Person:
González Acebrón, Laura

First Name

Laura

Last Name

González Acebrón

URI

https://hdl.handle.net/20.500.14352/75257

Affiliation

Universidad Complutense de Madrid

Faculty / Institute

Ciencias Geológicas

Department

Geodinámica, Estratigrafía y Paleontología

Area

Estratigrafía

Identifiers

Full item page

Search Results

Now showing 1 - 9 of 9

Project number: 102
GEODIVULGAR: Geología y Sociedad
(2022) García Frank, Alejandra; Acedo Peñato, Abel; Alonso Zarza, Ana María; Alonso Recio, Carlos; Alonso García, Rocío; Armendáriz Sanz, Andrés; Berrocal Casero, Melani; Calonge García, María Amelia; Cambronero García-Miguel, Irene; Campos Millán, Eduardo; Canales Fernández, María Luisa; Carvajal de Lago, Alba María; Cervilla Muros, Miguel Ángel; Chicote Alvira, Gabriel; Chiri Pérez, Oliver; Corbalán García, Judit; Coronado Vila, Ismael; Cózar Maldonado, Pedro; del Moral González, Begoña; Díaz Megías, Isabel; Díez García, Irene Pilar; Esteve Serrano, Jorge Vicente; Fajardo Portera, Pilar; Fesharaki, Omid; Fraguas Herráez, Ángela; Galán Casado, José Miguel; Gamallo Paz, Isabel; Gamarra González, Jesus; García Peco, Víctor; Gómez Heras, Miguel; González Acebrón, Laura; Paiva Henriques, María Helena; Herrero Domínguez, Santiago; Hontecillas Tamayo, Daniel; Iglesias Álvarez, Núria; López Martín, Mª del Valle; López Martín, Pablo Santiago; Martín Aguilar, Lourdes; Martín Madrid, Yolanda; Martínez Gutiérrez, Gemma; Mateos Carralafuente, José Ricardo; Mediato Arribas, José Francisco; Molero Monsonís, Andrea; Montesinos del Valle, Mercedes; Muñoz García, María Belén; Nacenta Torres, Pablo; Navarro Terrón, Esther; Oliete Puertas, Elena; Oliva Martín, Anabel; Ozkaya de Juanas, Senay Amalia; Pérez Martín del Campo, Daniel; Portales Núñez, Killian; Rodrigo Sanz, Ana; Rodríguez García, Sergio; Rodríguez García de Castro, Isabel; Salas Herrera, Javier; Salazar Ramirez, Roselis Waikiria; Sánchez Fontela, Noelia; Torices Hernández, Angélica; Sanz Pérez, Danae; Vega Carricondo, Alejandro; Vitón García, Íñigo
Submarine metalliferous carbonate mounds in the Cambrian of the Baltoscandian Basin induced by vent networks and water column stratification
(Scientific reports, 2022) Álvaro, J.J.; Holmer, Lars E.; Shen, Yanan; Popov, Leonid E.; Pour, Mansoureh Ghobadi; Zhang, Zhifei; Zhang, Zhiliang; Ahlberg, Per; Bauert, Heikki; González Acebrón, Laura
Two massive precipitation events of polymetallic ore deposits, encrusted by a mixture of authigenic carbonates, are documented from the Cambrian of the semi-enclosed Baltoscandian Basin. δ34S (‒9.33 to ‒2.08‰) and δ33S (‒4.75 to ‒1.06‰) values from the basal sulphide breccias, sourced from contemporaneous Pb–Zn–Fe-bearing vein stockworks, reflect sulphide derived from both microbial and abiotic sulphate reduction. Submarine metalliferous deposits were triggered by non-buoyant hydrothermal plumes: plumes of buoyant fluid were trapped by water column stratification because their buoyancy with respect to the environment reversed, fluids became heavier than their surroundings and gravitational forces brought them to a halt, spreading out laterally from originating vents and resulting in the lateral dispersion of effluents and sulphide particle settling. Subsequently, polymetallic exhalites were sealed by carbonate crusts displaying three generations of ikaite-to-aragonite palisade crystals, now recrystallized to calcite and subsidiary vaterite. Th of fluid inclusions in early calcite crystals, ranging from 65 to 78 ºC, provide minimum entrapment temperatures for carbonate precipitation and early recrystallization. δ13Ccarb (‒1.1 to + 1.6‰) and δ18Ocarb (‒7.6 to ‒6.5‰) values are higher than those preserved in contemporaneous glendonite concretions (‒8.5 to ‒4.7‰ and ‒12.4 to ‒9.1‰, respectively) embedded in kerogenous shales, the latter related to thermal degradation of organic matter. Hydrothermal discharges graded from highly reduced, acidic, metalliferous, and hot (~ 150 ºC) to slightly alkaline, calcium-rich and warm (< 100 ºC), controlling the precipitation of authigenic carbonates.
Fluid migration recorded by fluid inclusions in crack-sealed quartz veins and sandstone host rock; Cameros Basin, Spain
(Journal of iberian geology, 2021) González Acebrón, Laura; López Elorza, Maialen; Mas Mayoral, José Ramón; Arribas Mocoroa, José; Omodeo-Salé, Silvia
The role of deep hydrothermal fluid circulation through fractures and their impact on the sandstone host rock is studied in an extensional sedimentary basin (Cameros Basin, Spain) affected by a post-extensional hydrothermal metamorphism. The quartzarenites of the Urbión Group constituted a hydrocarbon carrier affected by very low to low-grade hydrothermal metamorphism during Late Albian to Coniacian. This process generated abundant quartz veins and transformed the quartzarenites into quartzites. This study compares the microthermometry of the fluid inclusion asemblages (FIAs) in the veins and in the quartz grain overgrowths in the quartzites, in order to understand the behavior of the hydrothermal fluids through fractures and their effects in the host rock. Fluid inclusions in the quartz grain overgrowths contain liquid and vapor at room temperature and homogenize to the liquid (Th: 124–265 °C, H2O + NaCl system). Those of quartz veins present both liquid and vapor CO2 and an aqueous liquid phase (room temperature). Final homogenization is to the liquid (Th: 109–282 °C, H2O + NaCl + CO2, mean values of amount-of-substance fractions: 0.92, 0.01, 0.07). Large Th variation within each FIA is common, due to crack and sealing processes and to reequilibration by successive thermal pulses. In contrast, the narrow Th range in each FIA towards the top of the record indicates that these inclusions are probably not reequilibrated. Two growing stages are recognized under SEM-CL in the quartz grain overgrowths, one diagenetic and another hydrothermal, the later with FIAs showing Th similar than the veins. The results can help in the evaluation of the geo-energy resources in sedimentary basins.
Dolomite–magnesite formation and polymetallic mineralization in a rift-sag basin on the western margin of the Red Sea: Paleoenvironmental, hydrothermal, and tectonic implications
(Journal of sedimentary research, 2022) Afify, A.M.; Sanz Montero, María Esther; González Acebrón, Laura
The present study gives new insight on the formation conditions of dolomite and magnesite in an early–middle Miocene succession related to a half-graben rift-sag basin on the western margin of the Red Sea. The studied Miocene succession comprises two units of siliciclastic–carbonate rocks separated by a magnesite bed. The succession is enriched with epigenetic–supergenetic polymetallic minerals, dominated by zinc-bearing ferromanganese oxides. These represent oxidized Mississippi Valley-type deposits (MVT) formed during uplifting in late Miocene–Pliocene time. Multistage dolomitization (four dolomite types: D1–D4) and magnesite authigenesis, enhanced by tectonic uplifting and faulting related to the Red Sea rifting, have been recorded. The first dolomite phase (D1) is pervasive early diagenetic dolomicrite (replacement type), which is dominant in the lower unit. Magnesite occurs as microcrystalline aggregates exclusive to the lower unit, where its authigenesis was after D1 and before D2. Occurrence of magnesite was mostly related to a restricted environment in a sag fault-bounded basin with shallow evaporative hypersaline conditions in coastal areas. D2 dolomite occurs in the lower and upper units as replacement and/or cement type of medium- to coarse-crystalline dolomite crystals. The three magnesium-rich carbonates (D1, magnesite and D2) are related to successive events of sea-level fall and rise in mesohaline and hypersaline conditions. Enrichment of magnesite and D2 dolomite with Na (up to 2.16 wt.%) and Sr (up to 1483 ppm) supports their formation under more saline evaporative conditions if compared with D1 dolomite which was formed in near-normal sea water or mesohaline fluids. The third and fourth dolomite phases (D3 and D4) are late diagenetic pore-filling coarsely crystalline and zoned, and restricted mainly to faulted areas associated with the polymetallic ore deposits. Elemental analyses of the four dolomite phases show different chemistries, i.e., non-ferroan dolomites (D1 and D2), alternation of manganiferous and non-ferroan zones (D3) and/or ferroan-type dolomite (D4). Stable- isotope values of the four dolomite types (δ18OVPDB of –7.82‰ to –5.88‰) and geochemistry suggest involvement of shallow evaporative conditions in coastal areas, enhanced either by dry and hot climate or by hydrothermal process in their formation. Nonetheless, the localized occurrence of D3 and D4 types along the faults, their concomitant occurrence with the epigenetic–supergenetic polymetallic ore deposits, and the preservation of unaltered feldspar grains ruled out the meteoric-water interaction and reinforce the fault-controlled and deep-seated hot fluid evolution for these two dolomite types. The underlying ultramafic and serpentinite rocks along with the intercalated magnesium-rich clays and/or the modified seawater most probably played a critical role in the diagenesis and/or precipitation of dolomite and magnesite. The proposed model can contribute to better understanding the genetic mechanisms of magnesite and dolomite hosted by mixed siliciclastic–carbonate deposits and their relations with MVT mineralization conditions in rift basins.
Project number: 83
GEODIVULGAR: Geología y Sociedad
(2021) García Frank, Alejandra; Canales Fernández, María Luisa; Muñoz García, María Belén; González Acebrón, Laura; Rodríguez García, Sergio; Alonso Zarza, Ana María; Martínez Gutiérrez, Gemma; Herrero Domínguez, Santiago; Cózar Maldonado, Pedro; Calonge García, María Amelia; Gómez Heras, Miguel; Fraguas Herráez, Ángela Raquel; Henriques, María Helena Paiva; Coronado Vila, Ismael; Díaz Megías, Isabel; Alonso Recio, Carlos; Navarro Terrón, Esther; Alonso García, Rocío; Sánchez Fontela, Noelia; Gamarra González, Jesus; Mateos Carralafuente, José Ricardo; Acedo Peñato, Abel; García Peco, Víctor; Ozkaya de Juanas, Senay Amalia; Sanz Pérez, Danae; Cambronero García-Miguel, Irene; Galán Casado, José Miguel; Chiri Pérez, Oliver; Gómez-Escalonilla Canales, Víctor; Oliete Puertas, Elena; García Osuna, David; Vega Carricondo, Alejandro; Martín Aguilar, Lourdes; Carvajal de Lago, Alba María; Corbalán García, Judit; Portales Núñez, Killian; Montesinos del Valle, Mercedes; Gamallo Paz, Isabel; Armendáriz Sanz, Andrés; Vitón García, Íñigo; Salas Herrera, Javier; Cervilla Muros, Miguel Ángel; Iglesias Álvarez, Núria; Hontecillas Tamayo, Daniel; Pérez Garrido, Carlos; Fesharaki, Omid; Díez García, Irene Pilar; Rodrigo Sanz, Ana; del Moral González, Begoña; Mediato Arribas, José Francisco; Pérez Martín del Campo, Daniel; Chicote Alvira, Gabriel; López Martín, Valle; Campos Millán, Eduardo; Fajardo Portera, Pilar; Nacenta Torres, Pablo; Rodríguez García de Castro, Isabel; Salazar Ramirez, Roselis Waikiria
Project number: 50
Geodivulgar: Geología y Sociedad
(2023) García Frank, Alejandra; Acedo Peñato, Abel; Alonso Garcia, Rocio; Alonso Zarza, Ana María; Armendáriz Sanz, Andrés; Berrocal Casero, Melani; Calonge García, Mª Amelia; Cambronero García-Miguel, Irene; Campos Millán, Eduardo; Canales Fernández, María Luisa; Carvajal De Lago, Alba María; Cazorla Bermejo, Miguel; Cernadas Garrido, Antonio; Cervilla Muros, Miguel Ángel; Chicote Alvira, Gabriel; Chiri Pérez, Oliver; Corbalán García, Judit; Coronado Vila, Ismael; Cózar Maldonado, Pedro; Del Moral González, Begoña; Diaz Megias, Isabel; Díaz Olías, Ana; Díez García, Irene Pilar; Esteve Serrano, Jorge Vicente; Fajardo Portera, Pilar; Fesharaki, Omid; Fraguas Herráez, Ángela Raquel; Fuentes Rodriguez, María; Gamallo Paz, Isabel; Gamarra González, Jesús; García Martín, Gema; García Peco, Víctor; Gómez Recio, Marta; Gómez Heras, Miguel; González Acebrón, Laura; Gutiérrez Gálvez, María; Henriques, Maria Helena Paiva; Herrero Maire-Richard, Laura; Herrero Dominguez, Santiago; Hontecillas Tamayo, Daniel; Iglesias Álvarez, Núria; Martín Perea, David Manuel; Martín Aguilar, Lourdes; Martínez Álvarez, Leyre; Martínez Gutiérrez, Gemma; Mateos Carralafuente, José Ricardo; Mediato Arribas, José Francisco; Mejía Ruiz, Irene; Molero Monsonís, Andrea; Montesinos Del Valle, Mercedes; Moreno Muñoz, Alberto; Muñoz García, María Belén; Nacenta Torres, Pablo; Navarro Terrón, Esther; Oliva Martín, Anabel; Ozkaya De Juanas, Senay; Portales Núñez, Killian; Quesada García, Álvaro; Rodrigo Sanz, Ana; Rodríguez García, Sergio; Rodríguez García De Castro, Isabel; Romero García, Santiago Alejandro; Salas Herrera, Javier; Salazar Ramírez, Roselis Waikiria; Sánchez Fontela, Noelia; Sanz Pérez, Danae; Torices Hernández, Angélica; Suárez Pérez, María Gabriela; Vega Carricondo, Alejandro; Vitón García, Íñigo; Yubero Martínez, Miguel
Sedimentary evolution of tectonically-controlled Cenozoic shallow marine glaucony, fluviatile and lacustrine-palustrine deposits at Bahariya region, Egypt
(Journal of African earth sciences, 2022) Afify, A.M.; Sanz Montero, María Esther; González Acebrón, Laura; Muñoz García, María Belén
The Cenozoic basin of the tectonically-active Bahariya region (Western Desert, Egypt) contains a unique paleoenvironmental, paleotectonic and paleoclimatic record displaying a large variety of sedimentary facies, stratigraphic discontinuities, and geochemical changes. This study deals with the sedimentary evolution and tectono-stratigraphic modelling of shallow marine Upper Eocene glaucony facies (Upper Hamra Formation) that changes upward into a sequence of Oligocene continental fluviatile sandstone-calcrete (Radwan Formation) and then into Miocene lacustrine-palustrine deposits (Continental Carbonate Unit). The tectonic instability of the Bahariya basin can be deduced from occurrence of sedimentary discontinuities, development of pedogenic features, and unconformable relations among rock units. Both sedimentation pattern and facies distribution seem to have been controlled by fault activity through time. Two types of glaucony facies (pelloidal and massive smectitic glaucony) were deposited in a narrow sub-basin along main faults reaching the basin center. These faults also conditioned the deposition of the Oligocene fluviatile sandstone and Miocene lacustrine-palustrine carbonates. A transition from greenhouse (global warming event of the Middle Eocene Climatic Optimum) to icehouse climatic conditions (Eocene-Oligocene climatic cooling) is probably represented by the deposition of the shallow marine glaucony facies during the Priabonian. Semi-arid to sub-humid conditions were dominant during the formation of the Oligocene calcretes and the Miocene lacustrine-palustrine carbonates. The latter carbonate deposits consist of basal thin-bedded chert deposits displaying hydro-plastic sedimentary structures that are possibly coeval with the Miocene basaltic extrusions along faulted and low-lying areas. We conclude that both paleoclimate and intraplate tectonic activity related to the Red Sea rifting influenced the pattern of sea level, continental drainage, sedimentation rate and clastic supply since the Priabonian up to the middle Miocene in the Bahariya basin.
Fluid-inclusion petrography in calcite stalagmites: Implications for entrapment processes
(Journal of sedimentary research, 2021) López Elorza, Maialen; Muñoz García, María Belén; González Acebrón, Laura; Martín Chivelet, Javier
Fluids trapped in speleothems have an enormous potential in frontier fields of paleoclimate and paleohydrological research. This potential is, however, hampered by diverse scientific and technical limitations, among which the lack of a systematic methodology for genetically characterizing fluid inclusions is a major one, as these can have different origins, and thus, the trapped fluid (usually water), different meanings. In this work, we propose a systematic petrological classification of fluid inclusions, based on: 1) the temporal relation between fluid inclusions and the host calcite, 2) the spatial relation between fluid inclusions and the “crystallites” and crystals aggregates, and 3) the phases (water, air) trapped inside fluid inclusions. The first criterion allows dividing fluid inclusions in two main categories: primary and secondary, whose identification is critical in any research based on trapped fluids. The other two criteria allow the definition of eight types of primary and four types of secondary fluid inclusions. Primary fluid inclusions contain the drip water that fed stalagmites at the time of crystal growth, and can be intercrystalline, i.e., located between adjacent crystallites, or intracrystalline, i.e., with the fluid trapped within crystallites. We differentiate six main types among the intercrystalline fluid inclusions (elongate, thorn-shaped, down-arrow, interbranch, macro-elongate, and bucket) and other two among intracrystalline inclusions (pyriform and boudin). In primary inclusions, water is the main phase, while gas is much less abundant. The presence of gas could be related to slow drip rates or degassing in the cave, but also to later leakage due to changes in temperature and humidity often occurring during inadequate handling of speleothem samples. Secondary fluid inclusions were clearly related to younger water inlet through stratigraphic disruptions or unconformities. They are formed after water infiltration, but sealed before the renewed crystal growth. We differentiate four main types of secondary inclusions: interconnected, rounded, triangular, and vertical fluid inclusions. The identification of primary and secondary fluid inclusions in speleothems is a key for interpretation in paleoclimate studies. Integration of petrological results allow establishment of three different genetic scenarios for the formation of fluid inclusions, whose identification can be relevant because of their predictive character.
Project number: Proyecto Innova Docencia 43
Geodivulgar: Geología y Sociedad
(2020) García Frank, Alejandra; Alonso Zarza, Ana María; Canales Fernández, María Luisa; González Acebrón, Laura; Martínez Gutiérrez, Gemma; Muñoz García, María Belén; Rodríguez García, Sergio; Gómez Heras, Miguel; Calonge García, Mª Amelia; Paiva Henriques, Mª Helena; Coronado Vila, Ismael; Fraguas Herráez, Ángela; Cózar Maldonado, Pedro; Alonso García, Rocío; Alonso Recio, Carlos; Díaz Megías, Isabel; Navarro Terrón, Esther; Rico Arjona, Rocío; Acedo Peñato, Abel; Benites Cañote, Alexandra Lucytani; Berrocal Casero, Mélani; Cambronero García-Miguel, Irene; Conde Carrión, Teresa; Ozkaya de Juanas, Senay Amalia; Domínguez Valdés, Elena; Gamarra González, Jesús; García Cobeña, Josué; Hernández Paredes, Ruth; Herranz García, Sergio; Hontecillas Tamayo, Daniel; Ma, Haiqian; Martín Perea, David Manuel; Mateos Carralafuente, José Ricardo; Ortiz Lucena, Antonio; Salazar Ramírez, Roselis Waikiria; Sánchez Fontela, Noelia; Sanz Pérez, Danae; Sierra Ramírez, Nuria; García Morato, Sara; Díez García, Irene Pilar; Martín Aguilar, Lourdes; Carvajal de Lago, Alba María; Corbalán García, Judit; Chiri Pérez, Oliver; Oliete Puertas, Elena; Gonzalo Parra, Lorena; Iglesias Álvarez, Núria; Mediato Arribas, José Francisco; del Moral González, Begoña; López Martín, Mª del Valle; Pérez Garrido, Carlos; Pérez Martín del Campo, Daniel; Rodríguez García de Castro, Isabel; Rodrigo Sanz, Ana; Sarmiento Chiesa, Graciela Noemí; Ureta Gil, María Soledad; Armendáriz Sanz, Andrés; Cervilla Muros, Miguel Ángel; González Blázquez, Javier; Montesinos del Valle, Mercedes; Portales Núñez, Killian; Prieto Saiz, Irene; Salas Herrera, Javier; Vitón García, Íñigo; Gamallo Paz, Isabel; Fesharaki, Omid; Chicote Alvira, Gabriel
Con el lema “Geología para todos” el proyecto Geodivulgar: Geología y Sociedad apuesta por la divulgación de la Geología a todo tipo de público, incidiendo en la importancia de realizar simultáneamente una acción de integración social entre estudiantes y profesores de centros universitarios, de enseñanza infantil, primaria, de educación especial y un acercamiento con público con diversidad funcional.