unable to mount RAID 1 removed disk

I have removed two disk(sda1 & sdb1) from soft RAID1 array.

mdadm --stop /dev/md0
mdadm --remove /dev/md0

mdadm --zero-superblock /dev/sda1
mdadm --zero-superblock /dev/sdb1

Output of mdadm --examine /dev/sdb1

root@rescue:~# /mnt # mdadm --examine /dev/sdb1
mdadm: No md superblock detected on /dev/sdb1.

i was try to mount /dev/sdb1 to /mnt

mount /dev/sdb1 /mnt -t auto
mount: you must specify the filesystem type

mount /dev/sdb1 /mnt -t ext4
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

(/dev/md0 was ext4)

Output of fdisk -l

root@rescue:~# fdisk -l
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdb: 4000.8 GB, 4000787030016 bytes
255 heads, 63 sectors/track, 486401 cylinders, total 7814037168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
        /dev/sdb1            2048   209717247   104857600   83  Linux


WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sda: 4000.8 GB, 4000787030016 bytes
256 heads, 63 sectors/track, 484501 cylinders, total 7814037168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
    /dev/sda1            2048   209717247   104857600   83  Linux
Partition 1 does not start on physical sector boundary.

Output of fsck /dev/sdb1

fsck /dev/sdb1
fsck from util-linux 2.20.1
e2fsck 1.42.9 (4-Feb-2014)
ext2fs_open2: Bad magic number in super-block
fsck.ext2: Superblock invalid, trying backup blocks...
fsck.ext2: Bad magic number in super-block while trying to open /dev/sdb1

The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem.  If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 <device>
 or
    e2fsck -b 32768 <device>

i want to mount with existing data(sdb1 or sda1). any solution? i have important data.