Meteoric waters move along pathways in the subsurface that differ as a function of lithology because effects chemical and physical weathering. To explore how this affects stream chemistry, we investigated watersheds around an igneous intrusion Luquillo Mountains (Puerto Rico). We analyzed streams on 1) unmetamorphosed country rock (volcaniclastic sedimentary strata, VC) surrounding intrusion, 2...

Younger granite bodies form two arches, the western and eastern (WA, EA), which extend from south northwards Meatique, ophiolitic group-island arc rocks, to large older outcrop north. This paper concerns feasibility of exploration in El-Erediya-Ria El-Garah-El-Gidami-El-Missikat Y Gr regions. Fieldwork remote sensing, together with geochemical, petrochemical, mineralogical studies, are used sho...

The measured clay-water isotope fractionation for boron was applied to natural organic-rich sediments undergoing illitization. Two field areas were chosen that show illitization occurring over a range of temperatures (80–500°C). Samples representing diagenetic temperatures of illitization (80–200°C) are from the Gulf of Mexico sedimentary basin at 4 to 6-km depth in the Eocene Wilcox Fm and Jur...

Structural analysis of quartz vein systems and fluid inclusion criteria were used to distinguish five different fluid types which flowed through a segment of Palaeozoic crust in southwest England during the Variscan orogeny. Mineralogical constraints in combination with fluid inclusion thermobarometry enabled the temperature of vein formation to be estimated, and isotopic compositions of fluids...

Introduction: The Olympus Mons shield volcano on the northwestern edge of Mars’ Tharsis rise is the largest volcano in the solar system. Its volcanic history is intimately tied with the volcanic and geodynamic history of Tharsis and of Mars as a whole. Previous studies used crater counting to estimate the age of the flanks of Olympus, with typical values of ~200 Myr [1]. However, establishing t...

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...

Abstract. Recent developments in tandem laser ablation mass spectrometer technology have demonstrated the capacity for separating parent and daughter isotopes of same online. As a result, beta-decay chronometers can now be applied to geological archive situ as opposed through traditional whole-rock digestions. One novel application this technique is Rb–Sr dating Proterozoic shales that are domi...

Abstract. A validation study is conducted regarding aerosol optical size property retrievals from measurements of the direct sun beam only (without aid diffuse radiation). The focuses on using real data to test new GRASP-AOD application, which uses spectral depth retrieve total column distributions, assumed be bimodal lognormal. In addition, a set secondary integral parameters distribution and ...