1、203040506070SiO2(wt%)Fe-Ni核橄榄岩橄榄岩(地幔地幔)玄武岩安山岩流纹岩Bulkearth地壳岩石地壳岩石1510500.0Wt.%Al2O3纯橄榄岩纯橄榄岩方辉橄榄岩方辉橄榄岩二辉橄榄岩二辉橄榄岩拉斑玄武岩拉斑玄武岩部分熔融部分熔融Wt.%TiO20.20.40.60.8残余固相残余固相From Niu,J Petrol.(2019),38(8):1047-1074abCio*wo=Cia*wa+Cib*wboF)F1(D1CCiOLF)F1(D1CCiOLF)F1(D1CCiOLF)F1(D1CCiOLMineralModeDensity Wt propWt%ol1
2、53.6540.18cpx333.4112.20.37plag512.7137.70.45 Sum303.91.00OlivineOpxCpxGarnetPlagAmph MagnetiteRb0.0100.0220.0310.0420.0710.29 Sr0.0140.0400.0600.0121.8300.46 Ba0.0100.0130.0260.0230.230.42 Ni14570.9550.016.829Cr0.7010341.3450.012.007.4La0.0070.030.0560.0010.1480.5442Ce0.0060.020.0920.0070.0820.8432
3、Nd0.0060.030.2300.0260.0551.3402Sm0.0070.050.4450.1020.0391.8041Eu0.0070.050.4740.243 0.1/1.5*1.5571Dy0.0130.150.5821.9400.0232.0241Er0.0260.230.5834.7000.0201.7401.5Yb0.0490.340.5426.1670.0231.6421.4Lu0.0450.420.5066.9500.0191.563Data from Rollinson(1993).*Eu3+/Eu2+Italics are estimatedRare Earth E
4、lementsConversion from mode toweight percentMineralModeDensityWt propWt%ol153.6540.18cpx333.4112.20.37plag512.7137.70.45 Sum303.91.00Batch Fractionation Model for Rb and SrCL/CO=1/(D(1-F)+F)DRbDSrF0.0450.848Rb/Sr0.059.351.148.190.16.491.135.730.154.981.124.430.24.031.123.610.32.921.102.660.42.291.08
5、2.110.51.891.071.760.61.601.051.520.71.391.041.340.81.231.031.200.91.101.011.09Di=1Di1Di110Ma)Cenozoic basaltsJianguo Basalts(104Ma)CFBPMLow Nb(Ta)contents,high Nb/Ta ratiosNb/Ta=19.1 0.6(1)10152025050100150Nb(ppm)Nb/TaMesozoic basalts(110Ma)Cenozoic basaltsJianguo Basalts(104Ma)CFBPM15%partial melt
6、ing of peridotite+eclogite(1%rutile)mixture under rutile stability fieldCe nozoic basaltsMe sozoic basaltsJianguo basaltsPeridotite/melt reaction by melt injectionPeridotite/melt reaction by melt filtrationMixing of peridotite+ec logitic residueE MIMORBEMIILCCMP0.51100.51150.51200.51250.51300.51350.51400.7000.7050.7100.7150.72087 Sr/86Sr143Nd/144Nd(b)From A.W.Hofmann
