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Magnetostratigraphy of Kamchatkan Holocene formations of soil and pyroclastics

Kochegura V.V., Zubov A.G., Braytseva O.A. (1990) Magnetostratigraphy of Kamchatkan Holocene formations of soil and pyroclastics // Journal of Volcanology and Seismology. United Kingdom: Gordon and Breach Science Publishers S.А. and OPA Ltd.. Vol. 8, No. 6. pp. 825-849.

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Abstract

An account is given of magnetostratigraphic studies of Kamchatkan Holocene formations: the cover of soil and pyroclastics and the rocks of the cinder cones from the flank eruptions of Klyuchevskoi Volcano. А study was made of seven sections of the soil and pyroclastics and of samples from 17 cinder cones. А detailed account is given of the data processing procedure. Consideration is given to the reasons for the established incompleteness of the paleomagnetic record in the sections and it is demonstrated that adequately detailed reconstruction of the history of the geomagnetic 1ield is possible only provided that а study is made of а series of рагаllеl sections. The trajесtory of the geomagnetic field vector over the last 4000 years is determined on the basis of the material on radiocarbon datings. Seven cycles of paleosecular variations are distinguished in the age range investigated; each of these cycles has individual features by which they can be recognised and used for stratigraphic correlation. The, features taken were the direction of rotation of the vector, the shape and size of its loops, and the length of the cycles. Correlation of the sections based on paleomagnetic data was found to be in good agreement with the tephrostratigraphic correlation and enabled corrections to be made to the age of some horizons, including the archeological layers of the primitive settlement at Zhupanovo and the cinder cones. The metachronous magnetization present in some tephra layers was found to be an obstacle to any improvement in the accuracy and detail of magnetochronological reconstructions.
Item Type: Article
Title: Magnetostratigraphy of Kamchatkan Holocene formations of soil and pyroclastics
Title (translation): Магнитостратиграфия голоценовых почвенно-пирокластических образований Камчатки
Language: English
Journal or Publication Title: Journal of Volcanology and Seismology
ISSN Print: 0742-0463
ISSN Online: 1819-7108
Uncontrolled Keywords: Earth's magnetic field, secular paleomagnetic variation, tephra, soil-piroclastic cover, Kamchatka, Holocene
Subjects: State scientific and technical information rubricator (ГРНТИ) > 37 ГЕОФИЗИКА > 37.15 Геомагнетизм и высокие слои атмосферы > 37.15.31 Постоянное геомагнитное поле и вековые вариации
State scientific and technical information rubricator (ГРНТИ) > 38 ГЕОЛОГИЯ > 38.19 Геолого-геофизические исследования глубинного строения Земли > 38.19.27 Палеомагнетизм
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > _ Volcanoes of Kurile-Kamchatka Region
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Krasheninnikov
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Maly Semyachik
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Klyuchevskoy
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Zhupanovsky
References: 1. Alekseeva, V. A., A. G. Zubov and V. V. Kochegura, in: Problemy izucheniya paleovekovykh variatsii magnitnogo polya Zemli (Problems in study of the paleosecular variations of the Earth's magnetic field): 36-51 (Vladivostok, 1979) (in Russian).
2. Braitseva, O. A., I. A. Egorova et al., in: Vulkanicheskii tsentr: stroenie, dinamika, veshchestvo (The center of a volcano: dynamics, substance): 243-254 (Nauka, Moscow, 1980) (in Russian).
3. Braitseva, O. A. and S. N. Litasova, Vulkanologiya i seismologiya, No. 3: 92-96 (1982) (in Russian)
4. Braitseva, O. A., S. N. Litasova, and A. K. Ponomarenko, Ibid, No. 5: 18-24 (1983) (in Russian).
5. Braitseva, O. A. and I. V. Melekestsev, in: Problemy izucheniya paleovekovykh variatsii magnitnogo polya Zemli (Problems in study of the paleosecular variations of the Earth's magnetic field): 27-35 (Vladivostok, 1979) (in Russian).
6. Braitseva, O. A., I. V. Melekestsev et al., Vulkanologiya i seismologiya, No. 3: 14-28 (1980) (in Russian).
7. Braitseva, O. A., I. V. Florenskii et al., Ibid, No. 6: 3-19 (1985) (in Russian).
8. Dobretsova, Yu. G., in: Novoe v arkheologii severa Dal'nego Vostoka (Advances in the archeology of northern regions of the Soviet Far East): 59-65 (Magadan, 1985) (in Russian).
9. Zagnii, G. F., Geofiz. zhurn., 3, No. 5: 60-66 (1981) (in Russian).
10. Zubov, A. G., V. V. Kochegura, and N. A. Tkacheva, in: Problemy izucheniya paleovekovykh variatsii magnitnogo polya Zemli (Problems in study of the paleosecular variations of the Earth's magnetic field): 52-60 (Vladivostok, 1979) (in Russ-ian).
11. Nechaeva, T. B., V. V. Kochegura, and A. G. Zubov, Vulkanolog-iya i seismologiya, No. 2: 88-92 (1983) (in Russian) [Nechaeva T.B., Kochegura V. V., Zubov A. G. Studies of secular paleomagnetic variations in Kamchatka using Holocene tephra. Volcanology and Seismology, Gordon and Breach Science Publishers S. A., 1984.Vol.5 (2), pp. 213 - 218.]
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Depositing User: Александр Зубов
Date Deposited: 19 Apr 2013 02:43
Last Modified: 29 Jul 2013 05:06
URI: http://repo.kscnet.ru/id/eprint/289

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