Mario Voltaggio

Mario Voltaggio
Italian National Research Council | CNR · Institute of Environmental Geology and Geoengineering IGAG

Primo Ricercatore

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93
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January 2000 - present
Italian National Research Council
Position
  • Primo Ricercatore

Publications

Publications (93)
Article
A buried travertine deposit, identified in a well at Prima Porta (to the north west of Rome, Italy), was investigated using a multidisciplinary approach that included stable isotope geochemistry, mineralogy, petrography and radiometric dating. The travertine body is located just along the western boundary of the Tiber valley, a morpho-tectonic depr...
Article
Full-text available
A new method for estimating retardation factor and recoil constant of radium isotopes in groundwater hosted in porous aquifers is described. The method is based on the evidence that alpha-recoiled radium ions, supplied by thorium parent atoms which occur in phases immersed in NAPL (Non-Aqueous Phase Liquids), are not adsorbed on solid phases. Exper...
Book
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Natural ionizing radiation is considered as the largest contributor to the collective effective dose received by the world population. The human population is continuously exposed to ionizing radiation from several natural sources that can be classified into two broad categories: high-energy cosmic rays incident on the Earth’s atmosphere and releas...
Article
Full-text available
In the frame of Radon rEal time monitoring System and Proactive Indoor Remediation (RESPIRE), a LIFE 2016 project funded by the European Commission, the contribution of building materials of volcanic origin to indoor radon concentration was investigated. First, total gamma radiation and related outdoor dose rates of geological materials in the Capr...
Article
Full-text available
In extensional continental settings, crustal-scale normal faults can accommodate deformation and subsidence at their hanging wall via activation and deactivation of subsidiary tectonic structures. Geological data obtained from subsidiary structures are required to infer the position of the tectonic deformation during the spatial-temporal evolution...
Article
About 15 years ago, a fuelling station in Roma (Italy) was dismissed. When underground tanks were removed, a subsoil NAPL (Non-Aqueous Phase Liquid) contamination came out, showing gasoline leakage from the reservoirs. Monitoring actions took place next and only recently radon dissolved in groundwater was measured for a year and used as tracer of N...
Article
The outdoor gamma background of the historic center of Rome was studied by in situ measurements and average values of the outcropping geological formations. The survey resulted in two maps of dose equivalent rate, related to pre-anthropic and present conditions. Presently, the average of the dose equivalent rate from outdoor gamma-ray field is equa...
Article
Nowadays, the access to drinkable water becomes more and more difficult for many regions around the world and the highland of Antananarivo, Madagascar, does not escape this problem. The groundwater resources of Antananarivo region could be a solution to consider for water needs, especially during drought. Knowing the groundwater age permits to esti...
Article
A detailed geochemical study on radon related to local geology was carried out in the municipality of Celleno, a little settlement located in the eastern border of the Quaternary Vulsini volcanic district (central Italy). This study included soil-gas and terrestrial gamma dose rate survey, laboratory analyses of natural radionuclides (²³⁸U, ²²⁶Ra,...
Conference Paper
This work deals with styles and mechanisms of nucleation and development of the Amatrice Fault System (AFS), a regional intrabasinal structure running through the central part of the Amatrice Basin (central Apennines, Italy). The AFS defines a [U+F07E]10 km-long tectonic structure striking NNW-SSE and cross-cutting the late Messinian flysch sequenc...
Article
Full-text available
Pleistocene lagoonal sediments exposed in northwestern Peloponneses were dated by U/Th methods in Cladocora coespitosa and in Area sp. samples, were collected from the southern part of the Rion - Antirrion and western end of the Corinth grabens, which were both formed in the upper Pliocene. Our dating results, indicate a Tyrrhenian age, Upper Pleis...
Article
Full-text available
Grotta Romanelli, located on the Adriatic coast of southern Apulia (Italy), is considered a key site for the Mediterranean Pleistocene for its archaeological and palaeontological contents. The site, discovered in 1874, was re-evaluated only in 1900, when P. E. Stasi realised that it contained the first evidence of the Palaeolithic in Italy. Startin...
Article
Travertine sequences from petrified channels used in antiquity as water supply canals in the city of Hierapolis (Denizli, Turkey) for irrigation and domestic use were sampled and analyzed for stable isotopes composition. Data records from two channels show composite quasi-periodic variations. Radium-226 activity was measured to calculate temporal c...
Article
Work on thermal pools at Poggetti Vecchi in Grosseto, Italy, exposed an up to 3-meter-thick succession of seven sedimentary units. Unit 2 in the lower portion of the succession contained vertebrate bones, mostly of the straight-tusked elephant, Palaeoloxodon antiquus , commingled with stone, bone, and wooden tools. Thermal carbonates overlying Unit...
Article
212Pb concentration in outdoor air is closely correlated with fine suspended particulate matter in the atmosphere. Thanks to this association, this isotope can be used to trace the sinking processes of particulate matter due to the vegetation, also providing accurate estimations of the deposition velocity on foliar surfaces. This approach is partic...
Article
A case of natural intermittent flow regime (slug/churn) of a CO2-enriched spring water is discussed as an example of trigger process for the collapse of sinkholes. The hydrodynamic regime of the spring, situated in the area of S. Vittorino alluvial plain (Rieti, Italy), was investigated by monitoring acoustic emission, carrying out geochemical anal...
Article
The impact on local water resources due to fly ash produced in the Koradi and Khaperkheda thermal power plants (district of Nagpur, Maharashtra - India) and disposed in large ponds at the surface was assessed through the study of environmental variation of ratios of stable and unstable isotopes. Analyses of oxygen and hydrogen isotopes suggest scar...
Article
The living euryhaline species Cyprideis torosa (Jones) undergoes morphometric variations in size, noding and sieve-pore shape linked to the environmental salinity. In particular it is known that salinity values around 8–9 psu represent the osmoregulation threshold and also the turning point between smaller and greater valve dimensions and prevailin...
Conference Paper
In many countries, radon programmes are carried out in order to identify geographical areas (i.e., Radon Prone Areas, RPAs) where people may be exposed to high indoor radon values. Some attempts have been conducted to detailed map of RPAs by using indoor radon values and information of the sub-surface (lithology, permeability, etc.). These data are...
Article
Full-text available
The strontium isotopic ratio (expressed as 87Sr/86Sr) of groundwater represents a useful method for studying and understanding the groundwater circulations, also, the U and Ra isotopic compositions can vary as function of the groundwater residence time. This paper reports an evaluation of the probable recharge area of the Sangemini mineral water s...
Article
An increasing amount of fly ash from thermal power plants is produced in India every year. Its disposal is generally done in ponds after it is mixed together in suitable proportion of water to form a slurry. Fly ash from Koradi and Khaperkheda thermal power plants (Nagpur, Maharashtra) is commonly disposed in an area characterized by the presence o...
Article
We present new stratigraphic, palaeomagnetic, 87Sr/86Sr and 40Ar/39Ar data from a lacustrine succession of the Sulmona basin, central Italy, which, according to an early study, included six unconformity bounded lacustrine units (from SUL6, oldest, to SUL1, youngest) spanning the interval >600 to 2 ka. The results of the present study, on the one ha...
Article
Abstract Passive gas accumulators made of polydimethylsiloxane (PDMS) mixed with activated C (AC) were studied to measure their efficiency for sampling Rn in water. In this composite the water-impermeable properties of PDMS act synergistically with adsorptive properties of AC, even when the accumulators are immersed in water for many days. A series...
Article
Journal of Geochemical Exploration Volume 125, February 2013, Pages 20–33 Cover image Contribution of gamma ground spectrometry to the textural characterization and mapping of floodplain sediments M. SpadoniCorresponding author contact information, E-mail the corresponding author, M. Voltaggio CNR – Istituto di Geologia Ambientale e Geoingegneria,...
Article
During atmospheric thermal inversions, dew and hoarfrost concentrate gamma emitting radionuclides of the short-lived 222Rn progeny (214Pb and 214Bi), causing an increase in the total natural gamma background from the ground. To highlight this phenomenon, a volcanic zone of high 222Rn flux was studied during the winter season 2010–11. High-specific...
Article
A new value of half-life of (214)Pb was determined using (214)Pb-enriched radioactive sources made of polyurethane foam filters treated with Rn-enriched water. Measurements based on cumulative gamma rays countings yielded a value of 27.06 (7) min. This result is 0.17 min longer than the most recent value measured by indirect methods reported in the...
Article
Full-text available
Middle–Late Pleistocene tectonic activity has been inferred through studies on travertine deposits exposed in a tract of the hinterland Northern Apennines. A detailed study on the relationships between tectonics and travertine deposition coupled with 230Th/234U age determination of travertines at Cava Oliviera quarry, located close to Serre di Rapo...
Article
The Kenyan coast is characterized by a raised fossil reef complex cut by a series of morphological terraces. Shallow subtidal coralgal facies containing Tridacna gigas shells are found at different heights along the coast. Alpha-spectrometric U-series methods were applied to 18 T. gigas samples from different locations along this reef complex with...
Article
http://www.puglia.beniculturali.it/index.php?it/189/la-rivista-dire-in-puglia
Article
We present a new tephrostratigraphic record from the Holocene lake sediments of the Sulmona basin, central Italy. The Holocene succession is represented by whitish calcareous mud that is divided into two units, SUL2 (ca 32 m thick) and SUL1 (ca 8 m thick), for a total thickness of ca 40 m. These units correspond to the youngest two out of six sedim...
Article
Full-text available
On 6 April 2009, at 01:32 GMT, an Mw 6.3 seismic event hit the central Apennines, severely damaging the town of L’Aquila and dozens of neighboring villages and resulting in approximately 300 casualties (Istituto Nazionale di Geofisica e Vulcanologia, http://www.ingv.it; MedNet, http://mednet.rm.ingv.it/procedure/ events/QRCMT/090406_013322/qrcmt.ht...
Article
A new method for measuring H2S mass flux from the ground, based on the digital analysis of the interference colours produced by the sulphidation of copper passive samplers (CPS), is proposed and discussed in this article. CPS sulphidation has a wide range of linear responses to H2S doses and can be used together the accumulation chamber method to e...
Article
Full-text available
In this paper are presented the results of integrated investigations aimed at building a reference geological model for the seismic microzonation of Celano municipality (Central Italy). The study area is located along the northern rim of the Fucino basin, which is an intermontane half-graben filled by thick Plio-Quaternary alluvial and lacustrine d...
Chapter
Questo capitolo presenta la sintesi di uno studio a carattere multidisciplinare, condotto dai membri di numerose unità operative afferenti al progetto “GEOBASI” su campioni di suolo del sito “pilota” di Muravera, ai fini di cogliere le dinamiche interne del suolo e quelle a scala territoriale, e fornire un contributo all’individuazione di appropria...
Article
Full-text available
In January 2002, Nyiragongo volcano erupted 14–34 × 106 m3 of lava from fractures on its southern flanks. The nearby city of Goma was inundated by two lava flows, which caused substantial socioeconomic disruption and forced the mass exodus of the population, leaving nearly 120,000 people homeless. Field observations showed marked differences betwee...
Article
Ophiolitic sequences in Northern Apennines are usually exploited as source of raw material for civil engineering works. Grinding procedures of basalts imply the production of dusts with relatively high concentration of PHES. This paper studied the increase of geochemical risk when washing mud produced at Sasso di Castro quarry site (Tuscany) is reu...
Article
Biogeochemical mapping of selenium in Italian agricultural soils was accomplished by measuring the Se concentration of representative samples of wheat grains from 71 provinces. The range of the concentration values averaged on a provincial basis was 7-245 ng Se g(-1). A multiple regression model based on six geochemical and pedoclimatic variables w...
Article
Full-text available
In this presentation we underline the occurrence of syn-depositional tectonic records within Pleistocene travertines exposed in the Cava Oliviera quarry (Serre di Rapolano, Siena). Widespread fracture network and tilting of the carbonate basal succession (Succession A) exposed in the quarry are related to the activity of a normal or transtensional...
Article
Northern Latium (Italy) is an area where the Rn risk rate is potentially high because of the extensive outcropping of Neogene U-rich volcanics and the presence of major active tectonic lineaments. The lack of data on Rn risk rates in that area, which is undergoing major urban and industrial development, has prompted this study. It proposes a method...
Article
Calcareous tufa deposits occurring in the Aniene and Simbrivio Valleys (Latium, Central Italy) between Vallepietra and Mandela- Vicovaro areas have been studied by means of morpho-geological mapping, mineralogical and facies analysis, malacofauna investigation, geo-archeological research and U/Th dating. The deposits of Subiaco and Mandela-Vicovaro...
Article
The statistical technique of discriminant analysis associated with the calculation of an information coefficient has been applied to the concentrations of 37 chemical elements for calculating the mixing of stream sediments of different origin in the Mignone river basin.Discriminant analysis has been based on sample catchment basins (SCBs), defined...
Article
A large number of calcrete samples from topsoils of the Doukkâli area, western Morocco, were studied by U-disequilibrium series methods. The 230Th/234U ages are rather uniformly distributed between>350 and 2ka BP. Homologous samples for occurrence and structure display quite different ages, the 230Th/234U ages are considered apparent. This is expla...
Article
The origin of the 226Ra-excess during the last cycle of Vesuvius activity was investigated by high-resolution γ-spectrometry, TIMS and EDXRF. Lavas display high initial 226Ra-excess (500–1000%), similar (230Th/232Th) activity ratios (0.87–0.91) and most samples show significant 238U-excess. During the period 1631–1944 the initial absolute 226Ra-exc...
Article
The origin of the 226Ra-excess during the last cycle of Vesuvius activity was investigated by high-resolution γ-spectrometry, TIMS and EDXRF. Lavas display high initial 226Ra-excess (500–1000%), similar (230Th/232Th) activity ratios (0.87–0.91) and most samples show significant 238U-excess. During the period 1631–1944 the initial absolute 226Ra-exc...
Article
A method to detect the extent of rainfall-dependent erosion of CaCO3 materials, based on implantation of recoiling nuclei of U–Th disequilibrium series (UTHIRN) is outlined here. Radon chambers provided natural implantation of short and medium-lived isotopes (212Pb and 210Pb) on surfaces of natural varieties of CaCO3. Equal thicknesses of CaCO3 wer...
Article
The age and environmental impact of the gaseous discharge at Solforata of Pomezia (Alban Hills, Italy) has been investigated by the application of U-series disequilibrium methods. Chronological data of sulphide mineralization and of a phreatomagmatic deposit close to Solforata fit with a temporal window (26–47 ka BP) of intense volcanic activity wh...
Article
U-series disequilibrium radionuclides (238U,234U,210Pb,210Po) in sulphur incrustations deposited at La Fossa cone (Vulcano Island, Italy) were measured over the period 1990–1995 to collect information about changes in the feeding system of the fumarolic field. The 210Po/210Pb and 210Pb /Pb ratios of the sulphur incrustations allowed the identificat...
Article
Pleistocene sediments exposed in the western Peloponnesus were dated by Th-230/U-234 and Isoleucine Epimerization measurements in Cladocora coespitosa and in Glycymeris sp. collected samples respectively, from marine terraces in four locations within the Ellis graben which was formed in the middle Pliocene. The dating results indicate a pre-Tyrrhen...
Article
Several samples of calcites, filling fractures in a restricted area of the southern volcano deposits at Vulcano island, were investigated. Data referring to isotope composition of U, C, O, Sr and fluid inclusions, give a solution, by indirect observations, to the chronostratigraphic problem of the trachy basaltic welded scoriae blankets (WSB) outcr...
Article
The island of Ustica has been the site of coeval volcanism and transgressive–regressive marine cycles. The volcanic history can be subdivided into five periods of activity according to stratigraphical and compositional data. Basaltic magmas were extruded during most of these periods and only one period was characterized by the emplacement of trachy...
Article
Disequilibrium existing within the uranium series radioactive family (the so called ‘U-Th’ or ‘230Th’ method) can be used for chronological purposes in volcanic areas. It can be applied to volcanic rocks as well as to travertines connected to volcanic events, provided that the age of these materials (volcanics or travertines) is younger than ∼300ka...
Article
Full-text available
This paper deals with the probable recharge area of the Sangemini mineral water springs (Terni - Umbria, Central Italy) and the residence time of water in aquifers. To this purpose Sr and U-series isotopic systematic were investigated. The extension of the aquifer was constrained by coupling Sr isotopic data on waters and local geological settings....
Article
The southern and southeastern rim of the present caldera (La Fossa caldera) at Vulcano Island (Aeolian Islands, Italy) is crosscut by a network of fractures filled with calcite and minor chalcedony. Fluid inclusion studies indicate that both mineral phases were deposited from hydrothermal solutions. Several calcite samples were analyzed and their U...
Article
In the disposal of radioactive wastes, the hydrogeology and the geochemical characters of the geological formations and their long term maintenance are fundamental with regards to the mobility of the radionuclides in the geosphere. In particular the possible circulation of fluids can condition the mobility of the radionuclides in the geological for...
Article
A method for determining the ages of shoshonitic volcanics erupted within the last 5000 years is presented and assessed. This method is based on 226Ra/230Th radioactive disequilibrium and on a leaching procedure and γ-counting of volcanics containing Th-enriched, Rainitial-depleted mineral phases detected by microprobe analyses. K is used as a Ra-s...
Article
Full-text available
Chronological measurements have been carried out on speleothems from the Grotta del Fiume-Grotta Grande del Vento karst system in Frasassi (Ancona, Italy) by means of the ²³⁰Th radiometric method in order to date hypogean karst levels and related geological events. Higher levels were found to be older than the lower ones according to standstills an...
Article
230Th-238U data on late-Quaternary volcanic rock samples from the Alban Hills (Italy), originally presented at meetings in 1988, have been questioned on the basis of leucite 40Ar/39Ar data which lead to inapplicable ages attributed to the same samples. In order to address the criticism and to clarify the problem, field and laboratory evidence is pr...
Article
The geomorphological evolution of the Volturno river coastal plain between Late Mid-Pleistocene and Holocene times has been reconstructed. The recostruction in based on data from natural outcrops, data from ~ 600 existing boreholes drilled in the area and 3 new boreholes drilled in the area. The age model relies on ²³⁰Th/²³⁴U dating of fossiliferou...
Article
The input of137Cs into the troposphere from the Chernobyl nuclear accident made intriguing the use of fallout137Cs as a tool for estimating the rate of soil erosion over Europe. The present paper reports on the adoption of137Cs/134Cs activity ratio to differentiate the vertical distribution of137Cs prioir to and following the Chernobyl accident. Th...
Article
Full-text available
The Mazzano Romano manganese deposit formed during Quaternary, probably in the time interval 442 to 230 ky, by leaching of the pyroclastic rocks of the "Complesso dei tufi stratificati varicolori de La Storta', of the Roman perpotassic province of central Italy. The leaching action was prompted by the presence of a lake in the Mazzano area, and dev...