Petrogenesis of E-type Mid-Ocean Ridge Basalts near Longitude 46.DEG.E, the Gulf of Aden
نویسندگان
چکیده
منابع مشابه
A hydrous melting and fractionation model for mid-ocean ridge basalts: Application to the Mid-Atlantic Ridge near the Azores
[1] The major element, trace element, and isotopic composition of mid-ocean ridge basalt glasses affected by the Azores hotspot are strongly correlated with H2O content of the glass. Distinguishing the relative importance of source chemistry and potential temperature in ridge-hotspot interaction therefore requires a comprehensive model that accounts for the effect of H2O in the source on meltin...
متن کاملEXPERIMENTAL CONSTRAINTS ON THE GENERATION AND EVOLUTION OF MID-OCEAN RIDGE BASALTS by Rosamond
Experimental petrology and major element chemistry are used to infer the melting processes that operate in the upper oceanic mantle to yield basaltic magma, and the subsequent cooling processes by which these magmas chill to form the oceanic crust. THE PRIMARY MAGMAS OF MID-OCEAN RIDGE BASALTS This paper reports experiments carried out between 9 and 16 kbar (0.9 1.6 GPa) using natural, primitiv...
متن کاملComposition and depth of origin of primary mid-ocean ridge basalts
Some workers have held that mid-ocean ridge basalts are fractionated from high pressure (15-30 kbar) picritic primary magmas whereas others have favored primary magmas generated at about 10 kbar with compositions close to those of mid-ocean ridge basalts. Of critical significance are presumed differences in composition between experimentally determined primary magmas and the least fractionated ...
متن کاملGeneration of mid-ocean ridge basalts at pressures from 1 to 7 GPa
We propose a model for the generation of average MORBs based on phase relations in the CaO-MgO-Al2O3-SiO2-CO2 system at pressures from 3 to 7 GPa and in the CaO-MgO-Al2O3-SiO2-Na2OFeO (CMASNF) system at pressures from 0.9 to 1.5 GPa. The MELT seismic tomography (Forsyth et al., 2000) across the East Pacific Rise shows the largest amount of melt centered at 30-km depth and lesser amounts at grea...
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ژورنال
عنوان ژورنال: Journal of Geography (Chigaku Zasshi)
سال: 2003
ISSN: 0022-135X,1884-0884
DOI: 10.5026/jgeography.112.5_732