Three Dimensional Plate Kinematics in Romania     

Dinter  Georg  Schmitt  Günter 《Natural Hazards》2001,23(2-3):389-406

Since 1996 the Collaborative Research Center (CRC) 461``Strong Earthquakes: A Challenge for Geosciences andCivil Engineering' is funded by the DeutscheForschungsgemeinschaft (German Research Foundation) asa German contribution to the UN initiative``International Decade of Disaster Reduction' (IDNDR).A central project of this CRC is the subproject B1``Three Dimensional Plate Kinematics in Romania', whichis installed to detect borders of the geotectonicplates in Romania, to quantify their three-dimensionalmovement rates and to determine in detail thedeformation of each geotectonic unit in the VranceaRegion as a contribution to the research of thetectonic cause of the intermediate depth earthquakesin this region. These aims shall be accomplished byrepeated GPS-measurements in a network which has beeninstalled in 1997 and measured until now in 1997 and1998. This network is consisting of 26 stations,covering an area of 250 km × 380 km with the Vranceaarea as the centre. The geodetic frame is given by sixstations of the CEGRN (Central European GeodynamicRegional Network) of the CEI-initiative CERGOP, forwhich coordinates and velocities in a global tectonicscenario are available. The paper gives informationabout the tectonic background, the geodetic network,the GPS-measurements and the achieved accuracies andfirst results of deformation analyses. It is shownthat until now no significant deformations could bedetected. But the extension of the GPS network andremeasurements with time intervals of two years willallow statements about the recent crustal movementswithin the lifetime of the CRC 461.  相似文献   

Toponymy and the Communist city: Street names in Bucharest, 1948–;1965     

Duncan Light  Ion Nicolae  Bogdan Suditu 《GeoJournal》2002,56(2):135-144

Past studies of the Socialist/Communist city have paid only limited attention to the ways in which Communist regimes mobilised a wide variety of symbols in the urban landscape in order to legitimate and institutionalise the ideology of revolutionary socialism. This paper considers the role of street names in this process with particular reference to Bucharest, Romania during the 1948–1965 period. When the Communist regime came to power it embarked on widespread renaming of streets as one means of both `decommemorating' the pre-socialist regime and proclaiming the agenda and ideology of the Communist state. The new street names commemorated a variety of events and personalities from the history of Romanian and Soviet Communism. The impact of street names was amplified further through practices such as multiple namings and the spatial clustering of street names of high ideological resonances. The paper argues that Bucharest's street names can be `read' as a mirror of ideological change, changing constructions of national identity, and Romania's macro-political orientation (especially its changing relations with the Soviet Union).  相似文献   

The biota of Romanian saline lakes on rock salt bodies: A review     

Venera Ionescu  Maria Năstăsescu  Lucreţia Spiridon  Valentin A. C. Bulgăreanu 《International Journal of Salt Lake Research》1998,7(1):45-80

An inventory of the aquatic and circum-lacustrine flora and aquatic fauna of 23 karst- and anthroposaline lakes formed on Miocene rock salt bodies in Romania was undertaken. Simultaneous field determinations of water and sediment pH, total dissolved solids, Secchi transparency and lake maximum depth were also made. Environmental conditions for phytoplankton, microphytobenthos, macrophyte and cormophyte species were defined. Relations between the numbers of plankton, microbenthos, macrophyte and cormophyte species differentiated pelogenous (usually, therapeutic) and non-pelogenous lakes. High densities and occurrence frequencies characterized the most representative species. For three of these species, Amphora veneta, Artemia sp. and Potamogeton pectinatus, ecological conditions were noted. In the circum-lacustrine vegetation, glycophytes were more important than halophytes.  相似文献   

Conservation and rural change in Valcea County     

Gheorghe Ploaie  David Turnock 《GeoJournal》1998,46(3):289-303

Valcea is one of Romania's Wallachian counties with landscapes which grade from the Carpathians through the Subcarpathians and Piedmont zone towards the plain. Agriculture plays a major role in the economy but there is also a long-established tourist industry and the industrial base (established through the processing of local raw materials: agricultural commodities, timber and salt) has been enlarged and diversified under communism. The tourist industry has also expanded with reference to the mineral waters. But agriculture still plays an important role. Environmental pressures on sensitive Carpathian ecosystems have increased over the years and under the transition conservation measures should include national park designations to provide a buffer for clusters of nature reserves. The paper discusses the nature of the environmental problems and the significance of national and ‘natural’ parks for the development of tourism in the area, with particular reference to Buila-Vanturarita area of the Capatina Mountains. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

The health state of the Romanian population during the transition period     

Liliana Dumitrache  Iuliana Armas 《GeoJournal》1998,44(2):151-160

The paper attempts to make an assessment of the health state of the Romanian population during the transition period; the evolution of the health indicators, analyzed in the European context, shows the precarious health state of the Romanian population, in comparison both to Western countries and to the countries which are crossing a transition phase themselves. The values of the health indicators by region also show inequalities of health, the north-western and south-eastern areas of the country having to face serious problems. The reduction of living standard, the low quality health services, together with other factors associated with lifestyle seem to be responsible for the deterioration of the health state of the Romanian population. The introduction of adequate health and social policies in the following period could bring about an improvement of the situation. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

The Valanginian history of the eastern part of the Getic Carbonate Platform (Southern Carpathians,Romania): Evidence for emergence and drowning of the platform     

《Cretaceous Research》2016

Lower Cretaceous successions that crop out in the eastern part of the Getic Carbonate Platform (Southern Carpathians, Romania) preserve records of the Valanginian events in different settings of the platform. The integrated sedimentological, biostratigraphical, geochemical and mineralogical analysis of the upper Berriasian–Valanginian successions reveal successive stages in the evolution of the carbonate platform: (a) pre-drowning stage of the shallow-shelf and slope settings of the platform; (b) subaerial exposure and karstification; and (c) incipient flooding and drowning of the carbonate platform. Following the subaerial exposure, starting in the middle early Valanginian, the eastern part of the Getic Carbonate Platform experienced a drowning phase documented by iron oxyhydroxides, phosphate and glaucony mineralized discontinuity surface and glaucony-rich sediments disposed on the discontinuity surface. Recognition of the diachronous intra-Valanginian discontinuity surface within the studied successions is based on clear evidences (facies contrast, depositional and diagenetic features, biostratigraphic and taphonomic data, and geometrical relations). The negative–positive carbon isotope excursion is correlated with the global perturbations of the carbon cycle related to the Valanginian “Weissert” episode, and it is documented for the first time in the shallowest parts of the Getic Carbonate Platform. Tectonic activity and eustatic sea-level fluctuations were most probably the main factors that led to fault-block tilting, local emersion and subsequent drowning of the eastern part of the Getic Carbonate Platform during the Early Cretaceous. We infer that the eastern part of the Getic Carbonate Platform was affected by late Berriasian–early Hauterivian extensional tectonics that could be related to the Neo-Cimmerian movements with effects generally recognized in the northern peri-Tethyan areas.  相似文献   

High-resolution teleseismic body wave tomography beneath SE-Romania – II. Imaging of a slab detachment scenario     

M. Martin  F. Wenzel  the CALIXTO working group 《Geophysical Journal International》2006,164(3):579-595

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3-D upper crustal tomographic structure across the Vrancea seismic zone, Romania     

CALIXTO Group  Michael Landes  W. Fielitz  F. Hauser  M. Popa   《Tectonophysics》2004,382(1-2):85-102

The VRANCEA99 and VRANCEA2001 seismic refraction experiments are part of a multidisciplinary project to study the Eastern Carpathians in Romania. The objectives of these studies are intended to disclose a more detailed picture of the crustal and upper mantle structures above the seismically active Vrancea region. In this paper we provide additional constraints for the upper crustal structures of the area. The 1999 campaign consisted of a 320-km-long N–S profile and a 70-km-long E–W profile. The intersecting 2001 profile extended in E–W direction from the Hungarian border to the Black Sea. In order to enhance the model resolution, first arrival data from local crustal earthquakes were also included.This configuration allowed for the first time to derive a 3-D velocity model for the upper crust of the Romanian Carpathian Orogen, within a 115×235 km wide region, centred over the Vrancea seismic zone. The 3-D model reveals lateral velocity variations, which were not visible on the in-line interpretations. It allows us to distinguish between foreland platform areas, foreland basins and the Carpathian Orogen. Clear velocity differences between the foreland basins south and southeast of the Eastern Carpathians and the Focsani Basin further north indicate different pre-Miocene sedimentary compositions and geological evolutions of these foreland platforms. The involved Moesian and Scythian platforms are separated by the Trotus Fault system, which is observed as a velocity discontinuity. An upper crustal high-velocity zone, above the northern Vrancea seismic zone, could also be identified. This high-velocity zone is explained by a Middle Pliocene to Pleistocene E–W oriented out-of-sequence thrust of the crystalline basement, below the decollement of the flysch nappes.  相似文献   

Palaeomagnetic study of some Neogene magmatic rocks from the Oaş-Igniş-Văratec-Tibleş Mountains (Romania)     

&#;t. P&#;tra&#;cu 《Geophysical Journal International》1993,113(1):215-224

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Identification of blasting sources in the Dobrogea seismogenic region,Romania using seismo-acoustic signals     

《Physics and Chemistry of the Earth》2016

In order to discriminate between quarry blasts and earthquakes observed in the Dobrogea seismogenic region, a seismo-acoustic analysis was performed on 520 events listed in the updated Romanian seismic catalogue from January 2011 to December 2012. During this time interval, 104 seismo-acoustic events observed from a distance between 110 and 230 km and backazimuth interval of 110–160° from the IPLOR infrasound array were identified as explosions by associating with infrasonic signals. WinPMCC software for interactive analysis was applied to detect and characterize infrasonic signals in terms of backazimuth, speed and frequency content. The measured and expected values of both backazimuths and arrival times for the study events were compared in order to identify the sources of infrasound. Two predominant directions for seismo-acoustic sources’ aligning were observed, corresponding to the northern and central parts of Dobrogea, and these directions are further considered as references in the process of discriminating explosions from earthquakes. A predominance of high-frequency detections (above 1 Hz) is also observed in the infrasound data. The strong influence of seasonally dependent stratospheric winds on the IPLOR detection capability limits the efficiency of the discrimination procedure, as proposed by this study.  相似文献