A5101981970- Geochemistry and Geologic Mapping
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Methane Hydrates and Related Phenomena
- Extraction and Separation Processes
- Geothermal Energy Systems and Applications
- Cryospheric studies and observations
- Landslides and related hazards
- CO2 Sequestration and Geologic Interactions
- Geochemistry and Geochronology of Asian Mineral Deposits
- Paleontology and Stratigraphy of Fossils
- Research Data Management Practices
- Geological Formations and Processes Exploration
- High-pressure geophysics and materials
- Impact of Light on Environment and Health
- Environmental Chemistry and Analysis
- Metal Extraction and Bioleaching
- 3D Surveying and Cultural Heritage
- Groundwater flow and contamination studies
- Mine drainage and remediation techniques
- Archaeological Research and Protection
- Remote Sensing and LiDAR Applications
- Geochemistry and Elemental Analysis
- Radioactive element chemistry and processing
Universidad Andrés Bello
2024
GFZ Helmholtz Centre for Geosciences
2014-2024
Clínica Las Condes
2018-2024
Johns Hopkins University Applied Physics Laboratory
2022
Geriatrische Gesundheitszentren
2020
University of Iceland
2018
University of Hagen
2014
Centre National de la Recherche Scientifique
2002
Université Paris Cité
2002
Hamburg University of Technology
2001
Abstract Catastrophic lava dome collapse is considered an unpredictable volcanic hazard because the physical properties, stress conditions, and internal structure of domes are not well understood can change rapidly through time. To explain locations instabilities at Merapi volcano, Indonesia, we combined geochemical mineralogical analyses, rock property measurements, drone-based photogrammetry, geoinformatics. We show that a horseshoe-shaped alteration zone formed in 2014 was subsequently...
Fissure eruptions are commonly linked to magma dikes at depth, associated with elastic and anelastic surface deformation. Elastic deformation is well described by subsidence above, uplift lateral widening perpendicular the dike plane. The part formation of a graben, bordered graben parallel faults that might express as sets fractures surface. Additionally secondary structures, like push ups, bends step overs yield information about deforming domain. such structures fissure eruptions,...
Mineral exploration targeting of orogenic gold deposits is challenging, especially in concealed terrains. To meet this challenge, a practical method using structural complexity (SC), self-organizing map (SOM) and supervised deep neural network (SDNN) proposed. As are structurally controlled, the use high-resolution aeromagnetic data order to delineate structures routinely performed by mineral explorationists. SC defined as intersection density or orientation diversity linear structures,...
Abstract The eruption frequency of geysers can be studied easily on the surface. However, details internal structure including possible water and gas filled chambers feeding eruptions driving mechanisms often remain elusive. We used a multidisciplinary network seismometers, video cameras, pressure sensors one tiltmeter to study eruptive cycle, structure, cycle Strokkur geyser in June 2018. An at always consists four phases: (1) Eruption, (2) post‐eruptive conduit refilling, (3) filling...
Fissure eruptions are associated with lava fountains which often show complex distinct venting activity, in pulsating form, and the development of characteristic morphologic expressions such as scoria or spatter cones. Most morphological studies based on observations old structures not related to direct systematic records vents rare. The 2014 - 2015 Holuhraun eruption site, Iceland, offered an exceptional opportunity study unprecedented details location evolution those cones their...
<title>Abstract</title> <bold>Background:</bold> Plant microbiota has been the subject of a great deal research in recent years. In particular, cereals is increasingly being studied order to identify bacteria that can improve plant health and growth. Barley world's fourth most important cereal crop terms agricultural production. Intensive cultivation this requires use chemical inputs compensate nutrients deficiencies soils limit pathogens. Isolating using increase bioavailability soil...
Abstract Water content plays a significant role in magma genesis, ascent rate, and, ultimately, the style and intensity of volcanic eruptions, due to its control on density, viscosity melting behaviour silicate melts. A reliable method for determining pre-eruptive magmatic water is use phenocrysts nominally anhydrous minerals (NAMs) which can preserve as hydrogen configurations structural defects. The advantage this that eruptive changes such loss during degassing may be experimentally...
Volcanic flanks subject to hydrothermal alteration become mechanically weak and gravitationally unstable, which may collapse develop far-reaching landslides. The dynamics trajectories of volcanic landslides are hardly preserved challenging determine, is due the steep slopes inherent instability. Here we analyze proximal deposits 21 July 2014, landslide at Askja (Iceland), by combining high-resolution imagery from satellites Unoccupied Aircraft Systems. We performed a Principal Component...
Abstract Calderas are subcircular depressions with near-vertical walls, which often gravitationally unstable and prone to mass movements that sequentially widen their basins. However, the details of these erosional changes difficult decipher due short observational periods. Here, we use a photogrammetric dataset nearly 80 years study landslide-prone south-eastern wall Askja caldera (Iceland). We analyzed aerial data from 1945 1987, stereo satellite 2013 2022, drone images acquired in 2019,...
Abstract. Hydrothermal alteration and mineralization processes can affect the physical chemical properties of volcanic rocks. Aggressive acidic degassing fluid flow often also lead to changes in appearance a rock, such as surface coloration or intense bleaching. Although hydrothermal have far-reaching consequences for rock stability permeability, limited knowledge exists on detailed structures, extent, dynamic that take place near venting systems. By integrating drone-based photogrammetry...
Hydrogeochemical processes associated with the potential seasonal storage of 90 °C hot water in a Lower Jurassic aquifer (Lower Sinemurian/ Hettangian stages) city Berlin, Germany, are characterized and evaluated to determine possible sources mineral precipitation resulting damage (clogging). Laboratory leaching tests material from sandstone pelitic hanging aquiclude obtained wellbore "Am Reichstag 2/98" were conducted over period 28 days under anoxic conditions. A hydrogeochemical batch...
In the latest edition of Stats, STAT!, Fralick and colleagues explain statistics behind large language models — used in chat bots like ChatGPT Bard. While these new tools may seem remarkably intelligent, at their core they just assemble sentences based on from amounts text. STAT! Large Language Models 5m 26s
A sequential extraction method was developed for pyrite-bearing (FeS2) siliciclastic rocks. The focus of this study to enhance the procedure by an improved oxidation step completely dissolve not only organic matter but also microcrystalline pyrite. In first experiment, four procedures were compared pure pyrite at temperatures 25°C and 85°C with hydrogen peroxide (H2O2) as main oxidant. It found that dissolution most effective using a mixture H2O2, ammonium acetate (NH4OAc) nitric acid (HNO3)...
Catastrophic lava dome collapse is considered an unpredictable volcanic hazard because the physical properties, stress conditions, and internal structure of domes are not well understood. To better explain locations recent instability events at Merapi volcano, Indonesia (1), we combined geochemical mineralogical analyses, rock property measurements, drone-based photogrammetry, numerical modelling. We show that a linear fissure horseshoe-shaped alteration zone formed in 2014 was buried by...
On March 19, 2021, an effusive eruption lasting for six months began in the Geldingadalir valley on Reykjanes peninsula, southwest of Iceland. This was characterised by episodic lava effusion from 2 May to 18 September and changing eruptive behaviour. Here, we analyse five such episodes 8 June 2021 using drone video data acquired over active crater lake together with volcanic tremors that were recorded a seismometer located at 5.5 km distance vent. We are thus able study each terms tremor...