Abstract The transport and degassing pathways of volatiles through large silicic magmatic systems are central to understanding geothermal fluid compositions, ore deposit genesis, volcanic eruption dynamics impacts. Here, we document sulfur (S), chlorine (Cl), fluorine (F) concentrations in a range host materials eruptive deposits from Taupō volcano (New Zealand). Materials analysed groundmass g...

Abstract The Takidani pluton (1·1–1·6 Ma) represents a shallow magmatic reservoir at the base of an exhumed caldera floor. deposits two large caldera-forming eruptions, Nyukawa Pyroclastic Flow Deposit (1·76 Ma; crystal-rich dacite) and Chayano Tuff Ebisutoge Deposits (1·75 sequence crystal-poor rhyolite), are distributed concentrically around pluton. We use major trace element chemistry whole-...

Abstract The South Eastern Futuna Volcanic Zone (SEFVZ; 50 km × 80 km) is located in the NW of Lau back-arc basin at northern boundary and YAO microplates. Fatu Kapa an area (∼15 10 diffuse volcanic activity center SEFVZ intersection two axes with fracture zone. At this place, volcanic, tectonic, hydrothermal activities are enhanced. most differentiated series whole region found area. Based on ...

Abstract The late-tectonic 511.4 ± 0.6 Ma-old Nomatsaus intrusion (Donkerhoek batholith, Damara orogen, Namibia) consists of moderately peraluminous, magnesian, calc-alkalic to calcic granites similar I-type worldwide. Major and trace-element variations LREE HREE concentrations in evolved rocks imply that the fractionated mineral assemblage includes biotite, Fe–Ti oxides, zircon, plagioclase mo...

Ciomadul is the youngest volcano in eastern-central Europe. Although its last eruption occurred at ca. 30 ka, there are independent indications for a high-crystallinity magma reservoir persisting beneath until present. In order to further test hypothesis of long-lived melt presence and better constrain nature timescales associated with subvolcanic storage system, over 500 zircon U-Th U-Pb spot ...

sarbisheh mineral occurrence is located in the vicinity of the tourshab village about 50 km south of birjand, the center of southern khorassan province, east iran. the predominant geologic characteristics of the region are highly-tectonic deformation, and intrusive, granodiroritic-dioritic, to volcanic, dacitic-andsitic rocks associated with broad alteration. to the northern part of the studied...

Abstract The nature of sub-volcanic alteration is usually only observable after erosion and exhumation at old inactive volcanoes, via geochemical changes in hydrothermal fluids sampled the surface, relatively low-resolution geophysical methods or can be inferred from erupted products. These are spatially temporally removed real subsurface thus provide indirect information. In contrast, ICDP dee...

The martian surface features abundant volcanoes and evidence for past liquid water. Extant or relict martian volcanic hydrothermal systems have therefore been sought in the pursuit of evidence for habitable environments1. The Mars Exploration Rover, Spirit, detected deposits highly enriched in silica with accessory minerals, suggesting formation by hydrothermal leaching of basaltic rocks by low...

Andesitic pumice erupted in 1985 from Nevado del Ruiz volcano (Colombia) has been magnetized in opposite direction t o the present geomagnetic field. This self-reversal is probably due t o an exchange mechanism between two phases of the haematite-ilmenite series, which is similar to the magnetic coupling observed in synthetically grown antiferromagnetic-ferromagnetic FeMn-FeNi films produced un...