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The Geological Society of South Africa – Centennial Geocongress, Johannesburg, South Africa: 261-264. Eight annual Goldschmidt Conference, Toulouse, France. and ., 1995: Tectonometamorphic and geochronologic constraints on Pan-African granulite facies metamorphic rocks in Malawi (southeastern Africa). and Bilal, E., 1996: Evolution of the hydrothermally altered carbonatite and its laterite of Lueshe (NE Zaïre) based on the behaviour of the rare-earth elements (REE). EA11 and Clauer, N., 1997: Effect of sequential leaching on the Rb-Sr, Sm-Nd and Pb-Pb systematics, and on the REE distribution of Archaean carbonates. SSAGI – South American Symposium on Isotope Geology, Sao Paulo, Brazil: 317-319. Second international meeting on Granites and associated mineralizations, IAGSM II meeting in Salvador de Bahia, Brazil: 253-254. and , 1998: Rhenium-Osmium isotopic systematics of an ancient laterite profile. Evidence from age determination of sedimentary rocks and minerals of the Neoproterozoic Una Group. 6th International Symposium on Andean Geodynamics, Barcelona, Spain. and Toulkeridis, T., 2006: Numerical analysis to design an urban tunnel in Quito, Ecuador. R., 1990: Pb-Pb dating of a carbonate rock from the Onverwacht Group, Barberton Greenstone Belt, South Africa. Are Varangian or Sturtian the glacial deposits on the Sao Francisco craton? EA16 Poulenard, J., and Poulenard, J., 1999: Evidence of pedological changes due to rapid tectonic uplift: The Oña Massif, southern part of central Ecuador. Latinamerican Congress of Soil Science, Tampuco, Chile. and ., 2000: Are mineralyzing fluids related to hydrothermal activities inducing ore accumulations ? and Medina, G., 2005: Lower Maastrichtian syntectonic sedimentation along the Sub Andean Zone and its relationship with the oceanic terrane accretionary events registered in the Occidental Cordillera of Ecuador. 16th Colloquium of African Geology, Abstract Volume II, (ed. European Clay Groups Association – Euroclay ’95, Clays and clay materials. EA9 Clauer, N., and Zwingmann, 1995: Reconstitution chimique (metaux et terres rares) de fluides de systemes failles en domaine sedimentaire a partir de l´analyse de lessivats de mineraux des epontes.

and ., 2005: Geochemical and Sr-Nd isotope ratios in flood basalts from Eritrea: evidence for temporal progression from low-Ti tholeiitic to high-Ti alkaline flood basalts in Afro-Arabian CFB province. and Clauer, N., 2010: A chemical and isotopic study of Archaean magnesite, Barberton Greenstone Belt, South Africa. and Andrade, A., 2009: Manual de procedimientos para la evaluación de la vulnerabilidad física de las infraestructuras eléctricas para cada uno de los casos tipo establecidos. and Schidlowski, M., 1990: Late Archaean Rb-Sr, Pb-Pb and Sm-Nd resetting of Early Archaean Barberton Greenstone Belt carbonates.

Blanc, 2000: Fluctuations of Caspian Sea level: Beyond climatic variations?

L., 2000: A metallogenic evolution model for the lead-zinc deposits of the Meso and Neoproterozoic sedimentary basins of the São Francisco Craton, Bahia and Minas Gerais, Brazil.

2010 Desde Julio Miembro Nacional de la Comisión de Geofísica del Instituto Panamericano de Geografía y Historia (IPGH) Sección Nacional de Ecuador 2011 Desde Marzo 2011 profesor (titular), docente investigador a tiempo completo en la Facultad de Ciencias de la Tierra y Construcción (DECTC) de la Escuela Politécnica del Ejército (ESPE).

2012 Presidente de la Sociedad Científica Ecuatoriana de Espeleología – ECUCAVE y Vicepresidente de la Unión Latinoamericana de Espeleología – ULE 2012 Lider del Grupo de Investigación Geodinámica Interna y Externa – Geo1 , Kröner, A. R., 1993: Timing of deformation of the early Archean Barberton Greenstone Belt, South Africa: Constraints from zircon dating of the Salisbury Kop Pluton. W., 2002: Shear-zone patterns and eclogite-facies metamorphism in the Mozambique belt of northern Malawi, east-central Africa: implications for the assembly of Gondwana.

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