Final action what I can sujjest is to use _allow_resetlogs_corruption=TRUE

Do as follows

1.Shutdown the database.

2. Add the following parameter in the init.ora file:

_allow_resetlogs_corruption=TRUE

3. Startup mount;

4. Recover database using backup controlfile until cancel;

5. If prompted for a logfile, type CANCEL.

6. alter database open resetlogs;

Since the database is in Noarchive mode this is the last option.u need to be careful while using _allow_resetlogs_corruption parameter as it may make ur database inconsistent.Since as per replies u only wants ur database open so u can use this option.