Here are the iron ore charts for November 15, 2015:
Qingdao spot was up but Tianjin benchmark fell 40 cents to $47.40. Paper mixed with Dalian up sharply Friday night to 353. Rebar average has collapsed to a new low. Chinese iron ore port inventories rose another 450k tonnes last week. I think it fair to say that without Samarco this market would be in full blown crisis.
On that, the closure could be permanent, from the AFR:
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