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Revue Roumaine de Physique; v. 22(9); p. 1013
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[en] The chief advantage of the fission track (F.T.) technique is that it can be used for dating young volcanic glasses (obsidians) where most other well-established techniques fail. Lipari obsidians from three different lava flows have been dated to check the hypothesis of their historic origin. F.T. dating of Australasian tektites provides evidence in support of different falls in this vast strewn field, as reported elsewhere. (author)
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14. international conference on solid state nuclear track detectors; Lahore (Pakistan); 2-6 Apr 1988
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[en] The age of fission tracks and the thermal history are closely related. In addition, fission tracks have different sensitivities on different minerals (apatite, zirconium, titanite), and slight thermal alterations of the minerals can be detected by this method. The technique of fission track dating (Rb/Sr and K/Ar dating) is described and applied to the folding of the Alpine region and the heat-up of the Noerdlinger Ries region as a result of a meteorite impact. Fission track dating is a valuable aid in hydrocarbon prospecting. (DG)
[de]
Zwischen Spaltspurenalter und Waermegeschichte besteht ein unmittelbarer Zusammenhang. Hinzu kommt, dass Spaltspuren in verschiedenen Mineralien (Apatit, Zirkon, Titanit) unterschiedlich sensibel sind. Damit lassen sich schwache thermische Ueberpraegungen von Gesteinen erkennen und datieren. Die Handhabung der Spaltspurmethode (Rb/Sr- und K/Ar-Alter) wird kurz beschrieben und auf das Zeitalter der Hebung der Zentralalpen sowie die Erhitzung beim Meteoriteneinschlag im Noerdlinger Ries angewendet. Die Spaltspurenanalysen bieten auch eine wesentliche Hilfe bei der Prospektion von Kohlenwasserstoffen. (DG)Original Title
Spaltspuren - Uhr und Thermometer fuer Gesteine
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[en] Published in summary form only
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Desenvolvimento de microfiltros nucleares utilizando a tecnica de registro de tracos de fissao
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Sociedade Brasileira de Fisica, Sao Paulo, SP (Brazil); 382 p; 1990; p. 339; 13. Workshop on Nuclear Physics in Brazil; Caxambu, MG (Brazil); 2-6 Sep 1990
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[en] Etchable length reduction of thermal-neutron induced fission tracks is observed in four apatites that experienced temperatures no greater than approximately 230C subsequent to track formation. In each apatite, the mean etchable fission track lengths parallel (lc) and perpendicular (la) to the crystallographic c-axis as well as the arithmetic (conventional) mean (1m) decrease by approximately 0.5 μm during the time interval ∼10 min-∼3 weeks after irradiation. Two crystallographic orientation dependencies of mean etchable fission track length at room temperature are identified: (a) 1c>1a in all cases (tracks etched for 25 s at 230C in 5 M HNO3) and (b) la decreases approximately twice as fast as lc. These measurements strongly support previous suggestions that natural charged-particle tracks in crystalline materials, including fission tracks, undergo slow annealing at low ambient temperatures. The observed sensitivity of induced fission tracks in apatite to low-temperature annealing requires that care be taken to avoid heating apatites before and during track etching for so-called ''initial'' mean track length measurements. (author)
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6. International fission track dating workshop; Besancon (France); 5-9 Sep 1988
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[en] By means of the fission track method age determinations were performed on five natural rhyodacitic glasses (volcanic glasses). Although there are relatively great differences between fission track ages and hitherto existing geological classification, a rough correspondence could be found at least for three samples. K/Ar-ages which were determined with the same material are in a higher contradiction to the geological assumptions than the fission track ages. (author)
Original Title
Spaltspurenalter natuerlicher Glaeser; rhyolitic lava
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4. meeting on nuclear analytical methods; Dresden (German Democratic Republic); 4-8 May 1987
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[en] Recently Miller et al. (1990) published the results of the third interlaboratory comparison of fission-track ages for the 1988 Fission-Track Dating Workshop held at Besancon. The samples distributed to the Fission Track community were a zircon (88-1), two apatites (88-2 and 88-3) and a glass (88-4). The above authors discussed the results and concluded that, whereas zircon 88-1, apatite 88-3 and glass 88-4 seemed to be adequate for interlaboratory comparison, apatite 88-2 needed further investigation because of the wide range in measured age, especially in comparison with apatite 88-3, analysed by the same workers. One of the sample characteristics which could produce a large scatter of age is the large inter-grain track-content variation shown by apatite 88-2. The results of an extensive analysis of apatites 88-2 and 88-3 is presented to support this view. (author)
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[en] Comparing age determinations by persons with different degrees of experience in fission track dating shows that induced track counts are in good agreement but spontaneous track densities determined by beginners disagree with those determined by experienced persons. Proper identification of fission tracks appears to be of prime importance in glass samples; reliable data are the result of experience and careful selection of samples. (author)
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14. international conference on solid state nuclear track detectors; Lahore (Pakistan); 2-6 Apr 1988
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[en] The method of fission-track radiography of sandstone microsections containing uranium-bearing bitumen has been applied to attribute the uranium concentrations to hard black bitumen (anthraxolite), whereas the red and yellow bitumens insoluble in organic solvents (kerites) as well as yellow bitumens soluble in chloromorm bitumen (asphaltite, asphalt) that are transported into the black one are not uraniferous
Original Title
Raspredelenie urana v tverdykh bitumakh po dannym oskolkovoj radiografii
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Dopov. Akad. Nauk Ukr. RSR, Ser. B; ISSN 0002-3523;
; (no.7); p. 20-22

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[en] Empirical calculations for estimating dates by the fission track (external detector) method are presented and discussed. It is concluded that estimating the effective ratio of spontaneous to induced tracks from the respective totals of tracks counted is to be preferred in all cases. This can be supplemented, but not replaced, by other methods to provide insight into the quality or special characteristics of the sample under study. Plotting a probability density diagram as described here is recommended for the latter purpose. (author)
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