The new mining code been published a few days ago (June 22). You may obtain it here: lei_54_2015_regimejuridico (in Portuguese).

Drop me a line if you are planing to invest in the Portuguese mineral sector (new opportunities created by the new law; hopefully no new obstacles): a comment here or a message to luischambel@sinese.pt; I will get back to you (currently in London for the Mining on Top: Africa).