【摘要】 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。更多还原

【Abstract】 A systematic investigation on major and trace elements and Nd-Pb isotope geochemistry date of the Laochang basalt in western Yunnan Province shows that the basalt is a typical oceanic island basalt(OIB).Nd-Pb isotope data revealed that basaltic magma contained enriched mantle component.The basaltic magma activity in Laochang may be related to mantle plume,and the basalt may be the mixed products of mantle plume(asthenosphere) melting of the magma and enriched lithospheric mantle magma.更多还原