uplift is filled by the slow plastic inflow of mantle from the ocean. This slow redistribution of mantle and curstal rocks disturbs the stress field, the rocks fail along the strained zones and zones of fractures appear sometimes with volcanic activity.  相似文献   

Magnetism of natural pyrrhotite,haematite and ilmenite     

Vladimír Kropáček  Miroslav Krs  Reviewer F. Janák 《Studia Geophysica et Geodaetica》1971,15(2):161-172

Summary The paper deals with the magnetic properties of the natural minerals haematite, ilmenite and pyrrhotite. The natural remanent magnetization J_n, the volume susceptibility , the specific magnetization of saturation _so, the Curie temperature , the A.C. demagnetization of natural remanent magnetization, the thermal demagnetization J_n, the temperature dependence of the specific magnetization of saturation, and several other parameters were determined for the individual sets of minerals. Since natural minerals can and do contain various heterogeneous and isomorphic admixtures, their magnetic properties may change depending on the content and type of these admixtures. Therefore, all the investigations of the magnetic properties described in this paper were carried out with extensive sets of minerals, representing various Czechoslovak and world localities. A number of interesting results were obtained from the executed experiments, e.g., the different stability of the natural remanent magnetization of haematite with respect to A.C. demagnetization, the presence and type of heterogeneous inclusions in ilmenite, the phase changes connected with the -transition in natural pyrrhotites, etc. The types of distributions of the investigated values of the magnetic properties were also determined.  相似文献   

Refracted wave in a horizontally stratified medium with constant velocity gradients     

Jaromír Janský 《Studia Geophysica et Geodaetica》1969,13(4):423-443

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A proposition of the standardization of amplitude characteristics of short-period highly sensitive seismographs     

Z. I. Aranovich  O. A. Korchagina  Vladimír Tobyáš 《Studia Geophysica et Geodaetica》1968,12(1):38-49

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Ausgleichung des tschechoslowakischen Gravimeternetzes     

Lubomír Träger 《Studia Geophysica et Geodaetica》1968,12(3):246-258

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Editorial     

Jaromír Demek 《Geoforum》1973,4(3):3-5

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Über die Verteilung der aus Gezeitenbeobachtungen bestimmten gravimetrischen Faktoren in Europa     

Jan Pícha  Lumír Skalský  Rezensent M. Burša 《Studia Geophysica et Geodaetica》1973,17(4):376-382

auamaumuu am, n u a¶rt;u nuu n ¶rt;a ₂, ₂, ₁ u ₁ (u. 1–4). na ¶rt;a ¶rt;am au ¶rt;um au an¶rt;u mu naam. a n¶rt;aam unam nu nuu nna m uu u u mmu mam ¶rt; uu u a a mau n.

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Vorgetragen am 2. Internationalen Symposium Geodäsie und Physik der Erde, Potsdam, Mai 1973.  相似文献   

Terrestrial heat flow in Hungarian Permian strata     

Tibor Boldizsár 《Pure and Applied Geophysics》1967,67(1):128-132

Summary Latest measurements of terrestrial heat flow in the Hungarian and Russian parts of the Carpathian basin confirm previously measured high flow values between 2.0–3.3 cal/cm² sec. Recent measurement in the Permian anticline structure of the Mecseck. Mts. in Hungary gave 2.4 cal/cm²sec, whereas in the Russian part of the basin, near to the Hungarian border 2.6 cal/cm² sec was measured in Miocene sediments. For more than 100000 km² surface of the Carpathian basin covered by Hungary and parts of Slovakia and Russian the high heat flow is an established fact.  相似文献   

Kontinuierliche Messungen von Atmosphärischen Kondensationskernen     

P. Ackermann  Dr. M. Bider  Prof. Dr. F. Verzár 《Pure and Applied Geophysics》1954,29(1):167-167

Ohne Zusammenfassung  相似文献   

Erfahrungen mit dem automatischen Kondensationskernzähler     

H. Bitterli  F. Verzár 《Meteorology and Atmospheric Physics》1953,6(2):211-217

Zusammenfassung Es wird über Erfahrungen mit einem früher an dieser Stelle beschriebenen automatischen Kondensationskernzähler berichtet und speziell die Abhängigkeit der gemessenen Kernzahl von Expansionsgrad, Temperatur und relativer Feuchtigkeit untersucht, sowie die Einstellung einer konstanten Empfindlichkeit beschrieben.

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Summary Experiments are reported with the automatic condensation nuclei counter, which has already been described in this review. Adjustment for a constant sensitivity is described. The dependence of the number of nuclei upon the degree of expansion, temperature and relative humidity is especially studied.

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Résumé L'article rapporte des expériences faites avec un compteur automatique de noyaux de condensation, qui auparavant déjà a été décrit dans cette revue. Il examine en particulier la dépendance du nombre des noyaux mesuré du degré d'expansion, de la température et de l'humidité relative et décrit aussi la mise au point d'une sensibilité constante.

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Mit 6 Textabbildungen.  相似文献