Is 600 Myr long enough for the random palaeogeographic test of the geomagnetic axial dipole assumption?

被引：19

作者：

McFadden, PL ^{[1
]}

机构：

[1] Geosci Austr, Canberra, ACT 2601, Australia

来源：

GEOPHYSICAL JOURNAL INTERNATIONAL | 2004年 / 158卷 / 02期

关键词：

geocentric axial dipole hypothesis; palaeomagnetism;

D O I：

10.1111/j.1365-246X.2004.02321.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

A simple analysis suggests that a time interval of more than about 5000 Myr is needed for the random palaeogeographic test to be effective in assessing the geomagnetic axial dipole assumption. This time is so long as to render the test ineffective. Consequently, intervals of 600 Myr should be recognized as providing only a small sample that is likely to be biased towards low-inclination values.

引用

收藏

页码：443 / 445

页数：3

相关论文

共 9 条

[1] TEST OF DIPOLAR NATURE OF GEOMAGNETIC-FIELD THROUGHOUT PHANEROZOIC TIME [J].

EVANS, ME .

NATURE, 1976, 262 (5570) :676-677

[2] Geomagnetic field model for the last 5 My: time-averaged field and secular variation [J].

Hatakeyama, T ;

Kono, M .

PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 2002, 133 (1-4) :181-215

[3] Shallow bias of paleomagnetic inclinations in the Paleozoic and Precambrian [J].

Kent, DV ;

Smethurst, MA .

EARTH AND PLANETARY SCIENCE LETTERS, 1998, 160 (3-4) :391-402

[4]

McElhinny M.W., 2000, PALEOMAGNETISM CONTI

[5] The time-averaged paleomagnetic field 0-5 Ma [J].

McElhinny, MW ;

McFadden, PL ;

Merrill, RT .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 1996, 101 (B11) :25007-25027

[6] Non-dipole fields and inclination bias: insights from a random walk analysis [J].

Meert, JG ;

Tamrat, E ;

Spearman, J .

EARTH AND PLANETARY SCIENCE LETTERS, 2003, 214 (3-4) :395-408

[7] A PALEOMAGNETIC TEST OF THE AXIAL DIPOLE ASSUMPTION AND IMPLICATIONS FOR CONTINENTAL DISTRIBUTION THROUGH GEOLOGICAL TIME [J].

PIPER, JDA ;

GRANT, S .

PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 1989, 55 (1-2) :37-53

[8] Refining Gondwana and Pangea palaeogeography: estimates of Phanerozoic non-dipole (octupole) fields [J].

Torsvik, TH ;

Van der Voo, R .

GEOPHYSICAL JOURNAL INTERNATIONAL, 2002, 151 (03) :771-794

[9] Evidence for late Paleozoic and Mesozoic non-dipole fields provides an explanation for the Pangea reconstruction problems [J].

Van der Voo, R ;

Torsvik, TH .

EARTH AND PLANETARY SCIENCE LETTERS, 2001, 187 (1-2) :71-81