Abstract
Results of petromagnetic studies of epicontinental sediments at the Mesozoic-Cenozoic (K/T) boundary are generalized. Their analysis shows that an abrupt rise in the concentration of iron hydroxides is confined to this boundary. Their concentration is highest at the base of the boundary layer and drops by more than two times at it top. As distinct from iron hydroxides, other magnetic minerals were variously accumulated, depending on their origin and local deposition conditions of terrigenous material (for example, accumulation of particles of metallic iron and nickel, aerial transport of titanomagnetite grains of volcanic origin, and deposition of terrigenous particles of magnetite and ilmenite).
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Sh. Adamia, N. Salukadze, M. Nazarov, et al., “Geological Events at the Cretaceous-Paleogene Boundary in Georgia (Caucasus),” Geol. Carpat. 23(3), 35–43 (1993).
V. I. Bagin, T. S. Gendler, and T. A. Avilova, Magnetism of Iron α-Oxides and Hydroxides (IFZ AN SSSR, Moscow, 1988) [in Russian].
B. B. Ellwood, W. D. MacDonald, C. Wheeler, and S. Benoist, “The K-T Boundary in Oman: Identified Using Magnetic Susceptibility Field Measurements with Geochemical Confirmation,” Earth Planet. Sci. Lett. 206, 529–540 (2003).
A. F. Grachev, O. A. Korchagin, H. A. Kollmann, et al., “A New Look at the Nature of the Transitional Layer at the K/T Boundary near Gams, Eastern Alps, Austria, and the Problem of the Mass Extinction of the Biota,” Russ. J. Earth Sci. 7 (2005).
E. G. Gurvich, Metalliferous Oceanic Sediments (Nauchnyi Mir, Moscow, 1998) [in Russian].
H. J. Mauritsch, “Der Stand der Palaomagnetischen Forschung in den Ostaplen,” Leobner Hefte für Angew. Geophys. 1, 141–160 (1986).
E. A. Molostovsky, “Scalar Magnetic Characteristics of Rocks: Constraints on Sedimentation Conditions,” in Rock Magnetism Implications for Geological Surveying, Ed. by L. E. Sholpo, B. Sh. Rusinov, M. G. Ilaev, et al. Ed. by L. E. Sholpo, B. Sh. Rusinov, M. G. Ilaev, et al. (Nedra, Leningrad, 1986), pp. 58–73 [in Russian].
T. Nagata, Rock-Magnetism (Maruzen, Tokyo, 1961; Mir, Moscow, 1965).
D. M. Pechersky and A. V. Garbuzenko, “The Mesozoic-Cenozoic Boundary: Paleomagnetic Characteristic,” Russ. J. Earth Sci. 7(2) (2005).
D. M. Pechersky, D. K. Nourgaliev, and Z. V. Sharonova, “Magnetolithologic and Magnetomineralogical Characteristics of Sediments at the Mesozoic/Cenozoic Boundary: The Koshak Section (Mangyshlak Peninsula),” Fiz. Zemli, No. 11, 99–112 (2006a) [Izvestiya, Phys. Solid Earth 42, 957–970 (2006a)].
D. M. Pechersky, A. F. Grachev, D. C. Nourgaliev, et al., “Magnetolithologic and Magnetomineralogical Characteristics of Deposits at the Mesozoic/Cenozoic Boundary: Gams Section (Austria),” Russ. J. Earth Sci. 8(3) (2006b).
R. Rocchia, D. Boclet, Ph. Bonte, et al., “The Cretaceous-Tertiary Boundary at Gubbio Revisited: Vertical Extent of the Ir Anomaly,” Earth Planet. Sci. Lett. 99, 206–219 (1990).
S. V. Vonsovskii, Magnetism (Nauka, Moscow, 1971) [in Russian].
O. B. Yampolskaya, M. V. Pimenov, V. A. Fomin, et al., “Study of Magnetic Properties of Mountainous Crimea Cretaceous-Paleogene Boundary Deposits: Preliminary Results,” in Paleomagnetism and Magnetism of Rocks: Theory, Practice, and Experiment (Proc. Int. Seminar) (Kazan Univ., Kazan, 2004), pp. 276–279 [in Russian].
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © D.M. Pechersky, 2008, published in Fizika Zemli, 2008, No. 3, pp. 65–72.
Rights and permissions
About this article
Cite this article
Pechersky, D.M. Enrichment of sediments in iron hydroxides at the Mesozoic-Cenozoic boundary: A synthesis of petromagnetic data. Izv., Phys. Solid Earth 44, 232–238 (2008). https://doi.org/10.1134/S1069351308030063
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1069351308030063