Joint venture agreement for mineral exploration with an arbitration clause. Constitution of an arbitral tribunal before the ICC. Articles of association of the legal entity created for mineral exploration containing an arbitration clause designating the Brazil-Canada Chamber of Commerce as the arbitration center. Grant of a stay of execution to the special appeal so that the arbitration before the ICC is not suspended. Impossibility of judicial intervention to resolve the impasse regarding arbitral jurisdiction, "which can be perfectly resolved through the avenue chosen by the parties themselves for the resolution of their disputes, since the kompetenz-kompetenz rule also applies in arbitration":