TEHRAN, Feb. 15 (Xinhua) -- Iran's Foreign Minister Seyed Abbas Araghchi left Tehran on Sunday for Geneva for a second round of indirect nuclear talks with the United States, the Foreign Ministry said.The talks are scheduled for Tuesday and will be mediated by Oman, the ministry said in a statement.Araghchi is leading what the ministry described as a diplomatic and specialized delegation. He is expected to meet Swiss Foreign Minister Ignazio Cassis, Omani Foreign Minister Sayyid Badr bin Hamad Al Busaidi, and Rafael Grossi, director general of the International Atomic Energy Agency, among other officials.Iranian and U.S. delegations, led by Araghchi and U.S. President Donald Trump's special envoy Steve Witkoff, held a first round of talks in Muscat on Feb. 6. Witkoff will again lead the U.S. delegation in Geneva, according to U.S. media reports.Iran's Deputy Foreign Minister Majid Takht-Ravanchi signaled Tehran's willingness to compromise on its nuclear program in exchange for sanctions relief. He told the BBC on Sunday that the ball was in America's court to prove that they want to do a deal.Iran's semi-official Fars news agency, citing a senior diplomat, reported that the Muscat talks also touched on potential economic cooperation, including oil, gas, and mining, as well as possible aircraft purchases.Hamid Ghanbari, a deputy foreign minister for economic diplomacy and a member of Iran's negotiating team, said discussions included joint investment in energy and mining projects and the potential purchase of U.S.-made aircraft. Any agreement, he said, must ensure the release of Iran's frozen assets abroad in a real and usable manner, according to Fars.Ghanbari said Iran was seeking a serious agreement but would not accept zero uranium enrichment, a key sticking point in past negotiations. Washington views enrichment inside Iran as a potential pathway to nuclear weapons, an allegation Tehran denies.U.S. Secretary of State Marco Rubio said Trump prefers diplom...