During the penultimate glaciation vast areas of the Alps were glaciated, with piedmont glaciers protruding into the foreland. In the easternmost part of the northward draining valleys of the Alps, the glaciers did not reach the foreland, but formed valley glaciers confined by the mountainous terrain. This also applies to the Ybbs valley, where samples for luminescence dating out of glaciofluvia...

Introduction. Plagioclase feldspar has been identified as the dominant mineral phase in the martian crust [1-2] through analysis of Mars Global Surveyor Thermal Emission Spectrometer (TES) data. Martian meteorites , samples of isolated terrain on Mars, contain plagioclase in abundances secondary only to pyroxene. Terrestrial basalts and andesites contain primary plagioclase that is calcic-inter...

The eruptive history of Pantelleria has been marked by the eruption nine peralkaline ignimbrites, with inter-ignimbrite episodes from small, local volcanic centres. New whole-rock geochemical data are presented for seven ignimbrites and used published younger units to track compositional changes time. From ∼190 ka, silicic magmatism was dominated comenditic trachyte comendite compositions, evol...

Abstract The objective of this work was to identify microbial communities associated with the surfaces alkali feldspars and determine whether these microbes might be involved in weathering rocks for agronomic benefit. Samples were taken from profiles soils developed on a syenite, considered as raw material agromineral production, located municipality Triunfo, state Pernambuco, Brazil. Molecular...

thermal behavior of various solid feldspars are different, namely those of bivalent cations show no change in the distribution of al and si atoms, whereas feldspars of univalent cations become more disordered with raising temperature. in the latter case al atoms migrate from the sites they occupe at low temperatures and interchange positions with the si atoms. at high temperatures (but still be...

Hydrogeochemical processes occurring in contaminated groundwater and aquifer systems may reduce the sensitivity of boron isotopes as an indicator hydraulic fracturing flowback fluids (HFFF) groundwater. In this paper, based on Chaiye-1 well (the first continental shale gas northern Qaidam Basin), hydrogeochemical affecting were analyzed HFFF-contaminated Neogene (NG1 NG2) Quaternary (QG1) aroun...

Petrografi dan geokimia batuan granitoid didekati dari aspek petrografi whole-rock X-ray fluorescence (XRF) serta pemodelan data unsur utama menggunakan perangkat lunak GCDkit berbasis bahasa pemrograman R. Kelompok Gorontalo diorit-granodiorit-granit (DGG) merupakan kelompok beku plutonik bersifat menengah-asam yang dapat dibedakan jenisnya berdasarkan persentase kehadiran mineral kuarsa, alka...

The phenomenon of feldspar alteration that occurs in the interior crystals remains poorly understood. We observed experimentally water can go into orthoclase under pressures up to 600 MPa at room temperature. With increasing pressure, FTIR spectra colorless show a sharp increase integral absorbance from 1.50 cm−1 14.54 and normalized 120 cm−2 1570 cm−2; pink saturates quickly with no significan...