Copper mineralization of the Yanhe deposit in Ludian county near the border area between Yunnan and Guizhou provinces is related to the strata of tuff breccia, and vesicular lava-ignimbrite beds in the ancient volcanic vents of the Emeishan flood basalts, as well as the Xuanwei Formation of Upper Permian composed of carbonaceous argillites and siliceous rocks. Ore minerals are manly native coppers, copper oxides, chalcocites and chalcopyrites. The native coppers shows occurrence in slab-flaky, net veined and impregnated. Copper mineralization is tightly associated with zeolitization, actinolite-tremolitization, bituminization and silicatization. These features are quite similar to those of the copper deposits in Keweenaw Peninsula, Michigan, USA. The key points for searching copper deposits with features of the Yanhe style in the large igneous province of the Emeishan basalts are:①discontinuous faces of lithosphere identified by geochemical steep zones of NW strike controlled rifting eruptions of the Emeishan basalts. ②magma eruptions with high fractionation from picritic to andesitic in magma chambers of vents.③synvolcanic hydrothermal activation depleted in sulfur and acid radicals in volcanic vent environments caused copper mineralization on large scale.④organic-inorganic interaction within strata enriched in organic matter provided strong reduction environments for native copper formation.⑤brittle-tough faulting induced progressive copper enrichment in ores.