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对滇西澜沧老厂地区玄武岩进行了系统的主微量元素和Nd-Pb同位素地球化学研究,结果表明该玄武岩为典型的洋岛玄武岩(OIB)。Nd-Pb同位素研究表明,玄武岩浆含富集地幔组分。老厂地区玄武岩浆活动可能与地幔热柱有关,玄武岩可能为地幔热柱(软流圈)熔融产生的岩浆与富集的岩石圈地幔岩浆混合的产物。
The main trace elements and Nd-Pb isotopic geochemistry of basalts in the Lancang Laohang area of western Yunnan were studied. The results show that the basalt is a typical oceanic basalt (OIB). Nd-Pb isotope studies have shown that basaltic magmas contain enrichment of mantle components. The basaltic magmatism in Laochang area may be related to the hot mantle plume, and the basalt may be the product of the magma mixed with the enriched lithospheric mantle magma produced by the melting of the mantle plume (asthenosphere).