TY - GEN

T1 - Preliminary Estimation of the Non-dipole Part of the Geomagnetic Field in the Quaternary Period Based on the Investigation of Marine Magnetic Anomalies on the Carlsberg Ridge

AU - Merkuriev, Sergei A.

AU - Demina, Irina M.

AU - Ivanov, Sergey A.

N1 - Merkuriev S.A., Demina I.M., Ivanov S.A. (2020) Preliminary Estimation of the Non-dipole Part of the Geomagnetic Field in the Quaternary Period Based on the Investigation of Marine Magnetic Anomalies on the Carlsberg Ridge. In: Yanovskaya T., Kosterov A., Bobrov N., Divin A., Saraev A., Zolotova N. (eds) Problems of Geocosmos–2018. Springer Proceedings in Earth and Environmental Sciences. Springer, Cham

PY - 2020

Y1 - 2020

N2 - Marine magnetic anomalies are continuous records of the history of geomagnetic field reversals preserved in oceanic crust over the past ~160 Myr. In addition, the shape of the magnetic anomalies depends on the effective inclinations of the external magnetic field vector I′0 and the remanent magnetization vector I′r can be numerically expressed by the skewness parameter θ=I′r+I′0−π . By determining the values of theta from magnetic profiles the inclination of the remanent magnetization can be found which leads to estimates of the contribution of the averaged non-dipole field. We investigated a series of closely spaced magnetic profiles intersecting the axis of the Carlsberg Ridge near the equator, and intersecting the axial anomaly region (Brunhes normal polarity chron C1n) and adjacent anomalies (subchron C2, Matuyama chron). The observed inclination anomaly near the equator can be viewed as an evidence of presence of the quadrupole component in the averaged non-dipole field.

AB - Marine magnetic anomalies are continuous records of the history of geomagnetic field reversals preserved in oceanic crust over the past ~160 Myr. In addition, the shape of the magnetic anomalies depends on the effective inclinations of the external magnetic field vector I′0 and the remanent magnetization vector I′r can be numerically expressed by the skewness parameter θ=I′r+I′0−π . By determining the values of theta from magnetic profiles the inclination of the remanent magnetization can be found which leads to estimates of the contribution of the averaged non-dipole field. We investigated a series of closely spaced magnetic profiles intersecting the axis of the Carlsberg Ridge near the equator, and intersecting the axial anomaly region (Brunhes normal polarity chron C1n) and adjacent anomalies (subchron C2, Matuyama chron). The observed inclination anomaly near the equator can be viewed as an evidence of presence of the quadrupole component in the averaged non-dipole field.

KW - Geomagnetic field

KW - Marine magnetic anomalies

KW - Non-dipole part

KW - Paleomagnetism

KW - SKEWNESS

UR - https://link.springer.com/chapter/10.1007/978-3-030-21788-4_13

U2 - 10.1007/978-3-030-21788-4_13

DO - 10.1007/978-3-030-21788-4_13

M3 - Conference contribution

SN - 978-3-030-21787-7

T3 - Springer Proceedings in Earth and Environmental Sciences

SP - 165

EP - 177

BT - Problems of Geocosmos–2018

A2 - Yanovskaya, TB

A2 - Kosterov, A

A2 - Bobrov, NY

A2 - Divin, AV

A2 - Saraev, AK

A2 - Zolotova, NV

PB - Springer Nature

CY - Cham

Y2 - 8 October 2018 through 12 October 2018

ER -