I am assuming that you will be doing on source database and you have access to it and column definitions are unchnaged.
1)First restore the required archived redologs into some temporary location
2)Personally i prefer, to examine the archivefile one at a time
select sql_redo from v$logmnr_contents
As we did not use dictionary, the statements will be displayed as
DELETE FROM "UNKNOWN"."obj# <objid>"
3)Once you have identified which archivelog file contains your interest of sql statements,
to get sql statements in readable format