The Depleted Mantle Component in Kerguelen Archipelago Basalts: Petrogenesis of Tholeiitic-Transitional Basalts From the Loranchet Peninsula     

DOUCET  SONIA; WEIS  DOMINIQUE; SCOATES  JAMES S.; NICOLAYSEN  KIRSTEN; FREY  FREDERICK A.; GIRET  ANDRE 《Journal of Petrology》2002,43(7):1341-1366

A geochemical study of 28 Ma tholeiitic to transitional basaltsfrom the Kerguelen Archipelago (Mont des Ruches and Mont Fontaine)indicates that three distinct magma types erupted within  相似文献   

GENERALISATION ET OPTIMALISATION DE LA METHODE DES DIFFERENCES FINIES POUR LA MODELISATION EN MAGNETO-TELLURIQUE (MT)*     

D. DOUCET  PHAM VAN NGOC 《Geophysical Prospecting》1984,32(2):292-316

After a brief discussion of MT modeling methods, we expose a particular application of finite elements that may be assimilated to a finite-difference method. The resulting linear equations obtained are similar to the transmission network equations for two-dimensional media. The introduction of resistivity discontinuities is more rigorous than in the usual finite-difference development. The consequence is an improved accuracy. We also present some conclusions about various problems encountered in modeling, such as the choice of network boundary conditions, linear system resolution and the final derivation of apparent resistivity. Application of successive over-relaxation is discussed and we detail rules for mesh design that control result accuracy and iterative convergence.  相似文献   

REPLY TO COMMENT BY J. T. WEAVER*     

D. DOUCET  PHAM VAN NGOC 《Geophysical Prospecting》1985,33(2):308-311

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