Geodynamo recharged

  title={Geodynamo recharged},
  author={Peter Edward Driscoll},
  journal={Nature Geoscience},
Transition from a weak and erratic geomagnetic field to a more stable one around 560 million years ago, inferred from palaeomagnetic measurements, suggests that the inner core may have solidified around that time, much later than thought. 

Paleomagnetism indicates that primary magnetite in zircon records a strong Hadean geodynamo

New paleomagnetic and electron microscope analyses that attest to the presence of a primary magnetic remanence carried by magnetite in these zircons and new geochemical data indicating that select Hadean zircon have escaped magnetic resetting since their formation are provided.

Paleomagnetic, Sedimentological, and Isotopic Data on Neoproterozoic Periglacial Sediments of Siberia: A New Perspective on the Low-Latitude Glaciations Problem

Abstract—Paleo- and rock magnetic, sedimentological, and isotope geochemical study is carried out for the carbonate member of Late Neoproterozoic Nichatka Formation (Siberian Platform, western slope

A Devious Equatorial Dipole Hypothesis: on the Low-Latitude Glaciations Problem and Geomagnetic Field Configuration in Late Precambrian

Abstract—The analysis of paleomagnetic data from Late Neoproterozoic complexes of Siberia and Australia is carried out. We show that the existing paleomagnetic datasets are in a disagreement with the



Young inner core inferred from Ediacaran ultra-low geomagnetic field intensity

An enduring mystery about Earth has been the age of its solid inner core. Plausible yet contrasting core thermal conductivity values lead to inner core growth initiation ages that span 2 billion

Powering Earth’s dynamo with magnesium precipitation from the core

It is shown that the precipitation of magnesium-bearing minerals from the core could have served as an alternative power source and that Earth’s dynamo would survive throughout geologic time even if core radiogenic heating were minimal and core cooling were slow.

The New Core Paradox

Fresh laboratory measurements and first-principles electronic structure calculations indicate a far greater capacity for the core to transport heat by conduction and, by implication, less ability to transportheat by convection.

Energetics of the Core

Crystallization of silicon dioxide and compositional evolution of the Earth’s core

The results demonstrate that the liquidus field of silicon dioxide (SiO2) is unexpectedly wide at the iron-rich portion of the Fe–Si–O ternary, such that an initial Fe-Si-O core crystallizes SiO2 as it cools, setting limits on silicon and oxygen concentrations in the present-day outer core.