Browsing División de Geociencias Aplicadas by Title
Now showing items 218-237 of 250
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Reappraisal of Los Humeros Volcanic Complex by New U/Th Zircon and 40Ar/39Ar Dating: Implications for Greater Geothermal Potential
(American Geophysical Union, 2018)"Longevity and size of magmatic systems are fundamental factors for assessing the potential of a geothermal field. At Los Humeros volcanic complex (LHVC), the first caldera-forming event was reported at 46040 ka. New zircon ... -
Recent advances in understanding the terminal Ediacaran Earth-life system in South China and Arctic Siberia
(CSIC, 2019)"The terminal Ediacaran contains dramatic changes in biogeochemical cycles, many of which are closely coupled with evolutionary transitions in the corresponding fossil records. Dynamic redox conditions may have caused a ... -
Removal of Cu, Cd, Pb and Zn from Contaminated Soil by Using Plant-Based Surfactants, Sapindus mukorossi L (Soapnut) and Acacia Concinna (Shikakai)
(IJESD, 2019)"The performance of two plant-based surfactants in the removal of heavy metals (Cu, Cd, Pb and Zn) from soil was studied ex-situ. Experimental parameters were: six soil-solution ratios (1:10, 1:20, 1:30, 1:40, 1:50 and ... -
Respuesta hidrológica en zonas urbanas ante eventos severos de tormenta aplicando modelación numérica e información SAR: Caso Los Mochis
(2019-12-13)"En años recientes, las inundaciones se han convertido en el fenómeno natural con mayor afectación a nivel mundial provocando severas pérdidas económicas. En el caso de México debido a sus características fisiográficas ... -
Riesgo por emisiones de radón en el área metropolitana de San Luis Potosí
(2015-10)"El radón (222Rn), es un gas radiactivo de origen natural, el cual aporta la mayor parte de la radiación que recibe el ser humano a lo largo de su vida; el radón no tiene olor, color ni sabor, por lo que la forma de ... -
Rock magnetism and microscopy of the Jacupiranga alkaline-carbonatitic complex, southern Brazil
(Springer, 2009)"This study of the Cajati deposit provides evidence that the ore was neither purely hydrothermal, nor volcanic in origin, as previous workers have proposed. The ores were formed from magnetite-rich magmas, hydrothermally ... -
Role of unsaturated soil above a heavily contaminated aquifer in the natural attenuation of arsenic
(EDP Sciences, 2019)"Large attenuation of arsenic is observed in a shallow aquifer in central Mexico, where the concentration decreases from 91.5 to 11.3 mg/L, over 1.3 km horizontal distance. To investigate possible mechanisms of attenuation ... -
Sand waves generation: a numerical investigation of the Infiernillo Channel in the Gulf of California
(2016-07)"The effect of the coastal geometry on sand bed forms generation has been investigated for a tidal dominated area. Different hypothetical geometries of coastal channels with flat bottoms and unlimited sediment availability ... -
Síntesis de arseniatos de calcio (Guerinita, haidingerita y farmacolita) morfológicamente similares a los encontrados en suelos contaminados
(2017)"En el acuífero somero de Matehuala y Cerrito Blanco, en el estado de San Luis Potosí, México, se han reportado concentraciones de hasta 158 mg/L de arsénico cuya movilidad ha podido ser representada por la disolución de ... -
Southward migration of magmatic activity in the Colima volcanic complex, Mexico: an ongoing process
(2015)"The Colima Volcanic Complex trends in a nearly N-S direction in western Mexico, and one of its structures, Colima volcano, is the most historically active volcano in the country. Immediately to the N, there is another ... -
Spatio-Temporal Distribution of Deep Convection Observed along the Trans-Mexican Volcanic Belt
(MDPI, 2021)"Complex terrain features—in particular, environmental conditions, high population density and potential socio-economic damage—make the Trans-Mexican Volcanic Belt (TMVB) of particular interest regarding the study of deep ... -
Statistically coherent calibration of X-ray fluorescence spectrometry for major elements in rocks and minerals
(Hindawi Publishing Corporation, 2018)"We applied both the ordinary linear regression (OLR) and the new uncertainty weighted linear regression (UWLR) models for the calibration and comparison of a XRF machine through 59 geochemical reference materials (GRMs) ... -
Subduction of the Rivera plate beneath the Jalisco block as imaged by magnetotelluric data
(2013-08)"Two magnetotelluric (MT) profiles perpendicular to the trench provide information on the subduction of the Rivera plate under the Jalisco block (JB). The geometry of the subducting slab is inferred by the anomalous conductor ... -
Sucesión de eventos y geometría de la parte central del acuífero del graben de Villa de Reyes (San Luis Potosí, México) inferida a partir de datos geoeléctricos
(2007)"El relleno sedimentario del graben de Villa de Reyes (San Luis Potosí, México) está formado por sedimentos clásticos del Cenozoico tardío que alojan al acuífero de Villa de Reyes. El estudio de las propiedades eléctricas ... -
Surface and physicochemical characterization of phosphates vivianite, Fe2(PO4)3 and hydroxyapatite, Ca5(PO4)3OH
(2009-08)"Hydroxyapatite is a calcium phosphate in the apatite group. It has numerous applications due to its particular properties including the sorption of metallic ions. This makes it useful for the treatment of contaminated ... -
The Ahualulco Volcanic Complex: Geochemistry and temporal evolution of Oligocene felsic volcanism, in the east of the Mesa Central, San Luis Potosí, Mexico [El complejo volcánico de Ahualulco: geoquímica y evolución temporal del vulcanismo félsico del Oligoceno, en el oriente de la Mesa Central, San Luis Potosí, México]
(Instituto de Geociencias, UNAM, 2023)The Ahualulco Volcanic Complex (AVC), in the southern region of the Mesa Central of Mexico, consists of a set of Cenozoic volcanic rocks, which includes andesites. The AVC was emplaced in the middle Eocene, followed by ... -
The Greater Himalayan thrust belt: Insight into the assembly of the exhumed Himalayan metamorphic core, Modi Khola valley, central Nepal
(American Geophysical Union, 2020)"Strike-parallel discontinuities within the Himalayan metamorphic core are interpreted to reflect thrust-sense movement. There is, however, disagreement on the nature and sense of movement across one such structure in ... -
The Ilopango Tierra Blanca Joven (TBJ) eruption, El Salvador: Volcano-stratigraphy and physical characterization of the major Holocene event of Central America
(Elsevier, 2019)"The Ilopango caldera is the source of the large Tierra Blanca Joven (TBJ) eruption that occurred about 1.5 ka years ago, between ca. AD270 and AD535. The eruption dispersed volcanic ash over much of the present territory ... -
The labile fractions of metals and arsenic in mining?impacted soils are explained by soil properties and metal source characteristics
(Wiley, 2020)"Isotopically exchangeable metals in soil, also termed labile metals, are reversibly bound to soil surface and are a better index of the environmental risk of the metals than are their total concentrations. In this study, ... -
The VISHMOD methodology with hydrochemical modeling in intermountain (karstic) aquifers: case of the Sierra Madre Oriental, Mexico
(2014)"Hydrogeochemistry can be studied qualitatively using graphics such as scatter plots and Piper, Durov, and Schoeller diagrams, among others, and quantitatively by applying mass balance mixing models. The VISHMOD methodology ...