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The contribution of italian scientists to the geology of Turkey.
No full textFifty years ago, Giorgio Pasquarè published the results of his studies on the volcanism of Anatolia conducted on the behalf of the mta (Maden Tektik ve Arama, Turkey’s National Geological Service). Since then, a lot of Italian scientists have carried on, with increasing continuity and frequency, scientific studies in all the fields of Earth Sciences on Anatolia, matched by a number of collaborations with the Turkish scientific community.
From the middle of the last century, the Italian geological community had increasingly been attracted by the geology of Turkey, for several reasons. On one hand, the richness and variety of the geology of the region and on the other hand, the many similarities with the Italian geology. Italy and Turkey are both geologically active lands with even very large active volcanic
belts, significant seismic activity, Cenozoic fold and thrust belts characterized by impressive ophiolitic sutures and both are areas rich of Earth resources, such as mineral deposits and geothermal energy. The main purpose of this Special Volume is to present
a review on some of the research activities carried out by the Italian geologists in Turkey, from the early ’60s of the twentieth century to the present day. This volume arose from the request made by the organizers of the 7th Geochemistry Symposium organized by the University of Ankara in Antalya in May 2016, which hosted a special poster session, where these papers were
presented. This volume starts with a historical summary of researches in the field of volcanology, petrology and statigraphy carried out by the first generation of Italian scientists between 1962 and 1982 (Manetti and Agostini: The contribution of the first Italian geologists to the knowledge of the Anatolian Cenozoic volcanism), followed by two papers about the development of volcanic activity in Western Anatolia (Agostini et alii: The Italian-Turkish collaboration on Western Anatolia volcanism and Geodynamics: state of the art) and in Central and Eastern Anatolia (Agostini et alii: Recent studies on Central and Eastern Anatolia volcanism). Two articles are targeted to the regional geology of Pontides, whose geological and stratigraphic data, together with those of geophysics, provided a major contribution to the genetic and evolutionary models of the Black Sea (Boccaletti et alii: The contribution of the Italian Geologists to the knowledge of the Pontides; Boccaletti and Manetti: The role of the Pontides for the interpretation of the origin and evolution of the Black Sea). One of the first subjects of investigations of the Italian geologists in Turkey, along with those about volcanology and petrology, was the study of ophiolitic belts in Anatolia: since 1965, a series of studies were conducted to compare the emplacement mechanisms, attitude and age between the impressive Anatolian ophiolitic complexes and those from the Northern Apennines and Corsica (Bortolotti et alii: The Italian contribution to the studies of Anatolian ophiolites). In the last decade, these studies started back with a main focus on the intra-Pontide ophiolite suture (Marroni et alii: The Italian contribution to the study of the Intra-Pontide suture zones in Central Turkey). Thermochronological studies (Cavazza and Zattin: Exhuming Anatolia: the Italian contribution to the lowtemperature thermo-chronological study of Turkey and surrounding regions) were another important field of studies, which allowed the identification of a Middle Miocene episode of cooling/exhumation along the Arabia-Eurasia collision zone as well as the existence of an Oligocene precursor of the North Anatolian Fault in the Western Marmara Sea region. The last paper (Alçiçek et alii: Extensional structures and hydrothermal fluid flow in Western Anatolia: a review from the Neogene-Quaternary Dinar and Denizli Basins) concerns one of the most important georesources of Turkey, related to impressive extensional fault structures: geothermics and thermal waters. We wish to stress that since 1966 to date there has been a continuous series of studies carried out by the Italian scientific community, without hiatuses, in cooperation with the Turkish scientific community. In the Appendix it is reported a list of publications involving Italian scientists on studies related with Anatolian geology. We believe we provided an almost complete list of published papers until 2005, although in the last ten years, the research activities of the Italian geologists in Turkey spread and had substantially increased and the papers listed in the Appendix are likely not complete. We apologize if some references were not quoted. From the publications listed in the appendix, it is also evident that there are very important research fields, which were not reviewed in the papers enclosed in this Special Volume, such as, among the others, archaeometry, marine geology, geophysics and geodynamics. Finally, the Editors acknowledge all of the authors who contributed to this volume, and M.Y. Sava¿çın and all the organizing committee of the 7th Geochemistry Symposium held in Antalya on 16-18 May 2016
Magmatism from Mesozoic to Present: petrogenesis, time-space distribution and geodynamic implications
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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
Neogene alkaline volcanism of the Afyon-Isparta area, Turkey: petrogenesis and geodynamic implications
No full textIn the Kirka-Afyon and Isparta areas, potassic and ultrapotassic alkaline magmatism followed Upper Eocene - Middle Miocene calc-alkaline volcanism, which was related to the northward subduction of the African Plate beneath Eurasia. The alkaline volcanism lasted from 14.8 Ma (in the north) to 4 Ma (in the south) and was associated with a presently still active extensional tectonic regime. It is mainly located along a N-S fault, which marks the limit between the Aegean Are and the Cyprus Are (Isparta Angle). In the Kirka-Afyon area the potassic to ultrapotassic rocks range from silica saturated (trachybasalts to trachytes) to highly undersaturated (phonolitic leucitites). In the Isparta area ultrapotassic rocks occur together with rhyolitic lavas. In both areas, the ultrapotassic magmatism is transitional between lamproitic and Roman type, with a more lamproitic character for the Isparta rocks. The potassic suites of both the Kirka-Afyon and Isparta areas are characterised by rocks with Sr isotope ratios increasing from mafic to silicic rocks. The rocks from Kirka-Afyon area have an orogenic affinity, whereas those from Isparta area exhibit orogenic (the potassic suite) and within-plate (the ultrapotassic suite) affinities. Extreme enrichments in LIL elements characterise the Afyon phonolitic leucitites, whereas enrichments in Sr and REE are observed in Isparta potassic rocks. A residual, probably lithospheric mantle metasomatised by fluids and/or melts of different origin (subduction-related for the Kirka-Afyon rocks; deep astenospheric origin for the Isparta rocks), is considered to be the source of the ultrapotassic magmas. A more "fertile" and probably deeper mantle, enriched by subduction-related components, is believed to be the source of the potassic rocks. Lower degrees of partial melting, in the mantle, at higher pressure, and probably at higher X-CO2, may account for the genesis of the phonolitic leucitite parental magmas. Partial melting of the mantle took place simultaneously in both sources, probably due to post-collision extensional tectonics, which was also responsible for the uprise of deep astenospheric mantle
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
The Cenozoic back-arc magmatism of the southern extra-Andean Patagonia (44.5-52° S): A review of geochemical data and geodynamic interpretations
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