Fission Track Ages and Uranium Contents of Obsidians
نویسندگان
چکیده
منابع مشابه
Determination of uranium in human teeth, bones and tissues by the fission track method.
The uranium content of several human tooth, bone and soft tissue samples was determined by the fission tract method. The average uranium content in teeth, bones and soft tissues were 6.7, 8.4 and 64 ppb ash, respectively. The distribution of uranium in bones is less uniform than that of teeth, and the uranium content of soft tissues is generally higher than that of teeth and bone. The presence ...
متن کاملDetermination of uranium in porcelain teeth by the fission track method.
Porcelain teeth have been widely used in restorative and prosthetic dentistry because of their fine natures in aesthetics and hardness as an artificial denture. Among them there are some to which the uranium compounds have been added in order to simulate the fluorescence of the natural teeth. Recently, it was pointed out by several researchers that the radiations from uranium and its descendant...
متن کاملCooling history and exhumation of the nepheline syenites, NW Iran: constraints from apatite fission track
Thermal history and apatite fission-track ages were determined for the Kaleybar, Razgah and Bozqush alkaline intrusions which display Eocene-Oligocene stratigraphic age. These subduction-related intrusions are located in the Alborz-Azarbaijan magmatic belt which is characterized by a Paleogene magmatic flare-up associated with extensional/transtensional tectonism. The mean of Uranium content an...
متن کاملIsochronous mass measurements of uranium fission products
B. Sun1,2, R. Knöbel1,3, H. Geissel1,3, Yu. A. Litvinov1,3, K. Beckert1, F. Bosch1, D. Boutin1,3, C. Brandau1, L. Chen3, I. Cullen4, C. Dimopoulou1, B. Fabian3, M. Hausmann5, O. Klepper1, C. Kozhuharov1, S. A. Litvinov1,3, M. Mazzocco1,6, F. Montes5, G. Münzenberg1, A. Musumarra7,8, S. Nakajima9, C. Nociforo1, F. Nolden1, T. Ohtsubo10, A. Ozawa11, Z. Patyk12, W. R. Plaß3, C. Scheidenberger1,3, ...
متن کاملDecomposition of Fission - Track Grain - Age Distributions
The external-detector method of fission-track (FT) dat ing is capable of providing FT ages for individual mineral grains. As a result, tliis method when applied to dating detrital zircons in unreset sandstone samples has much potential for resolving the depositional age and provenance of the samples. One problem is that individual FT grain ages for detrital zircons usually have fairly low prec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Anthropological Society of Nippon
سال: 1970
ISSN: 0003-5505,1884-765X
DOI: 10.1537/ase1911.78.50