Metamorphic peridotite and rock series of ophiolite belt in Mt. Ailao, Yunnan Province

The metamophic peridotite of ophiolite belt in Mt. Ailao is mmposed of lhenolite and harzburgite. The former shows the charateristics of primary pyrolite and the latter shows those of deleted (relict)pyrolite. By partial melting of Ihedite, two primary magmas: tholeiitic magma and picrite-basalt magma are formed. The former evoluted into gabbmdiabase-pyroxenic besalt rock series and show the characteristics of MORB; while the latter evoluted into gabbro-diorite-albite basalt-picrite basalt one, and show the characteristics of para-MORB.