Cet article dŽcrit comment les nouvelles fonctionnalitŽs de la derni•re version de l'appareil Rock-Eval (Rock-Eval 6) ont permis une expansion des applications de la mŽthode en gŽosciences pŽtroli•res. Des exemples d'applications nouvelles sont illustrŽs dans les domaines de la caractŽrisation des roches m•res, de la gŽochimie de rŽservoir et des Žtudes environnementales incluant la quantification et la description des hydrocarbures dans des sols contaminŽs. ROCK-EVAL 6 APPLICATIONS IN HYDROCARBON EXPLORATION, PRODUCTION, AND SOIL CONTAMINATION STUDIESSuccessful petroleum exploration relies on detailed analysis of the petroleum system in a given area. Identification of potential source rocks, their maturity and kinetic parameters, and their regional distribution are best accomplished by rapid screening of rock samples (cores and/or cuttings) using the Rock-Eval apparatus. The technique has been routinely used for about fifteen years and has become a standard tool for hydrocarbon exploration. This paper describes how the new functions of the latest version of Rock-Eval (Rock-Eval 6) have expanded applications of the method in petroleum geoscience. Examples of new applications are illustrated for source rock characterization, reservoir geochemistry, and environmental studies, including quantification and typing of hydrocarbons in contaminated soils. El Žxito de una exploraci-n petrolera se funda en el an ‡lisis detallado del sistema de hidrocarburos en un ‡rea determinada. La identificaci-n de las rocas madre potenciales, la determinaci-n de su grado de madurez, de sus par ‡metros cinŽticos y de su distribuci-n, se llevan a cabo de mejor modo tomando como punto de partida ex ‡menes r ‡pidos de muestras de rocas (testigos o residuos de perforaci-n) por medio de la pir-lisis Rock-Eval. Se ha aplicado esta tŽcnica en rutina durante unos quince a-os y ha llegado a ser una herramienta est ‡ndar para la exploraci-n de los hidrocarburos.Se describe en este art'culo c-mo las nuevas funcionalidades de la oeltima versi-n del aparato Rock-Eval (Rock-Eval 6) han permitido una expansi-n de las aplicaciones en geociencias petroleras. Se ilustran diversos ejemplos de nuevas aplicaciones en los sectores de la caracterizaci-n de las rocas madre, de la geoqu'mica de yacimiento y de los estudios medioambientales en que se incluyen la cuantificaci-n y la descripci-n de los hidrocarburos en los suelos contaminados.
Several high‐resolution continental records have been reported recently in sites in South America, but the extent to which climatic variations were synchronous between the northern and southern hemispheres during the Late‐glacial–Holocene transition, and the causes of the climatic changes, remain open questions. Previous investigations indicated that, east of the Andes, the middle and high latitudes of South America warmed uniformly and rapidly from 13 000 14C yr BP, with no indication of subsequent climate fluctuations, equivalent, for example, to the Younger Dryas cooling. Here we present a multiproxy continuous record, radiocarbon dated by accelerated mass spectroscopy, from proglacial Lake Mascardi in Argentina. The results show that unstable climatic conditions, comparable to those described from records obtained in the Northern Hemisphere, dominated the Late‐glacial–Holocene transition in Argentina at this latitude. Furthermore, a significant advance of the Tronador ice‐cap, which feeds Lake Mascardi, occurred during the Younger Dryas Chronozone. This instability suggests a step‐wise climatic history reflecting a global, rather than regional, forcing mechanism. The Lake Mascardi record, therefore, provides strong support for the hypothesis that ocean–atmosphere interaction, rather than global ocean circulation alone, governed interhemispheric climate teleconnections during the last deglaciation. © 1997 John Wiley & Sons, Ltd.
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