Unraveling the role of mantle and crustal processes in Mo–Cu enrichment: Insights from the large Tongchanggou deposit, eastern Tibet

Porphyry-type molybdenum (Mo)–copper (Cu) deposits are major sources of Mo and significant contributors to Cu, making them a focal point of research in the field of mineral deposits. However, the origin of Mo and Cu in these deposits—whether they derive from a shared magma or distinct sources—remains an unresolved question. In this study, we present geochronological and geochemical data from mafic microgranular enclaves (MMEs), along with in-situ elemental compositions of plagioclase from the or