Results 21 to 30 of about 14,984 (154)
Distribución de uranio y torio en la apófisis adamellítica de Logrosán (Cáceres, España)
Estudios Geologicos, 1986 La apófisis de Logrosán (Cáceres, España) está constituida por una adamellita y una microdamellita, ambas de dos micas. Geoquímicamente presenta un carácter marcadamente alcalino, con una tendencia silicosódica clara, y peraluminoso.
J. Guijarro Galiano +4 more
doaj +1 more source
El análisis químico de materiales geológicos
Educación Química, 2018 Se presenta una breve discusión sobre las técnicas y el esquema general del análisis químico aplicado en geoquímica de rocas. Además, se incluyen ejemplos sobre la aplicación de Muestras de Referencia Geoquímica en la calibración de nuevas técnicas y en ...
Fernando Velasco Tapia +1 more
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Boletín Geológico, 2021 The Servicio Geológico Colombiano has made available several airborne magnetometry and gamma-ray spectrometry datasets. The information was acquired in 15 blocks that cover approximately 520,000 square kilometers of Colombian territory, representing ...
Ismael Enrique Moyano Nieto +10 more
doaj +1 more source
Materiales de Construccion, 1998 A review of some relevant papers about the cutting of ornamental stones with diamond tools is presented here with the aim of being useful to the Natural Stone industries. Due to the length of this paper, it has been divided in two parts: in the first one,
L. M. Suárez del Río +3 more
doaj +1 more source
Reactivity of laser-cleaned stones to a SO2 ageing test
Materiales de Construccion, 2004 In order to study the reaction or susceptibility of Nd:YAG laser cleaned stones to polluted atmospheres, several types of stone, both cemented (limestone) and crystalline (marble, granite), were exposed to an atmosphere having simulated SO2 pollution ...
F.J. Alonso +3 more
doaj +1 more source
Mais de 30 anos de encontros de Geoquímica Ibérica: contributos do XII Congresso Ibérico de Geoquímica e a XX Semana de Geoquímica [PDF]
, 2020 O Congresso Ibérico de Geoquímica é neste momento um congresso de referência no âmbito da Geologia Ibérica, particularmente no domínio da Geoquímica. Os primeiros passos que levaram à realização deste encontro remontam ao longínquo ano de 1977, quando ...
Nogueira, Pedro +5 more
core
Materiales de Construccion, 1998 This paper follows another one published in the preceding number of this same journal, that reviewed some scientific papers on the influence of the factors of the cutting equipments (machinery, cutting characteristics, disks, etc) on the efficiency of ...
A. Rodríguez-Rey +3 more
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Journal of Fish Diseases, EarlyView.ABSTRACT Hyperostosis is a non‐pathological condition widely reported in marine teleosts, yet its developmental dynamics and underlying drivers remain poorly understood. This study investigates the ontogenetic progression and anatomical distribution of hyperostosis in Caranx hippos based on a growth series of 39 specimens collected along the Brazilian ...
Camila Vitória Gonçalves Ferreira +8 more
wiley +1 more source
GeogacetaLa erupción volcánica de 1712, de El Charco, es una de las peor conocidas de las 8 erupciones históricas de la isla de La Palma. Fue un evento principalmente estromboliano, con fases hidromagmáticas, durante el cual se abrieron múltiples bocas a lo ...
Nicolás Chicharro +3 more
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Delineation of Flow Components in a Tropical Region With Carbonate Rocks of Southeastern Mexico
Hydrological Processes, Volume 40, Issue 9, September 2026.Hydrochemistry and statistical methods help to delimit the flow components in carbonate rocks with marine intrusion. ABSTRACT This study analyses groundwater flow systems in a tropical karst aquifer of the Yucatán Peninsula, Mexico, where population growth and tourism are concerns due to increasing urbanisation.
Castro‐Zarate Martha Edith +9 more
wiley +1 more source