[Latinmag] Fwd: [Gpmag-l] March 3rd MagNetZ

[rapalini en gl.fcen.uba.ar]

-------- Mensaje Original --------
Asunto: [Gpmag-l]  March 3rd MagNetZ
Fecha: 2021-02-25 08:53
De: "Paterson, Greig" <Greig.Paterson en liverpool.ac.uk>
Destinatario: GPMAG List <gpmag-l en mailman.ucsd.edu>, EMRP List 
<emrp en gfz-potsdam.de>

  Hi all,

  We are very pleased to announce that Beck Strauss from NIST & NASA
Goddard Space Flight Center will be presenting next week on Wednesday
March 03 at 16:00 GMT.  Beck will be presenting “Constraining the
decline of the Moon's magnetic field through experimental analyses of
Apollo samples”. The abstract is below.

  As before, we will be emailing the meeting login details directly to
participants. So, if you are not already on the mailing list get in
touch (greig.paterson en liverpool.ac.uk) and we’ll add you to the list.

  These seminars are now being recorded and links to the recordings and
details of past and future seminars can be found here
https://www2.earthref.org/MagIC/magnetz [1] and on our YouTube channel
(https://www.youtube.com/channel/UCS-a6kZc8bdQoDMGSF1cIZg [2]).

  For attendees, please note that continued participation in a seminar
after recording beginnings constitutes agreement for the recording to be
publicly disseminated. Some, but not all attendees may be visible in the
recording. So, we recommend muting your microphone and turning off your
camera if you do not want to be visible.

  Lastly, thanks to everyone for supporting the seminar series.

  All the best

  Greig Paterson, University of Liverpool
(greig.paterson en liverpool.ac.uk)

  Anita Di Chiara, INGV-Rome and Scripps Institute of Oceanography
University of California, San Diego

  Abstract:

  Recent paleomagnetic studies of lunar rocks have suggested that the
Moon's magnetic field reached peak intensities on the order of ~77 μT
between 3.85 and 3.56 Ga and subsequently declined to surface
intensities of ~4  μT by 3.19 Ga. However, this decline in the
intensity of the lunar field has only been shown in a small number of
samples, presenting challenges for constraint of its timing and thus the
dynamo generation mechanisms that could be responsible. We present
microscopic and magnetic analyses of Apollo samples 12008, 12009, and
12015, three fine grained mare vitrophyre basalts with high magnetic
fidelity, indicating that these samples were not magnetized in
conditions consistent with a planetary magnetic field exceeding 4-7  μT
during their formation. These data are consistent with the results of
previous work on the initial decline of Moon's magnetic field and
confirm that the mechanism of lunar dynamo generation changed
dramatically between 3.6 and 3.1 Ga.



Links:
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[1] https://www2.earthref.org/MagIC/magnetz
[2] 
https://urldefense.com/v3/__https://www.youtube.com/channel/UCS-a6kZc8bdQoDMGSF1cIZg__;!!Mih3wA!UTEdY0E4CYCa9gpZhtOUAc2gD2q3jVriOB_mCpgvt1-lRmx49Hh3dg3-5KxXH_r2QI4-nSI$
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