The EU will announce its decision to approve, denial or further investigation of the details by 8 November 2012, reported Reuters.
Primary focus of EU regulators would be to assess the market share of the combined company, which is slated to become one of the largest mining companies in the world.
The diversified mining and trading company will hold 50% of the European market for zinc in addition to market leadership in commodities such as thermal coal, ferrochrome and copper.
Xstrata owns the globally significant San Juan de Nieva zinc production unit in Spain, which could prompt concessions by way of asset sales, according to analysts.
Glencore seeks to purchase the remaining 66% share in Xstrata that the company does not already own for $33bn (£20bn).
