Yes, there's info on how to do that in this LJ FAQ answer:-
http://www.livejournal.com/support/faq/326.html
Friends or a relative can send an email to support@livejournal.com asking to have moonlightmead's LJ put into memorial status. (We did this earlier in the year for one of our MFU cousins, Svetlanacat4.)
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Date: 2015-11-04 08:45 pm (UTC)http://www.livejournal.com/support/faq/326.html
Friends or a relative can send an email to support@livejournal.com asking to have moonlightmead's LJ put into memorial status. (We did this earlier in the year for one of our MFU cousins, Svetlanacat4.)