首页|Geochemistry of volcanic rocks in the Bajawa geothermal field, central Flores, Indonesia
Geochemistry of volcanic rocks in the Bajawa geothermal field, central Flores, Indonesia
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Multi-components of 46 volcanic rocks were analyzed from the Bajawa geothermal field, central Flores, Indonesia. Twenty six samples were taken from the Bajawa rift zone volcanic rocks including numerous cinder cones called the Bajawa Cinder Cone Complex. The results show that tholeiitic basalt to dacite are rather common in the field, but the Bajawa rift zone volcanic rocks are calc-alkaline andesite and extremely homogeneous throughout the samples in major and minor components. The plot of the Bajawa rift zone volcanic rocks to pseudoternary diagrams reveals that their cluster is constrained by the phase boundaries and equilibrated at about 3 kbar or 10 km depth. This depth corresponds with the bottom of the oceanic crust in this region, and the rift type magmatism might have caused such a shallow depth magma generation. The homogeneity of the Bajawa rift zone magma is ascribed to its short path from the magma source region to the surface and its non-stop rising as a dike swarm.
rift zonedike swarmcinder conegeothermal fieldcalc-alkaline andesitemulti-component analysisInie Lika VolcanoBajawaFloresIndonesia
NSTL
