Many of the world's very large, disseminated, porphyry copper deposits formed in or near felsic to intermediate igneous plutons emplaced on convergent margins.

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This statement is true. Porphyry copper deposits are often associated with convergent margins and igneous intrusions. These deposits are typically large and disseminated, and are important sources of copper worldwide.

Many of the World's Very Large, Disseminated, Porphyry Copper Deposits