Results 31 to 40 of about 2,382 (170)

The Transition From Melt Accumulation to Eruption Initiation Recorded by Orthopyroxene Fe‐Mg Diffusion Timescales in Late Holocene Rhyolites, South Sister Volcano, Oregon Cascade Range

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract South Sister volcano, Oregon Cascade Range, USA, has repeatedly erupted rhyolite since ca. 40 ka. The youngest such eruptions are the ca. 2 ka Rock Mesa and Devils Chain rhyolites, erupted several hundred years apart from two multi‐vent complexes separated by 3–6 km. Fe‐Mg interdiffusion models of orthopyroxene rims from both rhyolites produce
Nathan L. Andersen, Annika E. Dechert, Dawn C. S. Ruth, May (Mai) Sas, Julie Chouinard, Josef Dufek   +5 more
wiley   +1 more source

Hipertensión y su relación con el sodio, el potasio, el calcio y el magnesio

Perspectivas en Nutrición Humana, 2006
La presión arterial (PA) elevada es uno de los principales factores de riesgo de la enfermedad, cardiaca, cerebrovascular y renal. Su aumento se debe entre otros a factores dietéticos, genéticos y a sus interacciones, entre otros.
Gladys Velásquez de Correa, Lina Marcela López Gómez   +1 more
doaj  

Can Multiphase Inclusions in Garnet From Eclogite Facies Rocks Be a Product of Melt or Supercritical Fluid Entrapment During Subduction?

Journal of Metamorphic Geology, Volume 43, Issue 9, Page 891-908, December 2025.
ABSTRACT Dehydration of rocks and minerals during high‐pressure metamorphism is controlled by the thermal structure of the subduction zone and can be traced by the stability fields of hydrous phases. Consistent with the results of experimental works, the content of silicate components in fluids is assumed to increase from the fields of subcritical to ...
Shah Wali Faryad
wiley   +1 more source

Radiogenic Heating as the Thermal Driver of Himalayan Crustal Heating During Prolonged Thickening

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract The thermal evolution of the crust during continental collision evolves from cold to hot with time, which impacts crustal reworking and differentiation. However, it remains elusive as to the mechanism driving the crust to be hot during the protracted collision.
Shuaiqi Liu, Guibin Zhang, Lifei Zhang, Shuzhen Wang, Feng Chang   +4 more
wiley   +1 more source

Unveiling Cenozoic Volcanism in the Takab‐Shahindezh Area Induced by Slab‐Mantle Interaction in the Zagros Orogen, NW Iran

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract The Zagros orogen records the closure of the Neotethys Ocean by northward subduction of the oceanic slab beneath the Iranian plate. Northwestern Iran has undergone episodic volcanism since the Eocene, due to a shift of tectonic regimes from subduction to collision and post‐collisional extension, although the dynamics responsible for such ...
Farzaneh Shakerardakani, Wenjiao Xiao, Franz Neubauer, Xian‐Hua Li, Behzad Monfaredi, Miao Sang   +5 more
wiley   +1 more source

Intercambio cationico calcio-magnesio-sodio en algunos suelos del Valle del Cauca

Acta Agronómica, 1989
Para estudiar la influencia de diferentes cantidades de Ca, Mg y Na en las aguas de riego sobre las propiedades químicas y físicas de los suelos, se caracterizó el intercambio Ca-Mg en presencia de diferentes saturaciones de Na en la solución de ...
Torres M. Jorge Ilian, García O. Álvaro   +1 more
doaj  

Magnesio, catión esencial. Una revisión narrativa de la ingesta y recomendaciones de ingesta en varios continentes y en Venezuela

Archivos Latinoamericanos de Nutrición
Introducción. El magnesio es esencial para diversas funciones biológicas. La ausencia de biomarcadores específicos hace de su determinación un desafío.
Lusliany J Rondón
doaj   +1 more source

Rapid Incorporation of Metasediments Into Lower Crust of the Gangdese Magmatic Arc, Southern Tibet

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.
Abstract Deeply exhumed crustal terranes of continental arcs worldwide commonly contain metasedimentary components, but the nature of these lithologies and how they became incorporated into the lower crust are not fully understood. Here, we present petrological, geochemical and geochronological data from exhumed deep‐crustal metapelites and ...
Sheng‐Kai Qin, Ze‐Ming Zhang, Richard M. Palin, Xin Dong, Hui‐Xia Ding, Zuo‐Lin Tian   +5 more
wiley   +1 more source

Marcadores de estrés oxidativo en hipertensión leve

Anales de la Facultad de Medicina, 2007
Introducción: La hipertensión es un factor de riesgo cardiovascular y en 90% de los casos se desconoce el mecanismo que la inicia. Recientemente, se considera que la hipertensión es un síndrome de anormalidades metabólicas y estructurales, en el que las ...
Raquel Oré, Rubén Valdivieso, Silvia Suárez, Doris Huerta, Marco Núñez, Jorge Durand   +5 more
doaj  

Oxide Gabbros: Transformation From Oceanic Ridge‐Transform Systems to Subduction

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.
Abstract Fluid composition and fluxes in subduction zones are primarily governed by the nature and degree of hydrothermal alteration of the subducting oceanic lithosphere. However, spatial and temporal heterogeneities inherited from mid‐ocean ridge and oceanic transform fault (OTF) systems introduce significant uncertainties in constraining these fluid
Thomas Gyomlai, Cécile Prigent, Sampriti Mukherjee, Alexandre Janin, Mathilde Cannat, Saskia Erdmann   +5 more
wiley   +1 more source