Data for: Depletion and metasomatism in the lithospheric mantle beneath the Oslo Rift (Southeast Norway): evidence from clinopyroxene xenocrysts

Major, trace element and Sr-Nd isotope data on complex clinopyroxenes in the oldest lavas, the B1 basalts, in the Oslo Rift, SE Norway. The clinopyroxenes have a homogeneous core of resorbed Cr-diopside originating in the SCLM. The Cr-diopside is coated by less Cr-rich concentrally zoned diopside formed partly by reaction between Cr-diopside and basaltic magma, followed by crystallization from mafic magma undergoing fractional crystallization, magma mixing and assimilation of crustal melts. Outwards the diopside turns into concentrically zoned augite formed from the host magma.

挪威东南部奥斯陆裂谷最古老熔岩（B1玄武岩）中复杂单斜辉石（clinopyroxenes）的常量、微量元素及Sr-Nd同位素数据。该类单斜辉石具有均一的被熔蚀铬透辉石（Cr-diopside）核部，其起源于大陆岩石圈地幔（Subcontinental Lithospheric Mantle, SCLM）。该铬透辉石被低铬含量的环带透辉石包裹；此类环带透辉石部分形成于铬透辉石与玄武质岩浆的反应，后续则由经历了分离结晶、岩浆混合及地壳熔体同化作用的镁铁质岩浆结晶形成。向外过渡，该透辉石逐渐转变为由寄主岩浆形成的环带型普通辉石（augite）。