1,720,994 research outputs found
Thick- and Thin-Skinned Thrusting in the Development of the Southern Apennine Thrustbelt: A Case Study from the Val D'Agri
No full textThe Argille Varicolori Unit of Lucania (Italy): a record of tectonic offscraping and gravity sliding in the Mesozoic-Tertiary Lagonegro Basin, southern Apennines
No full textThe Argille Varicolori Unit of Lucania (Italy): a record offscraping and gravity sliding in the Mesozoic-Tertiary Lagonegro Basin, southern Apennines
No full textDetailed geological mapping and new stratigraphic and structural data collected in the Lucania area of the southern Apennines allowed us to assess the deformation history of 11 Monte-Corleto Perticara zone, in the High Agri Valley (Lucanian Apennines, southern Italy) where red and green shales (known as Argille Varicolori or Argille scagliose) crop out. Our observations suggest that: (1) 'chaotic' facies within the Argille Varicolori may be attributed to a broken formation generated by overthrusting of Apenninic Platform units onto already deformed Lagonegro basin strata; (2) gravity sliding phenomena at the thrust front enhanced the development of debris flow and the emplacement of olistostromes at distances of up to tens of kilometres from the leading edge of the Apenninic Platform thrust; (3) the above processes probably ended in mid-Miocene time, as suggested by observed structural and stratigraphic relationships among accreted terranes and synorogenic deposits. The evolutionary model envisaged here could also be relevant in other active convergent zones, where seismic and drilling data are sparse, and in subaerial fossil margins where broken formations occur
The Argille Varicolori Unit of Lucania (Italy): a record of tectonic offscraping and gravity sliding in the Mesozoic-Tertiary Lagonegro Basin, southern Apennines
No full textThin-skinned versus thick-skinned structural models for Apulian carbonate reservoirs: constraints from the Val D'Agri Fields
No full textThe Apulian Platform Carbonates form the reservoir unit in several
major oil fields in the Val d'Agri area of southern Italy. Traps are
formed by compressional fold structures developed in the hanging wall
of major reverse faults. Published models for these structures
emphasize a 'thin-skinned' tectonic style with a basal detachment
located in Triassic evaporites. However, the generally poor quality of
seismic data in the southern Apennines means that subsurface
geometries are poorly constrained and seismic-structural
interpretation becomes model-driven. The density of data associated
with field development in the Val d'Agri area provides an opportunity
to constrain structural models at a variety of scales. Good quality
seismic data image the front of the Monte Alpi field and show
involvement of the Base Apulian seismic reflection in compressional
structures. Locally, well-defined fault plane reflectors image the
moderate-steeply dipping, convex-up reverse faults that bound the
structures. Integration of well, vertical seismic profiles and seismic
data confirm the dominance within the reservoir of moderate-high angle reverse and normal faulting. Taken together these elements suggest that a thick-skinned structural model is most appropriate for the Val d'Agri Apulian structures, whilst the geometry of the main bounding faults suggests that they are inverted Permo-Triassic extensional faults
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Neogene-Quaternary shortening, tectonic burial and exhumation in the Southern Apennines fold and thrust belt (Italy): Geological, Geophysical and thermochronological constraints
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