Lucian Petrescu

Lucian Petrescu
University of Bucharest | Unibuc · Department of Mineralogy

About

25
Publications
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390
Citations

Publications

Publications (25)
Article
Full-text available
Subduction of lithospheric plates at convergent margins leads to transport of materials once close to or at the surface of Earth to great depths. Some of them later return to the surface by magmatism or degassing, whereas others end up being stored in the mantle for long periods of time. The fate of carbon-bearing minerals in subduction is of parti...
Preprint
Full-text available
This paper recommends maize stalk as a cheap natural ion exchanger. Ion exchange equilibrium wasstudied using thermodynamic and kinetic models. The results showed a high selectivity towards cationicspecies of antimony (III), molybdenum (VI), lead (II) and arsenium (III). Waste waters and sediments fromtailing ponds samples were analysed
Article
Full-text available
U-Th-Pb chemical dating is a suitable technique for determining ages of minerals (e.g., uraninite, 13 monazite) that have large amounts of U and/or Th such that the radiogenic Pb can be measured. 14 We investigate the chemical age of bitumen-supported uraninite from the vein-type Crucea 15 uranium deposit, which is located in the Tulghes Series bas...
Conference Paper
Full-text available
Several important observations motivated this research such as followings: - apatite is a powerfull geochemical and petrologic tool in terrestrial and extraterrestrial environments including biology and medicine (e.g. Elements, 11, 3, 2015); - apatite is ubiquitous in the magmatic and hydrothermal Miocene products (minerals, rocks and ore deposits)...
Presentation
Full-text available
This poster presentation stand for a long story which have to come in the near future about magma dynamics in the MASH zone and upper magma chambers to shallow subvolcanic and eruptive activity together with the Alpine epithermal, porphyry copper and skarn deposits associated, but also in the old geodynamic terrains down to Precambrian. This is bec...
Article
Full-text available
14 15 The Quaternary Persani volcanic field (PVF) consists of alkali basalts formed in an extensional 16 basin at the SE end of the Transylvanian basin, near an important anomaly in the European 17 mantle, the Vrancea slab, a seismically active near-vertical lithospheric fragment of debated 18 origin. The PVF is the only basaltic field regionally,...
Article
Ferruginous stromatolites occur associated with Middle Jurassic condensed deposits in several Tethyan and peri‐Tethyan areas. The studied ferruginous stromatolites occurring in the Middle Jurassic condensed deposits of Southern Carpathians (Romania) preserve morphological, geochemical, and mineralogical data that suggest microbial iron oxidation. B...
Article
Temporal trends in granitoid chemistry and thermometry constrain major global changes in magmatism, tectonism or crustal thickness in the continents. Our study relies on zircon geochronology and trace element geochemistry on four new detrital rocks (two modern sediments and two Archean metasedimentary rocks) and a global compilation of published si...
Poster
Full-text available
Clathrasil -lke precipitate in fluid and hydrosaline melt inclusions after entrapment.
Poster
Full-text available
The poster present observations microthermometry and Raman spectroscopy about a solid coarsened silicate phase in aqueous and hydrosaline melt inclusions
Conference Paper
Full-text available
Clathrasil-like precipitate in fluid and hydrosaline melt inclusions after entrapment.
Article
Full-text available
We performed a detrital zircon (DZ) U-Pb geochronologic survey of the lower parts of the Danube River approaching its Danube delta- Black Sea sink, and a few large tributaries (Tisza, Jiu, Olt and Siret) originating in the nearby Carpathian Mountains. Samples are modern sediments. DZ age spectra reflect the geology and specifically the crustal age...
Article
Full-text available
This paper recommends maize stalk as a cheap natural ion exchanger. Ion exchange equilibrium was studied using thermodynamic and kinetic models. The results showed a high selectivity towards cationic species of antimony (III), molybdenum (VI), lead (II) and arsenium (III). Waste waters and sediments from tailing ponds samples were analysed.
Article
Full-text available
21 The Sibişel Shear Zone is a 1-3 km wide, ductile shear zone located in the South 22 Carpathian Mountains, Romania. In the Rășinari area, the ductile shear zone juxtaposes 23 amphibolite-facies rocks of the Lotru Metamorphic Suite against greenschist facies rocks of the 24 Râuşorul Cisnădioarei Formation. The first represents the eroded remnants...
Article
We present global and regional correlations between whole-rock values of Sr/Y and La/Yb and crustal thickness for intermediate rocks from modern subduction-related magmatic arcs formed around the Pacific. These correlations bolster earlier ideas that various geochemical parameters can be used to track changes of crustal thickness through time in an...
Article
Newly discovered xenoliths within Pliocene and Quaternary intermediate volcanic rocks from southern Peru permit examination of lithospheric processes by which thick crust (60-70 km) and high average elevations (3-4 km) resulted within the Altiplano, the second most extensive orogenic plateau on Earth. The most common petrographic groups of xenolith...
Article
Elemental chemistry, radiogenic isotopic data, and zircon U-Pb inheritance patterns for the Famatinian-Puna arc suggest that the primary petrogenetic process operating in the arc was mixing between subarc mantle-derived gabbroic magmas and metasedimentary materials without a substantial component of lower-crustal continental basement rocks. This mi...
Article
Full-text available
Magmatic arcs are the primary locations where continental crust is distilled to an intermediate, calc-alkaline composition. The root zones of continental arcs are thought to be the primary sites of magmatic differentiation, yet few deeply exhumed arc sections are available for direct study. The Coast Ridge Belt of central coastal California provide...
Chapter
Full-text available
The concept of hazard in the current interpretation of the regulations is directed to local and short term effects and its assessment is based on the distribution in space of the concentration of contaminants in abiotic and biotic compartments. We criticize this concept and introduce a potential hazard with full space-time dimension, i.e. from shor...

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Project (1)
Project
The current project represents an original inter-, pluri-, multi-, and transdisciplinary approach of the Domain 6 problematics – Cultural identity and heritage. Through its structure and management, the goals put forth by the component projects, its synergies and complementarities, the project has, undoubtedly, a high degree of accomplishment, being a complex, integrative and exhaustive approach for Romania. Its results will have a great deal of impact within both national and international scientific communities and the general audience, contributing through the anticipated activities to strengthening, developing and perfecting the CDI system in our country, as well as, to the professional formation of the future Romanian researchers. Projects final goal is to provide a complex multidisciplinary inter-institutional platform for integrative and systematic research of the identities and tangible and non-tangible cultural heritage in Romania. The Consortium that will implement this complex project is coordinated by the University of Bucharest (CO-UB), in joint partnership with the Institute of Archaeology “Vasile Pîrvan” of the Romanian Academy (P1-IAB), National Research-Development Institute for Physics and Nuclear Engineering” Horai Hulubei” (P2-IFIN-HH), University” Al. I. Cuza” Iași (P3-UAIC), West University Timișoara (P4-UVT), National Institute of Materials Physics (P5-INCDFM), National Institute for Research and Development in Informatics – ICI Bucrești (P6-ICI), University ”Ovidius” Constanța (P7-UOC) and University of Oradea (P8-UO). The geographical distribution Romanian wise ensures, without a doubt, a good regional representation of the juridical entities extant in the consortium. This partnership between 5 universities and 3 national research institutes signifies an ideal combination for the sustainability and the implementation of such a complex project.