Moving Half a Mirror to another system?

 Suppose I have a ZFS filesystem based on a zpool that is composed of two mirrored slices from different disks. I would like to detach one of the slices and import the zpool/filesystem on another system. The idea is that the original is a live filesystem and the imported one would just be for testing.

Is this possible? 

I've tried the detach and then the import -f  and get nothing. I think this is probably because I am importing a slice not a disk. Is there anyway around this?

I've put this simply. The actual case is a very large filesystem made of several partitions each mirrored to a corresponding partition on a different disk array. I know I could create a snapshot and do a send/receive but besides the extra copying, the test is really one to see if the exisiting zpool could be migrated successfully to the other system (Very Old Solaris 10 Sparc -> New Solaris 11 Intel).