Geocronología y características geoquímicas de un conjunto de domos riolíticos terciarios en el Campo Volcánico de San Luis Potosí, México

Torres-Hernández, José Ramón; Siebe, Claus; Aguillón‐Robles, Alfredo; Rodríguez-Ríos, Rodolfo

doi:10.18268/bsgm2014v66n1a13

Cited by 8 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The Cenozoic magmatism in the area occurs as Oligocene hypabyssal and volcanic rhyolites and dacites, and minor granodiorite [4][5][6] ( Figure 2). Oligocene rhyolites in this region constitute a part of the San Luis Potosí Volcanic Field, and are typically highly evolved and fluorine-rich (topaz-bearing) rocks, hence the hydrothermal tin mineralization that is commonly associated with them [2,[20][21][22][23][24][25].…”

Section: Local Geology and Fluorite Depositsmentioning

confidence: 99%

“…It is likely that fresh meteoric water carried fluorine in solution by means of its interaction with the local hypabyssal and volcanic rhyolites, which were F-rich [2,[20][21][22][23][24][25]. Although no relevant concentrations of fluorine have been detected in rhyolites of the study area (see the data for Río Verde in Reference [20], but these refer to a sole sample that is not representative of the broad extent of Oligocene volcanism in the region (see Figure 2)), such contents can be over 0.3% in Oligocene topaz rhyolites in central Mexico [20,21].…”

Section: Sources For Mineralizing Fluids Their Evolution and Likelymentioning

confidence: 99%

See 1 more Smart Citation

Giant Fluorite Mineralization in Central Mexico by Means of Exceptionally Low Salinity Fluids: An Unusual Style among MVT Deposits

et al. 2019

View full text Add to dashboard Cite

The origin of the mineralization at the world-class Las Cuevas (the largest single fluorite deposit in the world) has been historically disputed, essentially between skarn-related and Mississippi Valley Type (MVT) models. A systematic study of fluid inclusions in these deposits revealed that they were formed by low temperature (49 to 177 °C) and low salinity (0 to 1.9 wt % NaCl equiv) fluids. The obtained δ13C (between −2.39 and 0.20‰ VPDB) and δ18O (between −14.03 and −7.37‰ VPDB) data from local host limestones agreed with regionally representative values in the literature. The obtained δ13C (between −15.60 and −12.99‰ VPDB) and δ18O (between −5.56 and −1.84‰ VPDB) data from hydrothermal calcite associated with fluorite mineralization indicated that the isotopic composition of hydrothermal fluids initially reflected buffering by the host rocks, and then recorded the interaction between meteoric water and basinal brines. It is likely that such processes occurred with concurrent maturation of organic matter, and that the obtained compositions may also have recorded a thermal effect on the local limestones. Halogen geochemical studies in inclusion fluids showed a distribution that suggests that solutes in mineralizing fluids were due to scavenging of Na+ and Cl− through water–rock interaction or halite dissolution, and that secondary sources would have been the evaporation or infiltration of seawater. The basinal brines with which the formation of these deposits was associated were massively diluted by deeply evolved meteoric water, thus making a significant fluorine input by basinal brines unlikely. Fluorine would have been provided by local groundwater through its interaction with Oligocene topaz rhyolites and other F-rich volcanic and hypabyssal rocks. Such a possibility is supported by present-day groundwater, which presents a regional endemic case of fluorosis. The precipitation of fluorite is possible at low temperatures (at which the solubility of this mineral is very low) by means of chemical reactions and physical interactions among very diluted F-poor basinal brines, F-rich groundwater, and host carbonate rocks. The latter systematically experienced hydrothermal karstification, which would have provided Ca2+ for reaction with F− and resulted in the precipitation of fluorite. This scenario stands for a depositional model that recalls those proposed for MVT and associated industrial mineral deposits, but is distinct from common models with regard to the primal source for fluorine and the extremely low salinities of inclusion fluids.

show abstract

Section: Local Geology and Fluorite Depositsmentioning

confidence: 99%

Section: Sources For Mineralizing Fluids Their Evolution and Likelymentioning

confidence: 99%

Giant Fluorite Mineralization in Central Mexico by Means of Exceptionally Low Salinity Fluids: An Unusual Style among MVT Deposits

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Esta unidad calcárea arrecifal subyace a su vez esta forma discordante a los depósitos de turbiditas formados por arenisca y lutita de la Formación Cárdenas del Campaniano-Maestrichtiano. Rocas volcánicas de composición andesítica del Oligoceno, cubren a las unidades Cretácicas; estas rocas volcánicas tienen espesores de aproximadamente 140 m (Labarthe et al, 1982;Torres-Hernández et al, 2014).…”

Section: Geología E Hidrogeologíaunclassified

Metodología polínica ambiental (MEPAM) para estudios hidrogeológicos en zonas cársticas. Caso Joya de Luna-Guaxcamá, S.L.P.

Torres-Rivera¹,

Ramos-Leal²,

Rodríguez‐Robles³

et al. 2019

revmexcg

View full text Add to dashboard Cite

mays, Avena sativa, y Cicer arietinum. El polen de la familia Quercus sp., propio de la zona montañosa, se detectó en las muestras de tres puntos de la zona de recarga y siete puntos de la zona de descarga. ABSTRACT Extensive outcrops of folded limestone rocks forming mountainous systems with intense karst development are found in areas of centralMexico. An important part of the water supply in these areas is derived from aquifers controlled by the karst system. We analyzed the underground flow between the towns of Joya de Luna (in an elevated part of the mountain) and Guaxcamá, topographically lower, to establish if there is a connection between these zones, and corroborate if the water infiltrated in the upper part is captured in lowland springs. A new method is proposed to qualitatively assess the hydraulic connectivity between the recharge and discharge zones in a karst and fractured system using pollen grains as tracers. Deuterium and oxygen-18 isotopic data were used to compare and evaluate the suitability of this method; in addition, excess deuterium was used as a factor in the hydrogeological analysis. Through a survey of the vegetation present within a 5 km radius in both zones, the pollen families existing in the recharge zone Joya de Luna and the discharge zone in Guaxcama were documented, and a database with 41 pollen species was generated for morphological characterization. Subsequently, 135 groundwater samples with suspended pollen grains were collected from 5 water wells in the recharge zone and 10 water springs in the discharge zone. The species analysis showed that pollen grains of Zea mays, Avena sativa, Cicer arietinum y Quercus sp., characteristic only of the recharge zone, were also present in water samples collected in the discharge area. The pollen-based results were consistent with those obtained with isotopic data; they allowed identifying two routes with hydraulic connection, G1

show abstract

“…A grandes rasgos, en la Mesa Central (MC) el volcanismo riolítico se manifiesta principalmente como rocas calcoalcalinas potásicas, muy silícicas (>76 %), emplazadas entre el Eoceno medio y el Oligoceno tardío (Orozco-Esquivel et al, 2002;Aguillón-Robles et al, 2012). Localmente, se presentan como domos topacíferos enriquecidos en flúor y estaño, los cuales provienen de lavas subalcalinas, hiperaluminosas (p.ej., domos El Tepetate, Cerro Silva y El Gato, en el oeste del campo volcánico de San Luis Potosí; Aguillón-Robles et al,1994;Orozco-Esquivel et al, 2002;Rodríguez-Ríos et al, 2007;Torres-Hernández et al, 2014), o ligadas a flujos de lava basáltico o andesítico, constituyendo un volcanismo bimodal en la región meridional de la Mesa Central. Tal es el caso de algunos complejos del campo volcánico de San Luis Potosí (CVSLP) y de la Riolita La Herradura, que contiene granate almandino, asociados a un régimen de intraplaca (Sieck et al, 2019).…”

Section: Introductionunclassified

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

Latorre-Correa¹,

Dávila-Harris²,

Aguillón‐Robles³

et al. 2023

revmexcg

View full text Add to dashboard Cite

El complejo volcánico de Ahualulco (CVA), en la región meridional de la Mesa Central de México, consta de un conjunto de rocas volcánicas cenozoicas que incluye andesitas emplazadas en el Eoceno medio, seguidas de lavas dacíticas y riolíticas, al igual que secuencias piroclásticas félsicas emitidas durante el Oligoceno, algunas de las cuales contienen granate. En este trabajo se ha encontrado que, al menos, un segundo evento andesítico (andesita Petronilas) ocurrió en ese lapso, y que estuvo ligado a la génesis de la ignimbrita Cortes (de composición riolítica), conformando así un volcanismo bimodal “atípico” evidenciado por las relaciones de campo, mineralogía, correlación de los elementos incompatibles Th y Nb y los patrones de las tierras raras. Adicionalmente, se obtuvieron nuevas edades de cristalización de zircón por el método U-Pb para la Riodacita Zapatero (31.7 Ma), la Riolita Los Cuervos (30.8 Ma), la riolita granatífera El Arenal (31.4 Ma) y el pórfido riolítico El Negro (31.1 Ma). Posiblemente, el emplazamiento de la suite bimodal, así como el de las rocas encontradas en el norte, es de tipo fisural asociado a las fallas NW-SE originadas en el régimen extensivo que ocurrió entre el Oligoceno y el Mioceno. Sin embargo, en el centro del CVA se requiere de una historia eruptiva similar a la de las calderas de colapso para explicar ciertos hallazgos litológicos y estratigráficos, como la presencia de grandes brechas, con abundantes clastos graníticos y de rocas sedimentarias basales del Cretácico, en las tobas Palos Colorados y Hienera.

show abstract

Geocronología y características geoquímicas de un conjunto de domos riolíticos terciarios en el Campo Volcánico de San Luis Potosí, México

Cited by 8 publications

References 30 publications

Giant Fluorite Mineralization in Central Mexico by Means of Exceptionally Low Salinity Fluids: An Unusual Style among MVT Deposits

Giant Fluorite Mineralization in Central Mexico by Means of Exceptionally Low Salinity Fluids: An Unusual Style among MVT Deposits

Metodología polínica ambiental (MEPAM) para estudios hidrogeológicos en zonas cársticas. Caso Joya de Luna-Guaxcamá, S.L.P.

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

Contact Info

Product

Resources

About