Martian magnetic paleopoles: A geostatistical approach

An Igneous Origin for Martian Magnetic Anomalies?

Introduction: The presence of alternately magnetized sources on Mars indicates that at one time Mars had a magnetic field, presumably generated by an internal dynamo, and that its polarity reversed at least once before shutting off. Mars does not currently possess a magnetic field, so the anomalies are attributed to remanent magnetization (RM) of minerals in the crust. The initiation and cessat...

Ionospheric characteristics above martian crustal magnetic anomalies

33.02 DPS Conference 2005.09.06 We studied several thousand electron density profiles from the Mars Global Surveyor Radio Science experiment. Electron densities in some of these profiles change significantly over vertical distances as short as 1--2 km, often causing localized ``bite-outs''. These ``anomalous'' profiles are preferentially located above crustal magnetic anomalies. Anomalous featu...

Paleointensity of the ancient Martian magnetic field

[1] Mars today has no core dynamo magnetic field. However, the discovery of remanent magnetization in Martian meteorites and intense crustal magnetization suggests that Mars once had a global field. Here we present high resolution maps of the magnetic field of Martian meteorite ALH 84001. These maps are the most sensitive yet quantitative study of natural remanent magnetization (with resolved a...

A Source for the Martian Crustal Magnetic Field

The magnitude of the martian magnetic crustal field requires intensities of magnetization of large volumes of the martian crust to be stronger than any comparable volumes on Earth [1, 2]. The Martian magnetic field at 4.0 Gyr was about one order smaller than the present geomagnetic field [3-5], and because the generating volume for the martian dynamo is considerably smaller than that for the ge...

A Geostatistical Approach for Describing Spatial Pattern in Stream Networks