Abstract
44 samples of the Jilin meteorite were analyzed by various laboratories for spallogenic, radiogenic, and trapped rare gases. A non-uniform distribution has been found for the rare gases of different origins. There have been found correlations among the spallogenic rare gases, with apparent depth effects. 43 samples were analyzed for their cosmogenic radionuclides60Co,26Al,36Cl,40K,53Mn,54Mn, and22Na. Correlations have been found between60Co and53Mn and between60Co and21Ne. The Jilin meteorite has a complex history of cosmic-ray irradiation. According to the two-stage model and the other fragments have a burying depth two stages,T 1=11 m.y. andT 2=0.3 m.y. The burying depth of all samples in the parent body can be obtained by the content of21Ne. Jilin meteorite No. 1 is located 20–142 cm from the surface, No. 4 ranges from 106–134 cm, and the other fragments have a burying depth between 15 and 150 cm. The equation of the reference plane for the surface of the 1-stage Jilin meteoroid is 0.24x+0.81y+0.53z+0.5=0. Use can also be made of60Co to determine the burying depth of all samples in the 2-stage Jilin meteoroid (under a geometry of 4π), and further to restore the preatmospheric form and size of the parent body. During its atmospheric passage, the Jilin had an ablation rate of ca. 30%. On the basis of the two-stage model and the concentration of21Ne and60Co in the samples, we propose a scheme to restore the relative position of all samples in the parent body. 12 sample-distribution regions can be sketched out. Also can be restored the relative position of all the samples in the parent body during the two stages.
Similar content being viewed by others
References
Ouyang, Z. and Zhou, X: 1979, A study on cosmogenic radionuclides in the meteorites falling recently in China, 16th International Cosmic-ray Conference, Conference Paper 2, OGII, 315.
Cooperation Group, Inst. of Atomic Energy and Guiyang Inst. of Geochemistry, Academia Sinica: 1977, Cosmogenic nuclides K40, Mn54 and Co57 in Jilin meteorites and their depth distribution, Geochimica, 3, 1973.
Cooperation Group, Inst. of Atomic Energy and Guiyang Inst. of Geochemistry, Academia Sinica: 1978, A preliminary study of cosmogenic radionuclide Al26 in the Jilin meteorite, Geochimica, 142.
Anders. E., private communication (1980).
Begemann, F., et al.: 1980, Über die Leichten Edelgase in dem Chondriten Jilin, Z. Naturforsch, 35a, 37.
Bull, R. K and Durrani, S. A: 1981, Laboratory annealling studies of thermoluminescence in the Jilin (H5) chondrite, Meteorities, 16.
Herpers, U., et al., unpublished data, (1981).
Heusser, G., et al., 1979, Complex irradiation history of the Jilin (H5) chondrite, Meteorities, 14, 412.
Honda, M., et al.: 1980, Irradiation history of the Jilin meteorite, Geochem. J., 14, No. 2, 83.
Honda, M., et al.: 1982, Cosmogenic nuclides in the Jilin chondrite, Earth and Planetary Science, 57, 101.
Nishiizumi, K., unpublished data, (1981).
Bourot-Denise, M. and Pellas, P.: 1981, Cosmic-ray track studies of Jilin chondrite, Meteoritics, 16.
Wang, S. et al.: 1980,40Ar/39Ar age and thermal history of the Jilin chondrite, Earth and Planet. Sci. Lett., 49, 117.
Weber, H. W., et al.: 1979, Rare gases in the H-chondrite Jilin, Meteoritics, 14, 558.
Liu, S., Ouyang Z and Goresy, A. El.: 1982, Mineralogy of the Jilin chondrite consortium samples, Meteoritics, 16, 305.
Heusser, G. and Ouyang Z.: 1982, Reconstruction of the preatmospheric Jilin chondrite by its60Co activity, Meteoritics, 16, 326.
Weber, H. W., et al.: 1982, Noble gases in the Jilin H5-chondrite, Submitted to Meteoritics.
Begemann, F., et al.: 1982, Radiogenic noble gases and the thermal history of Jilin, Meteoritics, 16, 293.
Trivedi, B. M. P. and Geoel, P. S.: 1973, Nuclide production rates in stone meteorite and lunar samples by galactic cosmic radiation, J. Geophys. Res., 78, 4885.
Nishiizumi, K. et al.: 1980, Calculated production rates for21Ne in semi-infinite body of H-chondrite composition, Earth Planet. Sci. Let., 50, 156.
Eberhardt, P. J. et al.: 1963, Neutrons in meteorites, in Earth Science and Meteorites, edited by J. Geiss and E. D. Goldbery, North-Holland, Amsterdam, 143.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ouyang, Z., Heusser, G. A study on cosmogenic nuclides in the Jilin meteorite and its irradiation history. Geochemistry 1, 421–434 (1982). https://doi.org/10.1007/BF03180347
Issue Date:
DOI: https://doi.org/10.1007/BF03180347