Abstract
Although Ir anomaly has been discovered in a number of C/T boundaries in the world, no positive results of this anomaly in Permian/Triassic (P/Tr) boundary were given. There are many well-developed P/T sections in South China. One of representative sections is located at the Baoqing quarry, Meishan Town, Changxin County, Zhejiang Province. Ir, Os, Re, Au, Pt, Cu and Mo were determined by the radiochemical procedure developed in our laboratory. (1) Besides those accessible by INAA. The results reveal that the refractory siderophile and other chalcophile elements have certain enrichment near and at the boundary layer. However, the Ir/Au and other element abundance ratios fail to accord with the extraterrestrial values. The nature of the boundary event was discussed in terms of elemental geochemistry.
Similar content being viewed by others
References
C. H. CHAI, S. L. MA, X. Y. MAO, K. N. LIAO, W. C. LIU, in the Proceedings of this MTAA Conference, 1986.
D. M. RAUP, J. S. Jr. SEPKOSKI, Science, 215 (1982) 1501.
L. W. ALVAREZ, W. ALVAREZ, F. ASARO, H. V. MICHEL, Science, 208 (1980) 1095.
W. ALVAREZ, L. W. ALVAREZ, F. ASARO, H. V. MICHEL, Geol. Soc. Amer. Spec. Pap. 190 (1982) 305.
F. ASARO, W. ALVAREZ, L. W. ALVAREZ, H. V. MICHEL, Geol. Soc. Amer. Spec. Pap. 190 (1982) 517.
A. S. ALEKSEEV, L. D. BARSUKOVA, G. M. KOLESOV, M. A. NAZAROV, A. G. GRIGORYAN, Lunar Planet. Sci., 14 (1983).
Z. H. ZHANG, Acta Petrol. Mineral. Anal. 2 (1983) 81.
J. K. ZHAO, Bull. Nanjing Inst. Geol. Palaeont., Academia Sinica, No. 2 (1981) 1
K. J. HSUE, H. OBERHAENSLI, J. Y. GAO, S. SUN, H. H. CHEN, U. KRAEHENBUEHL, Nature, 316 (1985) 809.
B. MASON, Handbook of Elemental Abundances in Meteorites, Gordon & Breach, New York, 1971.
C. H. CHAI, S. L. MA, X. Y. MAO, Y. Y. SUN, D. Y. XU, Q. W. ZHANG, Geology Review, in press.
C. H. CHAI, S. L. MA, X. Y. MAO, H. C. PENG, K. LU, X. Y. XIAO, Z. Y. OUYANG, Scientia Sinica, in press.
H. PALME, Geol. Soc. Amer. Spec. Pap., 190 (1982) 223.
E. D. GOLDBERG, in Chemical Oceanography, Vol. 1, J. P. RILEY and G. SKIRROW (Eds), Academic Press, 1975.
C. F. CHAI, S. L. MA, X. Y. MAO, Science Bulletin, 30 (1985) 1193.
Y. J. LIU, L. M. CHAO, Z. L. LI, H. N. WANG, T. Q. SU, J. Y. ZHANG, Elemental Geochemistry, Science Press, Beijing, 1984.
R. GANAPATHY, Science, 209 (1980) 198.
F. T. KYTE, Z. M. ZHOU, J. T. WASSON, Nature, 288 (1980) 651.
R. R. BROOKS, R. D. REEVES, X. H. YANG, D. E. RYAN, J. HOLZBECHER, J. D. COLLEN, V. E. NEALL, J. LEE, Science, 226 (1984) 539.
H. F. YING, Geol. Rev., No. 1 (1983) 303.
J. W. HE, J. Stratigraphy, 5 (1983) 197.
J. S. CHEN, M. R. SHAO, W. G. HUO, Y. Y. YAO, Scientia Geologica Sinica, No. 1 (1984) 88.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Chai, C.F., Ma, S.L., Mao, X.Y. et al. Neutron activation studies of refractory siderophile element anomaly and other trace element patterns in boundary clay between Permian/Triassic, Changxin, China. Journal of Radioanalytical and Nuclear Chemistry, Articles 114, 293–301 (1987). https://doi.org/10.1007/BF02039803
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02039803