Top stories this week are likely to include: continued fallout over YPF expropriation; Leon Panetta to South America; Humala approves controversial mining project; and IMF warns of protectionism in Latin America.

Global Response to YPF Seizure: Repsol has threatened to take legal action against any company that invests in YPF SA, its Argentine subsidiary that was nationalized last week. This will complicate efforts by Argentine Planning Minister Julio de Vido to elicit investments in YPF. Beyond Repsol’s response, Argentine President Cristina Fernández de Kirchner faces continued condemnation from Spain and the European Parliament, which is looking at the possibility of imposing trade sanctions on Argentine imports. Petrobras, Brazil’s state-owned oil corporation, has pledged to expand cooperation with Argentina. Look for further official reaction from Europe this week.

Panetta in South America: U.S. Secretary of Defense Leon Panetta departs today for a five-day tour in South America, where he will visit Colombia, Brazil and Chile. A defense official reports that Panetta will stop in Bogotá to evaluate U.S.-funded Plan Colombia and discuss further measures to combat the Revolutionary Armed Forces of Colombia (FARC). Then, he heads to Brasilia and Rio de Janeiro to discuss potential military deals, including Embraer’s participation in a now-cancelled military aircraft contract for the U.S. effort in Afghanistan. AQ Senior Editor Jason Marczak notes, “Although the Embraer deal was worth less than $400 million, getting it back on track would be a huge plus for U.S.-Brazil relations.” Panetta and his Brazilian and Chilean counterparts will also discuss drug interdiction measures off the coasts of Africa and Central America—two of the world’s worst drug transit points.

Peru Approves Conga Mine: Peruvian President Ollanta Humala gave conditional approval last week to the controversial Conga mining project, constructed by U.S.-owned Newmont Mining Corporation. Previously, it had been stalled due to environmental concerns and protests by local Indigenous peoples in the Cajamarca region. Independent environmental auditors recommended a series of changes including larger artificial reservoirs that would allow for the adequate supply of water to local populations; Humala gave Newmont the green light for construction on the condition that these suggestions be met. Cajamarca President Gregorio Santos remains unconvinced, so watch out for the possibility of further local backlash.

IMF Warns of Protectionism: During its spring meetings over the weekend, the International Monetary Fund predicted 3.75 percent growth for the Latin America and Caribbean region this year. The IMF also warned emerging economies against adopting protectionist measures in response to the “accommodative monetary policy” adopted by the U.S. and other developed countries. The 3.75 percent figure represents a moderation of the region’s 4.5 percent growth in 2011. Given Brazil’s criticism of the United States’ monetary behavior, pay attention to whether Latin American economies heed the IMF’s advice.

*RELATED – Angelina Jolie Visits Refugees in Ecuador: In her capacity as a United Nations High Commissioner for Refugees ambassador, Angelina Jolie visited displaced Colombian refugees in Ecuador over the weekend. Read an Americas Quarterly dispatch on refugees in Ecuador from the Winter 2012 issue.