Palaeomagnetism of Georgian Plio-Quaternary volcanic provinces (Southern Caucasus): a pilot study

被引：6

作者：

Goguitchaichvili, A ^{[1
]}

Calvo, M

Sologashvili, D

Alva, L

Urrutia, L

机构：

[1] Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico

[2] Univ Burgos, EPS, Dept Fis, Burgos 09006, Spain

[3] Tbilisi State Univ, Dept Geophys, GE-380064 Tbilisi, Georgia

来源：

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DE LA TERRE ET DES PLANETES | 2000年 / 331卷 / 11期

关键词：

palaeomagnetism; palaeointensity; Pliocene; Quaternary; Southern Caucasus;

D O I：

10.1016/S1251-8050(00)01471-3

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A preliminary palaeomagnetic and rock magnetic study was carried out on 248 Plio-Quaternary lava flows and three interbedded lacustrine sedimentary layers from Georgia (Caucasus). Most samples are characterised by a single palaeomagnetic component, carried by magnetite, as confirmed by susceptibility-temperature curves. Normal, reversed and in a few cases intermediate polarities were recognised. A palaeomagnetic mean direction of D = 6.0 degrees, I = 57.8 degrees, k = 30, alpha (95) = 3.8 degrees was obtained. Considering the three sampled volcanic provinces separately, differences with the expected palaeodeclination are non-significative (Kazbeki and Khzami) or small (Djavakheti). A mean palaeointensity value of 41.5 +/- 11.3 muT, corresponding to a mean VDM of 7.8 +/- 3.7.10(22) A.m(2) is obtained. (C) 2000 Academic des sciences/Editions scientifiques et medicales Elsevier SAS.

引用

页码：683 / 690

页数：8

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