Reconstruction of the eruptive activity on the NE sector of Stromboli volcano: timing of flank eruptions since 15 ka

A multidisciplinary geological and compositional investigation allowed us to reconstruct the occurrence of flank eruptions on the lower NE flank of Stromboli volcano since 15 ka. The oldest flank eruption recognised is Roisa, which occurred at ~15 ka during the Vancori period, and has transitional compositional characteristics between the Vancori and Neostromboli phases. Roisa was followed by the San Vincenzo eruption that took place at ~12 ka during the early stage of Neostromboli period. The eruptive fissure of San Vincenzo gave rise to a large scoria cone located below the village of Stromboli, and generated a lava flow, most of which lies below sea level. Most of the flank eruptions outside the barren Sciara del Fuoco occurred in a short time, between ~9 and 7 ka during the Neostromboli period, when six eruptive events produced scoria cones, spatter ramparts and lava flows. The Neostromboli products belong to a potassic series (KS), and cluster in two differently evolved groups. After an eruptive pause of ~5,000 years, the most recent flank eruption involving the NE sector of the island occurred during the Recent Stromboli period with the formation of the large, highly K calc-alkaline lava flow field, named San Bartolo. The trend of eruptive fissures since 15 ka ranges from N30°E to N55°E, and corresponds to the magma intrusions radiating from the main feeding system of the volcano

<33,000-yr K–Ar dating of the volcano–tectonic horst of the Isle of Ischia, Gulf of Naples

International audienc

Medicina por Imágenes: la visión globalizada. Parte III: la visión desde el Derecho Image Based Medicine: the global vision. Part III: Legal Aspects

La visión globalizada del diagnóstico por imágenes es una puesta al día, creemos que necesaria, de los caracteres más relevantes de esta bellísima disciplina. Está dirigida a quienes todavía no han decidido su camino y están finalizando sus carreras de grado -médica o técnica-, pero también a aquellos que ya han comenzado la residencia; y quizá también para quienes habiendo recorrido ya un largo trayecto, conservan un espíritu crítico y una mirada joven. A la luz del nuevo milenio, y cuando se han cumplido veinticinco años de su reconocimiento como especialidad por parte de la comunidad médica de nuestro país, los autores examinamos esta visión que no se conforma con la mirada unilateral del radiólogo sino que busca también la proveniente de otros saberes y ciencias. Por ello, se incluye una aproximación desde el derecho -sobre un tema puntual-, se tratan los aspectos educacionales y se incorporan la mirada desde el área técnica, la perspectiva de la filosofía y la bioética y las visiones desde la psicología, desde la gestión de los recursos humanos y los aspectos de ciencia y tecnología, entre otras.The global vision of diagnostic imaging is a necessary update, we think, of the most relevant characters of this beautiful discipline. It is directed to those advanced students of Medicine and Radiology Technique career who have not yet decided their future activity but also to the already graduated who are just beginning their residence training programs; and maybe to those who keep a critical spirit and a young glance, in spite of the chronological age. At daybreak of the millennium and when we are assisting to the twenty five anniversary of its origin and recognition as a new speciality inside the medical community in our country, we the authors, have selected not only the unique vision of the radiologist but also the vision of other fields of knowledge and sciences. So because of this we develop the legal view on one particular topic, the educational aspects, the technologists view, the philosophical and ethical perspectives, the psychological vision, the view on human talent management and the science and technology aspects, between other items

Simulations using terrestrial geological analogues to assessinterpretability of potential geological features of the Hermean surfacerestituted by the Stereo imaging Camera of the SIMBIOSYS package(BepiColombo mission)

The BepiColombo space mission is one of the European Space Agency’s cornerstone projects; it is planned for launch in 2013 to studythe planet Mercury. One of the imaging instruments of BepiColombo is a STereo Camera (STC), whose main scientific objective is the global stereo mapping of the entire surface of Mercury. STC will permit the generation of a Digital Terrain Model (DTM) of Mercury’s surface, improving the interpretation of morphological features at different scales and clarifying the stratigraphic relationships between different geological units. To evaluate the effectiveness of the STC-derived DTM for geological purposes, a series of simulations has been performed to find out to what extent the errors expected in the DTM may prevent the correct classification and interpretation of geological features. To meet this objective, Earth analogues (a crater, a lava cone and an endogenous dome) of likely components of the Hermean surface, small enough to be near the detection limit of the STC, were selected and a photorealistic three-dimensional (3D) model of each feature was generated using Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) stereo images. Stereoscopic pairs of synthetic images of each feature were then generated from the 3D model at different locations along the BepiColombo orbit. For each stereo pair, the corresponding Hermean DTM was computed using image correlation and compared to the reference data to assess the loss of detail and interpretability. Results show that interpretation and quantitative analysis of simple craters morphologies and small volcanic features should be possible all along the periherm orbit arc. At the apoherm only the larger features can be unequivocally distinguished, but they will be reconstructed to a poor approximation

Tectonic control over the abuli samsari volcanic ridge, lesser caucasus, Georgia

The purpose of the present work is to integrate previous research focused on the Abuli Samsari Volcanic Ridge, situated in the Javakheti Highland, Georgia. Through a synergic approach, consisting in the collection and analysis of field and satellite data, combined with the results of previously published research, we have been able to define the overall structure of the volcanic ridge, which, on its northern sector, is cut across by two parallel pipelines, carrying oil and gas from the Caspian Sea to the western countries. Despite the likelihood of seismic or volcanic events in the area, geohazard assessment had never been adequately performed for this section of the pipelines’ route across Southern Georgia. The most relevant outcomes of our effort, aimed at filling this critical gap, consist in: the identification and mapping of eruptive centers and tectonic lineaments; the reconstruction of magma pathways; the definition of the expected moment magnitude for possible earthquakes; the assessment of orientation of the maximum horizontal stress from the Late Miocene to the present day. We have used these results to evaluate the current seismic and volcanic hazards affecting the Abuli Samsari Volcanic Ridge, which may have major impacts on the security of the pipelines. The calculated, about N-S directed maximum horizontal stress may play a key role in volcanic reactivation, which might occur in the form of fissure eruptions and the formation of new vents and monogenetic as well as composite volcanoes. As the track of the pipelines lies just north of the younger volcanic edifice in the ridge we suggest that these lifelines could be severely affected by possible future volcanic eruptions, which might bring about a major interruption in oil delivery from the Caspian Sea towards the west