TY - JOUR
T1 - Some aspects of the late Tertiary geomagnetic field in Iceland
AU - Kristjánsson, Leó
AU - McDougall, Ian
N1 - The authors wish to pay tribute to the memory of Norman D. Watkins, whose unique qualities as a scientist were so essential for the success of our joint mapping projects in Iceland. These projects were supported, at various stages, by NSF grants to Dr Watkins, by the University of Rhode Island, by the Science Fund of Iceland and by the Alexander von Humboldt Stiftung in Bonn. We wish to thank those scientists, students and technicians who took part in the geological mapping of our survey areas in Iceland, and who carried out much of the measurement and computational work on the cores collected there. Particular thanks are due to Brooks B. Ellwood, now of the University of Georgia, and Kristjan Saemundsson of the National Energy Authority of Iceland. Thorkell Helgason and Sigfus Johnsen of the University of Iceland wrote special computer programs for the present paper. Bryndis Brandsdottir skilfully drafted the diagrams. drafted the diagrams.
PY - 1982/2/1
Y1 - 1982/2/1
N2 - Summary. In 1972–78, the late N. D. Watkins and others carried out ajoint field programme of geological mapping in the Mio‐Pliocene flood basalts of Iceland, including sampling for K‐Ar dating and palaeomagnetic research. The major part of the palaeomagnetic sampling is represented by 2462 lavas in five long composite sections through the lava pile. This paper deals with various statistical properties of this data set. It is concluded that geomagnetic reversals occur more frequently than is assumed in the current ocean‐floor polarity time‐scale. There is no evidence for significant asymmetries between normal and reverse polarity states of the field, neither as regards chron lengths, secular variation, or virtual dipole moment magnitude. Intensities of remanence in these lavas are shown to be well approximated in terms of a hyperbolic distribution. The latitude distribution of virtual magnetic poles can be fitted with a Bingham function having k′∼ 4.5, and low‐latitude poles do not occur preferentially in any particular longitude interval.
AB - Summary. In 1972–78, the late N. D. Watkins and others carried out ajoint field programme of geological mapping in the Mio‐Pliocene flood basalts of Iceland, including sampling for K‐Ar dating and palaeomagnetic research. The major part of the palaeomagnetic sampling is represented by 2462 lavas in five long composite sections through the lava pile. This paper deals with various statistical properties of this data set. It is concluded that geomagnetic reversals occur more frequently than is assumed in the current ocean‐floor polarity time‐scale. There is no evidence for significant asymmetries between normal and reverse polarity states of the field, neither as regards chron lengths, secular variation, or virtual dipole moment magnitude. Intensities of remanence in these lavas are shown to be well approximated in terms of a hyperbolic distribution. The latitude distribution of virtual magnetic poles can be fitted with a Bingham function having k′∼ 4.5, and low‐latitude poles do not occur preferentially in any particular longitude interval.
UR - https://www.scopus.com/pages/publications/0019909887
UR - https://iris.hi.is/ws/files/44845779/Some_aspects_of_the_late_Tertiary_geomagnetic_field_in_Iceland.pdf
U2 - 10.1111/j.1365-246X.1982.tb04901.x
DO - 10.1111/j.1365-246X.1982.tb04901.x
M3 - Article
SN - 0956-540X
VL - 68
SP - 273
EP - 294
JO - Geophysical Journal International
JF - Geophysical Journal International
IS - 2
ER -