Introduction. About 100 m of impactites (suevitetype breccias) have been drilled at the ICDP drill site Yax-1 within the Chicxulub impact structure (see [1] for more information). Post-impact hydrothermal alteration including alkali metasomatism and devitrification of impact melt glass has significantly modified the mineralogy and chemistry of the impact breccia lithologies. Hydrothermal altera...

The Thames tidal defences are the UK’s most complex and costly flood defence system and of global significance both as a feat of engineering and in terms of the value of assets protected from flooding. The system includes 200km of dikes on the Thames Estuary and the Thames Barrier, built in the 1970s to protect against a storm surge with an annual probability of 0.001 in 2030. Planning is now u...

Abstract The exposed rocks in Abu Hawis area, North Eastern Desert (NED), Egypt, consist of tonalite-granodiorite and monzogranite, dissected by post-granite felsic (microgranite rhyolite) mafic (basaltic-andesite) dikes. investigated radioactive minerals Zr-, Nb-, REE-bearing were restricted to dikes having E–W NE–SW trends. Uraninite, uranothorite, thorite occur as the main microgranite dikes...

Numerical and Experimental Investigation of the Effect Spur Dikes Placement Position on Hydraulic Erosion Conditions Lateral Intakes

Failure to consider the costs of adaptation strategies can be seen by decision makers as a barrier to implementing coastal protection measures. In order to validate adaptation strategies to sea-level rise in the form of coastal protection, a consistent and repeatable assessment of the costs is necessary. This paper significantly extends current knowledge on cost estimates by developing – and im...

introduction mineral composition is sensitive to variations in the composition of the magma and can be used to characterize the physical conditions of crystallization such as temperature, pressure, oxygen fugacity and water content. the studies have demonstrated that geobarometery by amphibole provides a tool for determining the depth of crystallization and knowledge of the depth of crystalliza...