scholarly journals Pervasive remagnetization of detrital zircon host rocks in the Jack Hills, Western Australia and implications for records of the early geodynamo

2015 ◽  
Vol 430 ◽  
pp. 115-128 ◽  
Author(s):  
Benjamin P. Weiss ◽  
Adam C. Maloof ◽  
Nicholas Tailby ◽  
Jahandar Ramezani ◽  
Roger R. Fu ◽  
...  
2016 ◽  
Vol 450 ◽  
pp. 409-412 ◽  
Author(s):  
Benjamin P. Weiss ◽  
Adam C. Maloof ◽  
T. Mark Harrison ◽  
Nicholas L. Swanson-Hysell ◽  
Roger R. Fu ◽  
...  

2005 ◽  
Vol 113 (3) ◽  
pp. 239-263 ◽  
Author(s):  
James L. Crowley ◽  
John S. Myers ◽  
Paul J. Sylvester ◽  
Richard A. Cox

2020 ◽  
Vol 6 (15) ◽  
pp. eaav9634 ◽  
Author(s):  
Cauê S. Borlina ◽  
Benjamin P. Weiss ◽  
Eduardo A. Lima ◽  
Fengzai Tang ◽  
Richard J. M. Taylor ◽  
...  

The time of origin of the geodynamo has important implications for the thermal evolution of the planetary interior and the habitability of early Earth. It has been proposed that detrital zircon grains from Jack Hills, Western Australia, provide evidence for an active geodynamo as early as 4.2 billion years (Ga) ago. However, our combined paleomagnetic, geochemical, and mineralogical studies on Jack Hills zircons indicate that most have poor magnetic recording properties and secondary magnetization carriers that postdate the formation of the zircons. Therefore, the existence of the geodynamo before 3.5 Ga ago remains unknown.


2017 ◽  
Author(s):  
James L. Crowley ◽  
◽  
Mark D. Schmitz ◽  
John S. Myers ◽  
Jesse B. Walters
Keyword(s):  

Geology ◽  
2012 ◽  
Vol 40 (12) ◽  
pp. e281-e281 ◽  
Author(s):  
Michelle Hopkins ◽  
T. Mark Harrison ◽  
Craig E. Manning

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