[1] Although most Central American magmas have a typical arc geochemical signature, magmas in southern Central America (central Costa Rica and Panama) have isotopic and trace element compositions with an ocean island basalt (OIB) affinity, similar to the Galapagos-OIB lavas (e.g., Ba/La < 40, La/Yb > 10, Pb/Pb > 18.8). Our new data for Costa Rica suggest that this signature, unusual for a conve...

In this paper, we describe the design of a profile generator toolkit, which aims to automatically create realistic user profiles for a mobile personalized portal service. These profiles simulate actual user behavior and are utilized to experiment with a personalized crawling system, called eRACE. With the help of this tool, we will assess the performance and scalability of the eRACE system by c...

Abstract The geochemical distribution of heavy metals in peat soil profile and estimation water table patterns peatland oil palm plantation were carried out the Klias Peninsular West Coast Sabah. geological setting mainly consists Crocker Formation Quaternary Alluvium which composed soil. from 10 sites collected for analysis. geophysical surveys performed to measure table, influenced concentrat...

During Phase 1 of the Weyburn Project (2000-2004), 4D reflection seismic data were used to map CO2 migration within the Midale reservoir, while an extensive fluid sampling program documented the geochemical evolution triggered by CO2-brine-oilmineral interactions. The aim of this task (3b.11) is to exploit these existing seismic and geochemical data sets, augmented by CO2/H2O injection and HC/H...

Introduction: The current knowledge of the geological history of Venus can be interpreted in terms of the history of the geochemical environments on this planet. One can distinguish two parts of the geologic history of Venus: the later part, for which we have morphological records supplemented by geochemical measurements on the surface and in the atmosphere, and the earlier part, for which ther...

This thesis evaluates the utility of a geochemical technique for the investigation of paiaeoenvironmental change in south west England. The method, EDMA (Energy Dispersive X-ray Micro Analysis), is a rapid, non-destructive analysis tool, capable of detecting a large range of geochemical elements. This research examines the most appropriate method of sample preparation for organic soils and peat...

Analysis of the distribution of major components and heavy metals in a section of post-Jurassic deposits of southern Hess Rise (Deep Sea Drilling Project Site 465), the results of processing analytical data by factor analysis, interpretation of information on mineralogy and lithology of sediments, and evaluation of rates of component accumulation enable distinction of the main stages in the geo...