Artur Ionescu

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Verified

Artur verified their affiliation via an institutional email.

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• PhD
• Researcher at Babeș-Bolyai University

Climate change, inter‐annual precipitation variability, recurrent droughts and flash flooding, coupled with increasing water needs, are shaping the co‐evolution of socioeconomic and cultural assemblages, water laws and regulations, and equitable drinking water access and allocation worldwide. Recognising the need for mitigation strategies for drink...

Pululahua is a potentially active andesite and dacite lava dome complex. This paper presents the results of a survey focused on carbon dioxide (CO2) diffuse degassing at Pululahua, which was conducted during the 2017 International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) Commission of the Chemistry of Volcanic Gases...

Passive rift systems are often characterized by CO2 degassing, witnessed by the presence of mineral and thermal springs, bubbling pools, mofetes. Despite these field manifestations, the quantitative estimation of the CO2 budget released to the atmosphere from these geodynamic structures is not well constrained. Here, we examine the chemistry of 169...

Interactions between volcanoes and glaciers provide insight to the evolution of a volcanic edifice and may be an indicator for renewed volcanic activity. At Mount St. Helens, Crater Glacier, which has formed in the volcanic crater after the eruption in 1980, is one of the world’s last expanding glaciers and provides a unique opportunity to characte...

Glaciovolcanic caves are subglacial voids formed due to thermal gradients between the lithosphere and the cryosphere (volcano-ice interactions). These caves may be potential analogues for cryospheric settings elsewhere in the solar system. Here, biological cycles may approach the timescales of geological processes such as glaciation and volcanism....

The Massif Central, located in central-southern France, is characterized by the presence of deep CO2-rich hydrothermal systems generally hosted by the rocks of the crystalline basement. The surficial manifestation consists in bubbling pools, mofettes and a huge number of CO2 rich springs, both thermal and fresh. Since the ’70, the area has been ext...

In karst areas, anthropogenic contaminants reach the subsurface with detrimental effects on the groundwater ecosystem and downstream springs, which often serve as drinking water sources for the local human communities. We analyzed the water chemistry and microbial community composition in upstream and downstream locations of five hydrokarst systems...

Duvalo “volcano” is a site of anomalous geogenic degassing close to Ohrid (North Macedonia) not related to volcanic activity, despite its name. CO2 flux measurements made with the accumulation chamber (321 sites over ~50,000 m2) showed fluxes up to nearly 60,000 g m-2 d-1, sustaining a total output of ~67 t d-1. Soil gas samples were taken at 50 cm...

Thermal gradients between the lithosphere and the cryosphere drive the speleogenesis of glaciovolcanic caves, a physical setting existing elsewhere in the solar system. We present multi-year survey data from extensive glaciovolcanic cave systems of the Cascade Volcanic Arc, demonstrate how these caves transport heat and water, and illustrate the co...

Late Miocene to Pleistocene volcanism within the Vardar zone (North Macedonia) covers a large area, has a wide range in composition, and is largely connected to the tectonic evolution of the South Balkan extensional system, the northern part of the Aegean extensional regime. The onset of the scattered potassic to ultrapotassic volcanism south from...

We report on the results of an extensive geochemical survey of fluids released in the Vardar zone (central-western Serbia), a mega-suture zone at the boundary between Eurasia and Africa plates. Thirty-one bubbling gas samples are investigated for their chemical and isotopic compositions (He, C, Ar) and cluster into three distinct groups (CO2-domina...

The crater of Mount St. Helens hosts one of the last advancing glaciers in the world, representing a unique natural laboratory to study volcano-ice interactions. The recent eruption cycles of the volcano have been investigated to some extent, and particularly the effects of the 2004-2008 lava dome formation were closely studied. However, subsequent...

Glacial ice mantles some volcanoes at high latitudes or altitudes. In these settings, thermal flux at the ice-rock boundary forms glaciovolcanic caves. The morphology of these caves balances ice accumulation and ablation, the movement of glacial ice, volcanic heat flux, and liquid and gas flow through interconnected voids. These caves are an unders...

The Apuseni Mountains are located between the large geothermal area of the Pannonian Basin and the low thermal flux Transylvanian Basin. Thermal and mineral waters have been sampled from 42 points along a NW-SE transect. The general chemistry and the water isotope (deuterium and oxygen-18) composition were analyzed. Most of the thermal aquifers are...

https://meetingorganizer.copernicus.org/EGU2020/EGU2020-13101.html

Ursu Lake is located in the Middle Miocene salt deposit of Central Romania. It is stratified, and the water column has three distinct water masses: an upper, freshwater‐to‐moderately saline stratum (0–3 m), an intermediate stratum exhibiting a steep halocline (3–3.5 m), and a lower, hypersaline stratum (4 m and below) that is euxinic (i.e. anoxic a...

The Apuseni Mountains have a particular geological structure which gives distinctive geothermal features. They are located between the well-developed geothermal zone of the Pannonian Basin, and the Transylvanian Basin, which is a cold zone. Little information is available in the literature about the geothermal systems from this region. The synthesi...

Ciomadul is the youngest volcano in the Carpathian‐Pannonian Region, Eastern‐Central Europe, which last erupted 30 ka. This volcano is considered to be inactive, however, combined evidence from petrologic and magnetotelluric data, as well as seismic tomography studies, suggests the existence of a subvolcanic crystal mush with variable melt content....

Sulfur Cave (Puturosu Mountain, Romania) is an extreme environment, unique for displaying life in a gas chemocline. The lower part of the cave is filled with CO2, CH4, and H2S of mofettic origin, while the upper part contains air that floats above the heavier volcanic gasses. S° and H2SO4 (from sulfur-oxidation) cover the cave wall at and below the...

Ciomadul volcano is the youngest volcano within the Carpathian-Pannonian Region. Its last eruption occurred 32 ka ago and resulted in the formation of St. Ana crater, that hosts a lake with a surface area of 22 ha, a maximum depth of ∼7 m and 12 m thick sediments. This volcanic area is characterized by intense cold gas emissions in the form of bubb...

Recent studies have revealed the qualitative and quantitative importance of the free gas emanations from aqueous environments and from soil surfaces in Romania. Interesting mixing zones of different gases can be observed on the boundary between the Miocene sedimentary deposits and Late Miocene volcaniclastics. This study presents the results of inv...

Seeps are the expression of the migration of hydrocarbons from subsurface accumulations to the surface in sedimentary basins. They may represent an important indication of the presence of petroleum (gas and oil) reservoirs and faults, and are a natural source of greenhouse gas (methane) and atmospheric pollutants (ethane, propane) to the atmosphere...

Romania is one of the countries with the largest number of surface hydrocarbon seeps in the world. Seeps may be an important tool for petroleum exploration as they can provide useful information regarding source rock maturity, reservoir quality, and secondary gas alterations. Seeps also represent an important source of methane, ethane, and propane...

We provide the first high-resolution CO2 flux data for the Neogene to Quaternary volcanic regions of the entire Carpathian-Pannonian Region, Eastern-Central Europe, and estimate the CO2 emission of the seemingly inactive Ciomadul volcanic complex, the youngest volcano of this area. Our estimate includes data from focused and diffuse CO2 emissions f...

The paper presents the first systematic geochemical study on the content of natural gas (methane, heavier alkanes, CO2), and isotopic composition of methane dissolved in natural springs in Romania, from various tectonic and geological settings. The dissolved methane concentrations in the investigated areas range between 0.08 and 16,359 μg/L. Based...

Life Cycle Assessment (LCA) is a methodology that can be used to evaluate the environmental performance of municipal solid waste management systems (MSWMS). Despite of Waste Directive provisions, this methodology is insufficiently applied as a decision-support method able to identify the best option for the waste management in Romania. In this pape...

We show the results of a study on the volatiles dissolved in mineral waters discharged over a 200 km-long transect along the Rodna-Bârgău area and Călimani-Gurghiu-Harghita volcanic chain (Eastern Carpathians, Romania). All of the collected mineral water samples carry dissolved gas with carbon dioxide content up to 1.99 cm³STP/gH2O, and helium cont...

The Ciomadul, located in the South Harghita Mountains (Eastern Carpathians, Romania) is the youngest volcano built by the Neogene volcanism in the Carpathian-Pannonian Region. The volcanic activity was characterized by an initial extrusive lava dome building period from about 200 ka to 100 ka followed by a more explosive eruption stage from 57 to 3...

Methane flux measurements from surface gas manifestations and springs at the Ciomadu post-volcanic area are reported. These data contribute to extend the Romanian data-set on geological emissions of greenhouse gas to the atmosphere. A total of 46 sites were investigated for methane flux, dissolved methane content and stable carbon isotopic ratio of...

Due to the intense tectonics connected with the Carpathian orogenesis and the post-orogenetic uplift of the Transylvania basin, numerous hydrocarbon seepage systems developed in Romania, making this country one of the areas of the world with the largest concentration of surface hydrocarbon seeps. In order to evaluate the statistical occurrence of t...

The municipal waste landfills are known as important anthropogenic sources of methane and carbon dioxide being the most important greenhouse gases. The present study estimates the methane and carbon dioxide emission from the municipal open dump landfill of Cluj-Napoca (Romania). Two different methods were used: the first method was based on in situ...

Hypersaline meromictic lakes are extreme environments in which water stratification is associated with powerful physicochemical gradients and high salt concentrations. Furthermore, their physical stability coupled with vertical water column partitioning makes them important research model systems in microbial niche differentiation and biogeochemica...

Relatively often, the hydrocarbon reservoirs are not completely sealed, thus permitting the channeling to the surface of various amounts of gas, mainly consisting of methane and homologues. When important volumes of gas are released, features as mud volcanoes and everlasting fires may occur. When the gas amount is low, the degassing can be revealed...

The paper describes the gas emitting features from the Moldavian Platform, including the first direct measurements of the methane flux from geologic sources in this region. The gas is released from relatively small mud volcanoes and seepage areas, most of them currently exhibiting a weak activity. The mud volcanoes are often covered by a crust of d...

Metal-catalyzed CO2 hydrogenation is considered a source of methane in serpentinized (hydrated) igneous rocks and a fundamental abiotic process germane to the origin of life. Iron, nickel, chromium, and cobalt are the catalysts typically employed in hydrothermal simulations experiments to obtain methane at temperatures >200°C. However, land-based p...

The region of Vrancea is well known for its gas seeps (everlasting fires, mud volcanoes). In many sites the methane leaks into the atmosphere through faults or fractures. A soil gas survey has been carried out in four sites, where methane and carbon dioxide fluxes have been measured. These sites are: Lepsa, Andreiasu, Raiuti and Lopatari. The curre...

The Transylvanian Basin is well known for its large and good quality methane deposits. In many sites, these accumulations are not completely sealed and methane leaks into the atmosphere through faults or fractures. A soil gas survey was carried out after a rainy season at Sarmasel, the largest methane seepage in Transylvania. This study presents th...

14 commercial tea herbs assortments Na, K, Li, Rb, Sr, Ba Fe, Cu, Mn, Pb, Zn, Mg, Ca, Ni, Cd and Co content has been quantified by flame atomic emission and absorption spectrometry. About 2 g of dried samples were digested using the standard wet-digestion (HNO 3 and HClO 4) method. The metal content of the herbs ranges in the mg/g levels, despite o...