IJSTR

International Journal of Scientific & Technology Research

IJSTR@Facebook IJSTR@Twitter IJSTR@Linkedin
Home About Us Scope Editorial Board Blog/Latest News Contact Us
CALL FOR PAPERS
AUTHORS
DOWNLOADS
CONTACT
QR CODE
IJSTR-QR Code

IJSTR >> Volume 4 - Issue 5, May 2015 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



New Concept For Calculating The Age Of A Fossil Bone By Uranium-Series Method

[Full Text]

 

AUTHOR(S)

Samer Farkh, Abdallah Zaiour, Jalal Abdallah, Samir Farkh, Hanadi Ismail, Ahmad elMoll, Mirvat Ballout, Nafez Harb, Katia Haddad, Zaher Zeaiter

 

KEYWORDS

Keywords: bone, age, uranium, thorium, equilibrium, radioactive chain

 

ABSTRACT

Abstract: The age of a fossil bone can be determined based on the chain of radioactive uranium, as far as it behaves like a closed system. Uranium is incorporated into the bone after its death and disintegrates into thorium. The calculation of age is based on the assumption that living tissue does not contain uranium and at the entrance of uranium in the dead tissue, it did not contain thorium. Uranium is soluble in water and easily enters the bone while the thorium adsorbs on the clay soil particles since it is insoluble in water. In this work, we determined the equations needed to calculate the age of a bone sample. We have shown that age cannot be determined from the activity ratio between uranium-234 and its source uranium-238 because ratio had to be 1 from 3.5 million years, before they both entered the bone. Thus, we used the activity ratio of thorium-230 and its source uranium-234 which allowed us to go backward up to 350 000 years. In the case where 234U/238U is greater than 1, an amount of exogenous 234U should be deducted.

 

REFERENCES

[1] Cherdyntsev, V. V., Orlov, D. P., Isabaev, E. A., and Ivanov, V. I. "Isotopic composition of uranium minerals". Geochemistry, 10, 927-936. 1961.

[2] Cherdyntsev V.V. Chalov P.I., Khaidarov G.Z. On isotopic composition of radioelements in naturel objects and problems of geochronology. Trans. 3rd Session commiss. Determ. Abs. Age Geol. Formns. Izd. Akad. Nauk. SSSR, Moscou, pp. 175-233. 1955.

[3] Blackwell B., Porat N., Schwarcz H.P., Debenath A. ESR dating of tooth enamel comparison with 230Th/234U speleothem dates at la chaise de Vouthon (charente), France. Quaternary Science Reviews. Vol. 11, pp. 231-244. 1992.

[4] Labeyrie J. and Lalou C. Limites et espoirs de la méthode uranium-ionium (Th-230). In Lumley H. de et Labeyrie J. eds:" Absolute dating and isotope analysis in Prehistory- Methods and limits. Editions du CNRS, Proceeding, prétirage, pp. 265- 297. 1981.

[5] Thurber D.L. Anomalous 234U/238U in nature. Journal of Geophysical research, Vol. 67, pp. 4518-4520. 1962.

[6] Hassan Masaoudi, Christophe Falguères, Jean-Jacques Bahain, Yuji Yokoyama, Gibert Lhomme. Datation d'ossements et de planchers stalagmitiques provenant de L'Abri-des-Pêcheurs (Ardèche) par la méthode des déséquilibres des familles de l'uranium (U-Th). Quaternaire. Vol. 5, No. 2, pp. 79-83. 1994.

[7] Véronique Michel, Giovanni Boschian and Patricia Valensi. Datation ESR de dents d’aurochs du site Paléolithique inférieur de Castel di Guido (Italie). Archéosciences, 2008, Vol. 32, pp. 51-58. 2008.

[8] Barney J. Szabo. Results and Assessment of Uranium-Series Dating of Vertebrate Fossils from Quaternary Alluviums in Colorado. Arctic and Alpine Research, Vol. 12, No. 1, pp. 95-100. 1980.

[9] Cid AS., Anjos RM., Zamboni CB., Cardoso R., Muniz M., Corona A., Valladares DL., Kovacs L., Macario K., Perea D., Goso C., Velasco H. Na, K, Ca, Mg, and U-series in fossil bone and the proposal of a radial diffusion-adsorption model of uranium uptake. J. Environ Radioact. 136:131-9. doi: 10.1016/j. 2014.

[10] Mercier N., Valladas H., Bar-Yosef O., Vandermeersch B., Stringer C.B. and Joron J. -L. Thermoluminescence date for the Mousterian burial site of Es Skhul, Mt. Carmel. Journal of Archaeological Science. Vol. 20, pp. 169 174. 1993.

[11] Rink WJ., Mercier N., Mihailović D., Morley MW., Thompson JW., Roksandic M. New radiometric ages for the BH-1 hominin from Balanica (Serbia): implications for understanding the role of the Balkans in Middle Pleistocene human evolution. PLoS One. 8(2):e54608. doi: 10.1371/journal.pone.0054608. 2013.

[12] Grün R., Schwarcz H.P., Chadam J. ESR dating of tooth enamel: coupled correction for U-uptake and U-series disequilibrium. Nucl. Tracks Radiat. Meas, Vol. 14, No 1/2, pp. 237-241. 1988.

[13] Grün R., Stringer C., McDermott F., Nathan R., Porat N., Robertson S., Taylor L., Mortimer G, Eggins S, McCulloch M. U-series and ESR analyses of bones and teeth relating to the human burials from Skhul. J Hum Evol. Vol. 49(3):316-334. 2005.

[14] Yokoyama Y. Quaegebeur J.P., Bibron R., Leger C., Nguyen H.V., Poupeau G. Electron spin resonance (ESR) dating of bones of the Caune de l'Arago at Tautavel. In Lumley H. de et Labeyrie J. eds:" Absolute dating and isotope analysis in Prehistory- Methods and limits. Editions du CNRS, Proceeding, prétirage, pp. 457- 478. 1981.

[15] O'Meara, J.M.; Chettle, D.R.; McNeill, F.E.; Webber, C.E. The feasibility of measuring bone uranium concentrations in vivo using source excited K x-ray fluorescence. Physics in Medicine and Biology, Volume 42, Number 6, pp. 1109-1120 (12). 1997.

[16] Kaufman A. Thorium-232 concentration of surface ocean water. Geochimica Cosmochimica Acta, Vol. 33, pp. 717-724. 1969.

[17] Gascoyne M. Geochemistry of the actinides and their dauthers, pp. 34-61. In Ivanovich and Harmon: Uranium-series Disequilibrium. Applications to Earth, Marine and Environmental Sciences, Second Edition. Clarendon Press. Oxford. 1992.

[18] Szabo, B. J., H. E. Malde, and C. Irwin-Williams, 1969, Dilemma posed by uranium-series dates on archaeologically significant bones from Valsequillo, Puebla, Mexico: Earth Planet. Sci. Lett., Vol. 6, pp. 237–249. 1969.

[19] Rae, A. and M. Ivanovich, 1986, Successful application of uranium-series dating of fossil bone. Appl. Geochem., Vol. 1, p. 419–426. 1986.

[20] Szabo, B. J. Results and assessments of uranium-series dating of vertebrate fossils from Quaternary alluvium in Colorado. Arc. Alp. Res., Vol. 12, pp. 95–100. 1980.

[21] Kari Rasilainen, Henrik Nordman, Juhani Suksi, Nuria Marcos. Direct alpha-recoil as a process to generate U-234/U-238 disequilibrium in groundwater. MRS Proceedings. DOI: 10.1557/PROC-932-4.1. 2005.

[22] Rosholt J.N., Shields W.R. and Garner E.L. Isotopic fractionation of uranium in sandstone. Science, Vol. 139, pp. 224- 226. 1963.