NEW EVIDENCE FOR EXTRAORDINARILY RAPID CHANGE OF THE GEOMAGNETIC-FIELD DURING A REVERSAL

被引：66

作者：

COE, RS ^{[1
]}

PREVOT, M ^{[1
]}

CAMPS, P ^{[1
]}

机构：

[1] UNIV MONTPELLIER 2,GEOPHYS & TECTON LAB,CNRS,URA 1760,F-34095 MONTPELLIER 05,FRANCE

来源：

NATURE | 1995年 / 374卷 / 6524期

关键词：

D O I：

10.1038/374687a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Palaeomagnetic results from lava flows recording a geomagnetic polarity reversal at Steens Mountain, Oregon suggest the occurrence of brief episodes of astonishingly rapid field change of six degrees per day. The evidence is large, systematic variations in the direction of remanent magnetization as a function of the temperature of thermal demagnetization and of vertical position within a single flow, which are most simply explained by the hypothesis that the field was changing direction as the flow cooled.

引用

页码：687 / 692

页数：6

共 39 条

[1] MAGNETIC AND OPAQUE PETROLOGICAL RESPONSE OF BASALTS TO REGIONAL HYDROTHERMAL ALTERATION
ADEHALL, JM
PALMER, HC
HUBBARD, TP
[J]. GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1971, 24 (02): : 137 - &
[2] BASEMENT HEATING BY A COOLING LAVA - PALEOMAGNETIC CONSTRAINTS
AUDUNSSON, H
LEVI, S
[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1988, 93 (B4): : 3480 - 3496
[3] BACKUS GE, 1983, GEOPHYS J ROY ASTR S, V74, P713
[4] ON THE COMBINATION OF THE MAGNETOTELLURIC AND THE GEOMAGNETIC DEPTHSOUNDING METHOD FOR RESOLVING AN ELECTRICAL-CONDUCTIVITY INCREASE AT 400 KM DEPTH
BAHR, K
OLSEN, N
SHANKLAND, TJ
[J]. GEOPHYSICAL RESEARCH LETTERS, 1993, 20 (24) : 2937 - 2940
[5] A GEOMAGNETIC POLARITY TIME-SCALE FOR THE PERIOD 0-17 MA, BASED ON 40AR/39AR PLATEAU AGES FOR SELECTED FIELD REVERSALS
BAKSI, AK
[J]. GEOPHYSICAL RESEARCH LETTERS, 1993, 20 (15) : 1607 - 1610
[6] THE CHARACTER OF THE FIELD DURING GEOMAGNETIC REVERSALS
BOGUE, SW
MERRILL, RT
[J]. ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, 1992, 20 : 181 - 219
[7] BOLSHAKOV AS, 1979, B ACAD SCI USSR PHYS, V15, P111
[8] CAMPS P, IN PRESS CR ACAD 2A, V320
[9] EVIDENCE SUGGESTING EXTREMELY RAPID FIELD VARIATION DURING A GEOMAGNETIC REVERSAL
COE, RS
PREVOT, M
[J]. EARTH AND PLANETARY SCIENCE LETTERS, 1989, 92 (3-4) : 292 - 298
[10] CONSTRAINTS ON MANTLE ELECTRICAL-CONDUCTIVITY FROM FIELD AND LABORATORY MEASUREMENTS
CONSTABLE, S
[J]. JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY, 1993, 45 (09): : 707 - 728

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