12:30 PM - 12:45 PM
[SCG58-03] Petrological and spacial variations of the near off-axis magmatism controlled by a ridge segment structure
Keywords:near off-axis magmatism, ridge segment structure, wehrlitic intrusion, Oman ophiolite
Although Phyton et al. (2007) identified that the seawater penetrates the lower oceanic crust, this study suggests the fluid of seawater implicates magma compositions of near off-axis magmatism. We focus on vertical variations of wehrlitic intrusions, and show the spatial variation of petrographic features and mineral compositions in the along ridge axis, and then perform a three-dimensional study of hydrothermal circulation along the ridge segment structure. It is important to elucidate of the seawater penetrating depth at the oceanic crust formation, we discuss the change in the penetration depth of the seawater along axis, trying to understand of the oceanic crust formation process.