Geochemical aspects of some accumulation models for primary magmas
Tóm tắt
The compositions of primary magmas depend to some degree on the dynamic processes occurring in the partially molten region of the mantle. The compositional dependence is estimated for three models which assume either accumulation from a migmatized source region or accumulation entirely by the interstitial flow of magma. Accumulation from a migmatised region results in magmas with higher concentrations of incompatible elements than does batch melting, whereas accumulation by interstitial flow results in magmas with lower concentrations of these elements. The concentrations of refractory elements are almost independent of both the accumulation process and the degree of partial melting and are therefore usefull for the identification of primary magmas.
Tài liệu tham khảo
Boudier F, Coleman RG (1981) Cross section through the peridotite in Samail ophiolite, Southeastern Oman Mountains. J Geophys Res 86, 2573–2592
Estill RE, Duennebier FK (1979) Seismicity of Hawaii. In: Decker R (ed) Hawaii symposium on intraplate volcanism and submarine volcanism. Univ of Hawaii (abstract), 16
Fowler AC (1985) A mathematical model of magma transport in the astenosphere. Geophys Astrophys Fluid Dynamics 33:64–96
Frey FA (1984) Rare earth element abundances in upper mantle roocks. In: Henderson P (ed) Rare earth element geochemistry. Elsevier, Amsterdam, pp 153–203
Hart SR, Davis KE (1978) Nickel partitioning between olivine and silicate melt. Earth Plan Sci Lett 40:203–219
Hofmann AW, Hart SR (1978) An assessment of local and regional isotopic equilibrium in the mantle. Earth Plan Sci Lett 38:44–62
Kreyszig E (1967) Advanced engineering mathematics. Wiley, New York, 898 p
Langmuir CH, Bender JF, Bence AE, Hanson GN, Taylor SR (1977) Petrogenesis of basalts from the FAMOUS-area, Mid-atlantic ridge. Earth Plan Sci Lett 36:133–156
Maaløe S (1982) Geochemical aspects of permeability controlled partial melting and fractional crystallization. Geochim Cosmochim Acta 46:43–57
Maaløe S (1985) Principles of igneous petrology. Springer, Berlin Heidelberg New York Tokyo, 374 p
Maaløe S, Aoki K (1977) The major element composition of the upper mantle estimated from the composition of lherzolite. Contrib Mineral Petrol 63:161–173
Maaløe S, Scheie Å (1982) The permeability controlled accumulation of primary magma. Contrib Mineral Petrol 81:350–357
McKenzie D (1984) The generation and compaction of partially molten rock. J Petrol 25:713–765
Menzies M, Murthy VR (1980) Enriched mantle: Nd and Sr isotopes in diopsides from kimberlite nodules. Nature 283:634–636
O'Hara MJ (1985) Importance of the shape of the melting regime during partial melting of the mantle. Nature 314:58–62
Rayleigh JWS (1902) On the destination of binary mixtures. Philos Mag, Ser 6, 4:521–537
Roden MF, Murthy VR (1985) Mantle metasomatism. Ann Rew Earth Planet Sci 13:269–296
Sato H (1977) Nickel content of basaltic magmas: identification of primary magmas and a measure of the degree of olivine fractionation. Lithos 10:113–120
Schubert W (1977) Reaktionen im alpinotypen Peridotit-massiv von Ronda (Spanien) und seinen partiellen Schmelzprodukten. Contrib Mineral Petrol 62:205–220
Scott D (1984) Numerical modelling of porous flow in a deformable matrix. Abstract, US-Japan seminar on partial melting phenomena. University of Oregon, 19
Shaw DM (1970) Trace element fractionation during anatexis. Geochim Cosmochim Acta 34:237–243
Turcotte DL, Oxburgh ER (1978) Intraplate volcanism. Phil Trans R Soc Lond A 288:561–579
Waff HS (1980) Effects of gravitational field on liquid distribution in partial melts within the upper mantle. J Geophys Res 85:1815–1825