Last edited by Mazuhn
Monday, May 18, 2020 | History

3 edition of Fission-Track and K-ar Ages of Natural Glasses. found in the catalog.

Fission-Track and K-ar Ages of Natural Glasses.

United States Geological Survey

Fission-Track and K-ar Ages of Natural Glasses.

by United States Geological Survey

  • 322 Want to read
  • 21 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesU.S. Geological Survey bulletin -- 1489.
ContributionsNaeser, C., Izett, G., Obradovich, J.
ID Numbers
Open LibraryOL22076648M

all geography including DSDP/ODP Sites and Legs Africa Central Africa. You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them.,,, Free ebooks since

(=K-Ar and fission-track dating of tektites, crater glass and other natural glasses). Max-Planck-Institut für Kernphysik, Heidelberg, Jahresbericht. Gentner W., Kleinman B., Wagner G. A. New K-Ar and fission-track ages of impact glasses and tektites. Earth and Planetary Science Letters. 2 . b / ryan, m. p. and blevins, j. y. k. / the viscosity of synthetic and natural silicate melts and glasses at high temperatures and 1 bar ( pascals) pressure .

Das Wiener Naturhistorische Museum ist eines der bedeutenden naturwissenschaftlichen Museen der Welt. Seine frühesten Sammlungen sind über Jahre alt. Heute werden 25 Millionen Objekte wissenschaftlich betreut. Fission track dating is a radiometric dating technique based on analyses of the damage trails, or tracks, left by fission fragments in certain uranium-bearing minerals and glasses. Fission-track dating is a relatively simple method of radiometric dating that has made a significant impact on understanding the thermal history of continental crust.


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Fission-Track and K-ar Ages of Natural Glasses by United States Geological Survey Download PDF EPUB FB2

Get this from a library. Fission-track and K-Ar ages of natural glasses: a study of the problems associated with fission-track dating of glass. [Charles W Naeser; Glen Arthur Izett; John D Obradovich; Geological Survey (U.S.)]. Get this from a library. Fission-track and K-Ar ages of natural glasses: study of the problems associated with fission-track dating of glass.

[Charles W Naeser; Glen. Tectonophysics, () Eisevier Science Publishers B.V., Amsterdam Fission-track and K-Ar ages of "macusanite" obsidian glasses, (SE Peru): geodynamic implications G. Poupeau a, N. Sabil a, I.M. Villa b, G. Bigazzi b, N. Vatin-Perignon a, P.

Flores c, P. Pereyra d, G. Salas e and G. Arroyo c " URA 69/CNRS and Institut Dolomieu Cited by: Abstract. Fission tracks are zones of intense damage formed by the passage of fission fragments through a solid.

Given that the spontaneous fission of U occurs at a known rate, the age of a mineral or glass can be calculated from the amount of uranium and number of spontaneous fission tracks it contains. Zircon and glass are the most suitable materials for dating archaeological samples and Cited by: CONCLUSIONS The fission track plateau method of dating appears as a suitable dating procedure, leading to a better precision in age measurements, especially in the case of thermally lowered ages.

Poupeau et al. Table 1 Correlation coefficient between (fossil and induced) fission track densities and annealing temperatures above the Cited by: 8. Fission-track (FT) dating methods provide meaningful ages using silicic volcanic glass and are particularly applicable to the dating of young volcanics in calc-alkaline terrains where the 40 Ar/ 39 Ar method is less suitable due to low potassium values.

Successful glass–FT ages have been obtained on tephra beds as young as Late Pleistocene and as old as Middle Eocene, as demonstrated herein. Fission-track and K-Ar ages of natural glasses Previous K-Ar ages determined on crystal concentrates from these ashes varied by as much as 60.

Darwin Glasses from the recently discovered Darwin Crater in Tasmania were dated by the K-Ar and the fission track methods. The ages by both methods agree and yield a combined age of +/- * pre K-Ar, Ar-Ar and Rb-Sr ages recalculated using the decay constants of Steiger and Jager () Ages in millions of years (Ma) before present.

** Abbreviations: C - Crystalline Target; C-Ms - Metasedimentary Target; M - Mixed Target (ntary strata overlying crystalline basement); S - sedimentary target (i.e.

no crystalline. Fission track dating is the method used in thermochronology to find the approximate age of several uranium-rich minerals, such as nuclear fission of uranium ( U) happens in organic materials, damage tracks are are due to a fast charged particle, released from the decay of Uranium, creating a thin trail of damage along its trajectory through the solid.

Provenance Studies of Obsidian Artefacts Using the Fission-Track Analysis in South America: an Overview. Obradovich J.D.

and Izett G.A. () Fission-track and K-Ar ages of natural glasses. Geological Survey Bulletin,32p. Poupeau G., Labrin E., Sabil N., Bigazzi G., Arroyo P.G. and Vatin-Perignon N. () Fission track dating of It is thought that the date of the impact can be dated by using various radiometric dating methods to date the tektites.

For example, Australian tektites (known as australites) show K-Ar and fission track ages clustering aroundyears. The problem is that their stratigraphic ages show a far different picture.

In fact, Slusher (, p. 38) states "in order to match K-Ar ages, which average somewhat higher than the U-Th-Pb ages, to the latter ages, the value is arbitrarily taken.

However, this does not remedy the situation, and the ages are still too high." This indicates that there may be a systematic difference between U-Pb ages and K-Ar ages.

Comparison of K-Ar ages obtained for this study with published K-Ar ages suggests that metallogenic epochs for porphyry mineral deposits in the Canadian Cordillera occurred at approximately m.y.

and ± 10 m.y. for deposits of the plutonic and volcanic porphyry classes; and at approximately m.y., 80 nwy., 65 m.y., 50 m.y., 35r40 m.y. Attempts to determine the age of the LDG were made using the K‐Ar and fission track methods.

Due to the low K content of the glass, errors on K‐Ar ages are too high to be meaningful (Matsubara et al. ; Horn et al. ).Cited by: 2.

Concerning a possible change in decay rates, Dalrymple (, p. ) mentions that Pb-Pb ages for meteorites tend to be about one percent higher than Rb-Sr and K-Ar ages. This can be explained by the K-Ar ages measuring a slightly later event, or by uncertainties in the Rb-Sr decay constant.

Tektites (from Greek τηκτός tēktós, "molten") are gravel-sized bodies composed of black, green, brown, or gray natural glass formed from terrestrial debris ejected during meteorite term was coined by Austrian geologist Franz Eduard Suess (–), son of Eduard Suess.

They generally range in size from millimeters to centimeters. Fission track ages and ages of deposition of deep-sea microtektites. Science P.A. Zwart and P.B. Glass. Geographical distribution, age, and mass of microtektites in the Australasian, Ivory Coast and North American strewnfields.

Meteoritics A. Cox. Geomagnetic reversals. Science 3. Fission track dating Following the discovery of fossil tracks of spontaneous 3 fission of U(Price and Walker, ) and the develop-ment of the fission track dating method (Price and Walker, 5 ), our colleague Bob Fleischer led in the early appli-cations of fission track dating of natural.

The fourth edition of Physics of the Earth maintains the original philosophy of this classic graduate textbook on fundamental solid earth geophysics, while being completely revised, updated, and restructured into a more modular format to make individual topics even more : Frank D.

Stacey, Paul M. Davis. ages data zircon cooling tracks history annealing samples exhumation diffusion model length fission track dating sample histories rate surface mineral 40ar analysis 39ar grains rocks fault closure grain   Fission Track Dating: Fission track dating is in no better shape.

Faure (, pp. ) mentions that fission track dating is calibrated (the “zeta calibration”) using rocks of “known” ages – which are themselves dated based on other radiometric dating methods (usually K-Ar).using the K-Ar and fission track methods.

Due to the low K content of the glass, errors on K-Ar ages are too high to be meaningful (Matsubara et al.

; Horn et al. ). The only precise ages of the LDG come from fission track determinations, which gave ages Cited by: 2.