Results 61 to 70 of about 14,984 (154)

Variabilidad textural, mineralógica y geoquímica de la bentonita de Yuncos (Cuenca de Madrid)

Estudios Geologicos, 1993
En este trabajo se estudia la variabilidad composicional (mineralógica y geoquímica) y textural de la capa principal de bentonita (saponita) del depósito de Yuncos (Toledo), en el sector suroccidental de la cuenca de Madrid.
M. Pozo, J. A. Medina, J. Casas, A. Moreno   +3 more
doaj   +1 more source

Sargassum beaching on mangrove sediments shifts microbial and crab metabolisms and enhances blue carbon storage

Limnology and Oceanography, Volume 69, Issue 12, Page 2941-2953, December 2024.
Abstract Benthic metabolism and net carbon accumulation in mangroves sediments strongly depend on the quantity and quality of organic matter (OM) supplied, including material brought by coastal waters such as the macroalgae Sargassum spp. Mesocosms were used to assess the effect of eutrophication by Sargassum on mangrove sediments. The concentration of
Mathias Chynel, Gwenaël Abril, Mélissa Narayaninsamy, Loris Deirmendjian, Frédéric Guérin, Charlotte Dromard, Tarik Meziane   +6 more
wiley   +1 more source

Los sistemas geotermales del Pirineo central. I. Caracteres geoquímicos y fisicoquímicos de los manantiales termales

Estudios Geologicos, 1996
Las aguas de los sistemas geotermales de Panticosa, Benasque, Arties, Caldas de Bohí, Luchon y Cauterets en el Pirineo Central presentan rasgos geoquímicos similares (valores de pH elevados, bajo contenido de sólidos disueltos, muy bajas concentraciones ...
L. F. Auqué, J. Mandado, M. J. Gimeno, P. L. López, J. Gómez   +4 more
doaj   +1 more source

Patterns of Plio‐Pleistocene Ice Volume Variability Recorded by the Large‐Magnitude Explosive Eruptions From the Kamchatka‐Kurile Volcanic Arc

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 10, October 2024.
Abstract Marine fallout ash beds can provide continuous, time‐precise records of highly explosive arc volcanism that can be linked with the climate record. An evaluation of revised Plio‐Pleistocene (0–4 Myr) tephrostratigraphies from Ocean Drilling Program Sites 881, 882, and 884 confirms cyclicity of the Kamchatka‐Kurile arc volcanism and a marked ...
Susanne M. Straub, Brendan Reilly, Maureen E. Raymo, Arturo Gómez‐Tuena, Kuo‐Lung Wang, Elisabeth Widom, David Kuentz, Richard J. Arculus   +7 more
wiley   +1 more source

Especiación de tierras raras en las soluciones ácidas y neutras del sistema de drenaje del Arroyo del Val (Zaragoza)

Estudios Geologicos, 1994
Las soluciones de la cuenca de drenaje del Arroyo del Val (Zaragoza) presentan unas características geoquímicas muy diferenciadas, lo que las hace especialmente apropiadas para el estudio de diferentes aspectos acerca del comportamiento de los elementos ...
L. F. Auqué, J. M. Tena, J. M. Mandado, M. J. Gimeno, P. López Julián, A. Zamora   +5 more
doaj   +1 more source

Soil development and ancient Maya land use in the tropical karst landscape: Case of Busiljá, Chiapas, México

Soil Science Society of America Journal, Volume 88, Issue 5, Page 1561-1582, September/October 2024.
Abstract The soil mantle of the tropical karstic landscapes of Southern Mexico was shaped by specific processes of pedogenesis and long‐term human impacts of ancient Maya agriculture. To understand the interaction between natural and human‐induced soil‐forming processes in the calcareous mountains of Chiapas state, we studied soil toposequences around ...
P. García‐Ramírez, K. Guillén, S. Sedov, C. Golden, S. Morell‐Hart, A. Scherer, T. Pi, E. Solleiro‐Rebolledo, H. Dine, Y. Rivera   +9 more
wiley   +1 more source

Geoquímica Ambiental

, 2020
Divulgação Científica para a Comunidade Universidade Federal de Santa CatarinaO vídeo fala sobre a área de estudo Geoquímica ambiental, também como suas ...
Concer, Angela
core  

Metals in coastal groundwater systems under anthropogenic pressure: a synthesis of behavior, drivers, and emerging threats

Limnology and Oceanography Letters, Volume 9, Issue 4, Page 388-410, August 2024.
Abstract Submarine groundwater discharge (SGD) dynamically links land‐ and ocean‐derived chemical constituents, such as metals, in the coastal ocean. While many metals are sediment‐bound, changing environmental conditions, particularly along the coast, may lead to increased release of metals to their dissolved and more bioavailable form.
Tristan McKenzie, Amy Moody, João Barreira, Xiaoyi Guo, Anael Cohen, Stephanie J. Wilson, Murugan Ramasamy   +6 more
wiley   +1 more source

Dossier: geoquímica y perspectiva ambiental de sistemas exógenos

, 2020
El presente dossier de la Revista del Museo de La Plata reúne nueve de los artículos presentados en la V RAGSU, los cuales abordan distintas especialidades dentro de la geoquímica de la superficie.Dossier: Geoquímica y perspectiva ambiental de sistemas ...
Carol, Eleonora Silvina, Tanjal, Carolina Verónica   +1 more
core  

Enclaves con espinela-corindon·sillimanita en rocas andesítico-dacíticas (Noguera, sierra de Albarracin. Teruel)

Estudios Geologicos, 1987
En un afloramiento intrusivo, constituído por rocas dacítico-andesíticas, al W de Noguera de Albarracín, existen enclaves de rocas metamórficas con espinela, corindón, sillimanita y otros minerales.
L. F. Auque, V. Sánchez Cela, A. Aparicio   +2 more
doaj   +1 more source