117,594 research outputs found
Structures, interfernce patterns and strain regime during mid-crustal deformation in the Alpi Apuane (Northern Apennines, Italy)
No full textIn this paper, we present results of new investigations and structural analyses on the geometries, strain patterns, and kinematics of folds in the Alpi Apuane, northwest Tuscany, Italy.
The analyzed structures were formed in mid-upper crustal conditions (temperature and pressure range between 450 and 300°C and 0.6 and 0.4 GPa) during under-thrusting and early exhumation of a slice of Adria-derived continental crust involved in the continental subduction process. In particular, we focused our attention on the relationships between folds, localized zones of deformation, and superimposed strain patterns. Kilometer-scale fold-nappes with strongly noncylindric 3D geometries developed during the early regional scale deformation event D1, whereas later large-scale noncylindric folds associated with a subhorizontal crenulation axial planar foliation refold previous structures during D2. Although the early deformation D1 can be related to an important component of noncoaxial deformation, the following D2 was instead associated with a vertical shortening and a bulk coaxial strain. The above described D1 and D2 structures developed during crustal underplating and syn-contraction exhumation record strain regime partitioned through time with an overall decrease in the noncoaxiality of deformation. This possibly reflects the movement of the unit across the deeper part of the Late Oligocene-Miocene Apenninic wedge, with a progressive increase of gravity-induced sagging in the rear part of the orogen
Exhumation-related deformation structures in the eastern Alpi ApuaneE: new meso- and MICmicroscale data
No full textUn'analisi esplorativa sulle dinamiche organizzative
No full textIl capitolo esamina i nessi fra assetti organizzativi, culture e competenze professionali dei ricercatori del CNR
Deformation geometries and strain patterns of a refolded sheath-nappe fold: the M. Altissimo-M. Corchia Syncline, Alpi Apuane, Italy
No full textStyles of contemporaneous normal faulting, folding and out-of-sequence thrusting in the recent tectonic evolution of the northern Apennines
No full textSuperimposed exhumation-related deformation structures from cartographic to microscale: examples from the southeastern Alpi Apuane (Italy).
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Polydeformed structures of the central Apuane Alps between Arni and Mt. Corchia: Historical knowledges, structural data and open problems [La struttura polideformata delle Alpi apuane centrali tra Arni e M. Corchia: conoscenze storiche, dati attuali e problemi aperti]
No full textThis contribution concerns the puzzling polydeformed structure cropping out in the Arni-Mt Corchia area and surroundings, in the central-eastern Apuane Alps Metamorphic Complex (AMC). The main point is the presence of thick and long belts of principally Mesozoic and Tertiary paraschists (Apuane Unit) exhibiting widespread milonitic and/or cataclastic-milonitic meso- to microfabrics. In the frame of the AMC large-scale structure, characterised by a general Apennine strike of all the tectonic lineaments, these belts are persistent mainly along a 5-6 km wide, WSW-ENE trending length from the high Frigido valley (Massa) up to E of Isola Santa village, in the Turrite Secca valley, a transversal setting well known since the work of GIGLIA (1967). These structures resulted from extreme development of localised shear deformation during the last stages of the compressive tectonic phase of the Tertiary orogenesis, being clearly involved in polystage D 2 deformations. The recognition and detailed mapping of such shear pattern allows to highlight further aspects in the progressive deformation of the compression tectonics (D 1) and the following uplift-related extension (D 2) in the lowermost metamorphic unit directly visible in the Apennine chain
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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