Volcanic geology of the Setouchi volcanic rocks from Kanonji and adjacent areas, northeast Shikoku, Japan.

Quaternary Volcanism Along the Volcanic Front in Northeast Japan

Geochemical Constraints on the Origin of Volcanic Rocks from the Andean Northern Volcanic Zone, Ecuador

Whole-rock geochemical data on basaltic to rhyolitic samples from 12 volcanic centers are used to constrain the role of continental crust in the genesis of magmas formed beneath the anomalously wide subduction-related volcanic arc in Ecuador. Relatively homogeneous, mantle-like, isotopic compositions across the arc imply that the parental magmas in Ecuador were produced largely within the mantl...

petrology, mineral chemistry and tectono-magmatic setting of volcanic rocks from northeast farmahin, north of arak

introduction the study area is a small part of the urumieh-dokhtar structural zone in the markazi province, located in the northeastern part of the farmahin, north of arak (hajian, 1970). the volcanic rocks studied from the area include andesite, dacite, rhyodacite, ignimbrite and tuff of middle to late eocene age (middle lutetian to upper lutetian) (ameri et al., 2009). it seems that folding a...

Gish Bar Patera, Io: Geology and Volcanic

Introduction: Since the two Voyagers passed by Jupiter in 1979, it has been known that volcanic activity is ubiquitous on the surface of Io. With over 400 volcanic centers, Io is even more volcanically active than the earth with massive flood basalt-style eruptions and komatitite lavas a common occurrence. Additionally , some volcanoes appear to be giant lava lakes, with violent activity churni...

Groundwater in Sedimentary, Metamorphic and Volcanic Rocks