Abstract Geochemical and isotopic data are presented for ~ 32 Ma-old high-K andesites dacites from the Alpine Chain. The samples consist of plagioclase, amphibole, titanomagnetite rare biotite quartz. isotope indicate that slab-derived fluids, sediment melts presumably AFC processes involving continental crust played a key role in petrogenesis rocks. A contribution fluids is suggested based on ...

Volcanic plume composition is strongly influenced by both changes in magmatic systems and plume-atmosphere interactions. Understanding the degassing mechanisms controlling type of volcanic activity implies deciphering contributions gases reaching surface their posterior chemical transformations contact with atmosphere. Remote sensing techniques based on direct solar absorption spectroscopy prov...

The Malko-Petropavlovsk zone of transverse dislocations (MPZ) was formed on the extension deep Avachinsky transform fault in perpendicular relation to subduction trench. It is a natural boundary between variously aged slabs Kamchatka (103–105 Ma under Southern and 87–92 Eastern volcanic belt). Monogenetic cinder cones MPZ are randomly distributed along these long-lived rupture zones. Here we pr...

a r t i c l e i n f o Keywords: Large Igneous Province atmospheric carbon dioxide Triassic–Jurassic CO 2 chemical weathering Recent evidence from the ~201.5 Ma Central Atlantic Magmatic Province (CAMP) in the Newark rift basin demonstrates that this Large Igneous Province produced a transient doubling of atmospheric pCO 2 , followed by a falloff to pre-eruptive concentrations over ~300 kyr. Thi...

We use Viking and new MGS and Odyssey data to characterize the lobate deposits superimposed on aureole deposits along the west and northwest flanks of Olympus Mons, Mars. These features have previously been interpreted variously as landslide, pyroclastic, lava flow or glacial features on the basis of Viking images. The advent of multiple high-resolution image and topography data sets from recen...

Traumatized anterior teeth with subgingival fractures of the crown and root can be restored successfully after orthodontic extrusion. A technique is described which involves the use of a localized fixed appliance made of rectangular wire. The appliance is fabricated in the laboratory prior to bonding to the teeth with composite resin. The simple design of the appliance makes it easy to manage a...

Thick, slow-moving block-lava flows are associated with extrusive activity in dacitic systems, where lava-core depressurization during flow-front collapse generates devastating block-and-ash flows. Dimensional and rare thermal data collected during January 2000 for an active dacitic block flow at Santiaguito (Guatemala) provide insight into cooling and emplacement mechanisms. Flow velocity was ...

Abstract Alkaline-peralkaline igneous systems are promising sources of Rare Earth Elements (REE). Preservation bias has resulted in a gap the geological record for alkaline-peralkaline magmatic systems, with hypabyssal plumbing system linking magma chambers to extrusive volcanic rocks poorly represented. Large plutonic varieties these often proposed have fed (now eroded) volcanoes, and current ...

of maxillary molar extrusion in vertical facial development.1,2 Other reports followed,3-5 along with a cephalometric analysis centered around vertical diagnosis.6 Subsequent studies identified treatment modalities that could be used to control and, to a limited extent, reduce the vertical dimension during conventional orthodontic treatment. No investigator has published in this field as long a...

Microbial life has been detected well into the igneous crust of the seafloor (i.e., the oceanic basement), but there have been no reports confirming the presence of viruses in this habitat. To detect and characterize an ocean basement virome, geothermally heated fluid samples (ca. 60 to 65°C) were collected from 117 to 292 m deep into the ocean basement using seafloor observatories installed in...