Paleomagnetism of cored sediment from Lake Atitlán, Guatemala: a preliminary study
Main Article Content
Abstract
Clay and silt in a 4-meter piston core from the deep basin of Lake Atitlan possess a strong and stable remanent magnetization when subjected to alternating-field demagnetization. We used paired samples from 263.5 centimeters and eight closely spaced samples between 276.4 and 282. 7 centimeters to assess the sediment for a study of paleomagnetic secular variation. Average inclination of 25.9° is close to the inclination of an axial dipole field (27.7°), and magnetite is the probable carrier of magnetization.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
References
AITKEN, M. J., 1974. Physics and Archaeology, Oxford University Press, 138-158.
BANERJEE, S. K., S. P. LUND and S. LEVI, 1979. Geomagnetic record in Minnesota lake sediments - absence of the Gothenburg and Erieau excursions, Geology, 7, 588-591.
BUCHA, V., 1971. Archaeomagnetic dating, in Michael H. N. and Ralph, E. K. (Eds.), Dating Techniques for the Archaeologists, MIT Press, 57-117.
DENHAM, C. R. and A. COX, 1971. Evidence that the Laschamp polarity event did not occur 13,300 - 30,400 years ago, Earth Planet. Sci Lett., 13, 181-190.
DILLON, W. P., 1980. Progress report on geophysical studies in caldera lakes and the Bahia de Amatique, Guatemala, Agency for International Development, U.S. Dept. of State, 1-33.
DuBOIS, R. L., 1975. Secular variation in the southwestern United States as suggested by archeomagnetic studies, in Fisher, R. M. et al (Eds.), Proceedings of the Takesi Nagata Conf., Goddard Space Flight Center, Greenbelt, Md., 133-144.
DuBOIS, R. L., T. S. HSUE, T. A. TULL and S. LEE, 1981. A comparison of ancient geomagnetic intensity in Mesoamerica with that of southwestern United States, EOS Trans. Am. Geophys. Union 62, 17, 272.
IRVING, E. and A. MAJOR, 1964. Post-depositional detrital remanent magnetization in a synthetic sediment, Sedimentology, 3, 135-143.
KING, R. F., 1955. The remanent magnetization of artificially deposited sediments, Mon. Notic. Roy. Astron. Soc. Geophys. Suppl, 7, 115-134.
KOVACHEV A, M., 1972. Upon the intensity of the ancient magnetic field during the last 2000 years in southeastern Europe, Earth Planet. Sci. Lett., 17, 199-206.
KOVACHEV A, M. and D. VELJOVICH, 1977. Geomagnetic field variations in southeastern Europe between 6500 and 100 years B. C., Earth Planet. Sci. Lett., 37, 131-138.
LIDDICOAT, J.C., 1976. A paleomagnetic study of late Quaternary dry lake deposits from the western United States and Basin of Mexico, Ph. D. diss., Univ. California, Santa Cruz, 466 p.
LIDDICOAT, J. C. and R. S. COE, 1979. Mono Lake geomagnetic excursion, J. Geophys. Res., 84, 261-271.
NEWHALL, C. G., 1980. Geology of the Lake Atitlan area, Guatemala: a study of subduction zone volcanics and caldera formation, Ph. D. diss., Darmouth College, Hanover, N. H., 287 p.
POPPE, L. J., C. K. PAULL and C. G. NEWHALL, 1981. X-ray mineralogy of cores from two Guatemalan caldera lakes, U. S. Geol. Survey Open-File Report (in prep.).
VEROSUB, K. L., J. O. DAVIS and S. VALASTRO, 1980. A paleomagnetic record from Pyramid Lake, Nevada, and its implications for proposed geomagnetic excursions, Earth Planet. Sci Lett., 49, 141-148.
WEI, Q. Y., T. C. LI, G. Y. CHAO, W. S. CHANG and S. P. WANG, 1981. Secular variation of the direction of the ancient geomagnetic field for Loyang region, China, Phys. Earth Planet. Inter., 25, 107-112.
WOLFMAN, D., 1973. A re-evaluation of Mesoamerican chronology: A. D. 1-1200, Ph. D. diss., Univ. Colorado, Boulder.