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  • 11
    Publication Date: 2017-04-04
    Description: The Southern Apennines, Calabro-Peloritane block, and Sicilian Maghrebides form a ~700 km long orogenic bend, known as Calabrian Arc (Cifelli et al., 2007). The bending of this orogenic system was realized progressively through opposite-sense rotation of the two limbs, counterclockwise (CCW) in the Southern Apennines and clockwise (CW) in the Sicilian Maghrebides, synchronous to the Miocene-to-Present opening of the Tyrrhenian Sea. Despite the wealth of paleomagnetic data from the Southern Apennines, the main Miocene rotational phase still remains poorly constrained in time and, more importantly, data from the most internal paleogeographic domains of the belt are completely lacking. The Gorgoglione Formation, a middle Miocene piggy-back deposit of the Southern Apennines, unconformably resting over the internal Sicilide Unit, offers the unique opportunity to document the deformation pattern of the most internal units, and reconstruct the incipient tectonic phases leading to the formation of the Calabrian Arc. New paleomagnetic and biostratigraphic data from the Gorgoglione Fm. reveal a post-early Serravallian ~125° CCW rotation with respect to stable Africa. Such a large rotation, affecting the Gorgoglione Fm. (and consequently the underneath allochthonous Sicilide nappe) exceeds by ~45° the maximum mean CCW rotation previously reported for the Southern Apennines. We propose that the additional ~45° CCW rotation measured in the Sicilide Unit is the result of an earlier, late Miocene phase of deformation related to the onset of the Tyrrhenian Sea opening and affecting the most internal paleogeographic domains of the Southern Apennines. Our reconstructed tectonic scenario confirms and emphasizes the central role of the Ionian slab in the geodynamic evolution of the central Mediterranean.
    Description: Published
    Description: 24-37
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: JCR Journal
    Description: restricted
    Keywords: Southern Apennines ; Gorgoglione Formation ; Paleomagnetism ; Tectonics ; Calabrian Arc ; Biostratigraphy ; 04. Solid Earth::04.04. Geology::04.04.08. Sediments: dating, processes, transport ; 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 12
    Publication Date: 2017-04-04
    Description: We present a high resolution integrated stratigraphy (calcareous plankton biostratigraphy and magnetostratigraphy) of the upper Burdigalian to lower Langhian interval in the La Vedova section (Conero Riviera, Italy). The succession of planktonic foraminifer and calcareous nannofossil events and their relative position in the La Vedova section are comparable with those recorded in other Mediterranean sections suggesting a continuous deposition across the Burdigalian/Langhian boundary interval. The high resolution magnetostratigraphic record, integrated with calcareous plankton events, has been correlated to the ATNTS2004 and ranges from sub-chrons C5Cn.1n to C5Bn.2n. In addition, the integrated magnetobiostratigraphic record of the La Vedova section provides a new magnetostratigraphic calibration of calcareous plankton events, thereby improving the existing Mediterranean biochronology for the upper Burdigalian to lower Langhian. On the basis of our magnetobiostratigraphic results, the deep marine La Vedova section could be considered a suitable succession for defining the Langhian GSSP (Global Stratotype Section and Point). The recommended guiding criteria to identify the base of the Langhian stage (the Praeorbulina datum and the magnetic reversal C5Cn/C5Br) are recorded in the section. In this work the Praeorbulina datum is represented by the first occurrence of P. glomerosa curva following Blow (1956; 1969). In the La Vedova section, this bioevent postdates the Acmea End of the planktonic foraminifer Paragloborotalia siakensis and the Paracme End of the calcareous nannofossil Sphenolithus heteromorphus, approximates the C5Br/C5Bn.2n reversal boundary and is dated at 15.23 Ma. The top of Chron C5Cn, dated at 15.974 Ma, is better approximated by the Last Common Occurrences of the calcareous nannofossil Helicosphaera ampliaperta and the planktonic foraminifer Paragloborotalia bella. At La Vedova the first occurrence of P. glomerosa curva is about 740 kyrs younger than C5Cn /C5Br reversal boundary, which represents the provisional guiding criterion to define the base of the Langhian (Lourens et al. 2004). The age difference between the Praeorbulina datum and the top of C5Cn implies that the Langhian GSSP cannot be located in a position close to both Chron C5Cn and the Praeorbulina datum (Lourens et al. 2004) and that the selection of either of these guiding criteria to identify the base of the Langhian will strongly affect its duration.
    Description: Published
    Description: xxx-xxx
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: JCR Journal
    Description: reserved
    Keywords: integrated stratigraphy ; calcareous plankton biostratigraphy ; magnetostratigraphy ; Mediterranean ; Langhian GSSP ; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy ; 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 13
    Publication Date: 2021-09-08
    Description: We present the results of a stratigraphic study carried out on the Lower Miocene “La Moria” section (43°30’13.9’’N, 12°35’39.1’’E), outcropping in the neighborhoods of the Cantiano village (Marche Region, Central Italy). The succession, about 55 m thick, shows in its lower part, the transition between the Bisciaro and the Schlier Formations (Auctorum). The first is represented by few meters of indurated marly limestones and the second by about 50 meters of blue marly clays, interbedded by thin calcareous horizons in the uppermost portion. According to the existing literature the succession yields the so-called “Piero della Francesca” horizon, a biotite rich level few centimeters thick, radiometrically dated at 17.1 Ma (Deino et al., 1997), occurring at about 24 meters from the base of the section. The succession has been sampled for both magnetostratigraphic and calcareous plankton analyses. In spite of the absence of magnetic signal in the first 12 meters of the section, satisfactory results have been obtained for most of the examined succession. The calcareous plankton content shows different degree of preservation, being better for the calcareous nannofossil and worse for the planktonic foraminifers. Nevertheless, a set of useful biohorizons have been detected, which have been dated through the integration with the magnetostratigraphic data. The present study provides interesting results whose value is amplified considering the scarsity of Miocene Mediterranean successions characterized by reliable magnetostratigraphic and biostratigraphic data. In addition, the correlation of the present results with those obtained in the DSDP Hole 608 succession (North Atlantic) gives the opportunity to evaluate the sinchroneity of the detected biohorizons and to establish correspondence between the Mediterranean and the Atlantic in the considered time interval.
    Description: Published
    Description: Catania
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: restricted
    Keywords: calcareous plankton biostratigraphy ; magnetostratigraphy ; lower miocene ; Umbro-Marche Apennine ; Central Italy ; 04. Solid Earth::04.04. Geology::04.04.08. Sediments: dating, processes, transport ; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Abstract
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  • 14
    Publication Date: 2021-09-08
    Description: Results of high-resolution integrated stratigraphic studies (calcareous plankton and magnetostratigraphy) of three Mediterranean sections (La Vedova in Central Italy, Contrada Pesciarello in Sicily and St. Peter’s Pool in Malta) and one deep-sea core from the mid-latitude North Atlantic (DSDP Hole 608) are here synthesized. They are compared with those of previously studied deep marine sections in the Mediterranean including the historical stratotype, with the aim to select the most suitable section and criterion to define the Langhian GSSP (Global Stratotype Section and Point). This study significantly improves the existing magnetobiostratigraphic framework for the upper Burdigalian-lower Langhian and opens new perspectives for defining the Langhian GSSP. An extensive review of the first stages of the Globigerinoides-Praeorbulina evolutionary lineage pointed out that the Praeorbulina datum, historically used (and/or suggested) to approximate the base of the Langhian, coincides with the First Occurrence (FO) of P. glomerosa curva instead of P. sicana which is here included in the genus Globigerinoides. The FO of P. glomerosa curva occurs close to the C5Br/C5Bn.2n reversal boundary. As a consequence, the two recommended guiding criteria to recognize the base of the Langhian, i.e. the Praeorbulina datum and the top of Chron C5Cn.1n, can not be applied together, as these two events differ in age by ~740 kyr. The selection of either of these two criteria will imply a different duration for the Langhian: relatively short, in case the FO of P. glomerosa curva is selected, or longer and probably more acceptable, in case the top of Chron C5Cn.1n is selected. The primary calcareous plankton biohorizons which, according to our data, appoximate the top of Chron C5Cn.1n, are the Last Common Occurrence (LCO) of the calcareous nannofossil Helicosphaera ampliaperta and the LCO of the planktonic foraminifer Paragloborotalia bella. Other calcareous plankton events have been recorded close to the same magnetic reversal, such as a short influx of H. ampliaperta (Ia1) and the Paragloborotalia siakensis Acme0. The P. siakensis Acmea End (AaE) and the Sphenolithus heteromorphus Paracme End (PE) represent the primary plankton biohorizons associated with the P. glomerosa curva FO. Two of the three studied Mediterranean sections (La Vedova and St. Peter’s Pool), each from different point of view, are potentially suitable to be proposed as candidates for the definition of the Langhian GSSP. Yet, further studies on stable isotope stratigraphy and cyclostratigraphy, including astronomical tuning are necessary before the most suitable section and guiding criterion can be selected.
    Description: Published
    Description: xxx-xxx
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: JCR Journal
    Description: reserved
    Keywords: calcareus plankton stratigraphy ; magnetostratigraphy ; Langhian GSSP ; Mediterranean ; mid-latitude North Atlantic Ocean ; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy ; 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 15
    Publication Date: 2021-09-03
    Description: The Montalbano Jonico (MJ) section, cropping out in Southern Italy, represents a potential candidate to define the Lower/Middle Pleistocene boundary and it has been proposed as a suitable Global Stratotype Section and Point (GSSP) of the Ionian Stage (Middle Pleistocene). The MJ section is the only continuous benthic and planktonic δ18O on-land reference in the Mediterranean area for the Mid-Pleistocene transition, spanning an interval between about 1240 and 645 ka. Combined biostratigraphy and sapropel chronology, tephra stratigraphy and complete high-resolution benthic and planktonic foraminiferal stable oxygen isotope records already provide a firm chronostratigraphic framework for the MJ section. However, magnetostratigraphy was still required to precisely locate the Brunhes-Matuyama transition and to mark the GSSP for the Ionian stage. We carried out a palaeomagnetic study of a subsection (Ideale section) of the MJ composite section, sampling 61 oriented cores from 56 stratigraphic levels spread over a ca. 80-m-thick stratigraphic interval that correlates to the oxygen isotopic stage 19 and should therefore include the Brunhes-Matuyama reversal. The palaeomagnetic data indicate a stable and almost single-component natural remanent magnetization (NRM). A characteristic remanent magnetization (ChRM) was clearly identified by stepwise demagnetization of the NRM. The ChRM declination values vary around 0◦ and the ChRM inclination around the expected value (59◦) for a geocentric axial dipole field at the sampling locality. This result indicates that the section has been remagnetized during the Brunhes Chron. A preliminary study of 27 additional not azimuthally oriented hand samples, collected at various levels from other parts of the MJ composite section, indicates that all the samples are of normal polarity and demonstrates that the remagnetization is widespread across the whole exposed stratigraphic sequence. A series of specific rock magnetic techniques were then applied to investigate the nature of the main magnetic carrier in the study sediments, and they suggest that the main magnetic mineral in the MJ section is the iron sulphide greigite (Fe3S4). Scanning electron microscope observations and elemental microanalysis reveal that greigite occurs both as individual euhedral crystals and in iron sulphides aggregates filling voids in the clay matrix. Therefore, we infer that the remagnetization of the section is due to the late-diagenetic growth of greigite under reducing conditions, most likely resulting in the almost complete dissolution of the original magnetic minerals. Iron sulphide formation in the MJ section can be linked to migration of mineralized fluids. Our inferred timing of the remagnetization associated with greigite growth represents the longest remanence acquisition delay documented in greigite-bearing clays of the Italian peninsula so far.
    Description: Published
    Description: 1049-1066
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: 2.3. TTC - Laboratori di chimica e fisica delle rocce
    Description: JCR Journal
    Description: reserved
    Keywords: Magnetostratigraphy ; Remagnetization ; Rock and mineral magnetization ; 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism ; 04. Solid Earth::04.05. Geomagnetism::04.05.07. Rock magnetism
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 16
    Publication Date: 2022-06-10
    Description: A biostratigraphic study was carried out on four sections of the Miocene Tufillo and Faeto formations (Southern Apennines). The sediments analysed were referred to the late Burdigalian - early Tortonian on the basis of planktonic foraminifers (MMi2b Sub-zone through the MMi8 Zone) and calcareous nannofossils (MNN3b Zone through the MNN7 Zone). Almost the majority of the bioevents of the recently published Miocene biozonal schemes of Mediterranean area were identified. Particularly, the marked changes in the abundance pattern of Paragloborotalia siakensis resulted very useful to correlate the sediments. A new acme abundance of the letter species has been recorded in the uppermost part of the Burdigalian planktonic foraminiferal EMMi2b Subzone. Moreover, the integrated calcareous plankton biostratigraphy revealed that the First Common Occurrence (FCO) of Sphenolithus heteromorphus occurs before the Last Occurrence (LO) of Catapsidrax dissimilis, in the upper part of Burdigalian record. This study indicates that the lower Langhian portion of the Tufillo Formation is characterized by arkose sandstones which pass upwards into calcarenites and/or calcirudites and marly deposits. Field data suggest that these sandstones directly overly the "Numidian Sandstones". The Faeto Formation starts with calcarenites and calcareous marls, in the calcareous nannofossil MNN3b Zone (Burdigalian), and lies on the "Numidian Standstones" as well. High-resolution sampling and biostratigraphy reveal that the deposition of the "Numidian Sandstones" ends in the late Burdigalian stage, just below the FCO of S.heteromorphus (MNN3b Zone) and the LO of C.dissimilis (MMi2b Subzone).
    Description: Published
    Description: 269-286
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: JCR Journal
    Description: reserved
    Keywords: Calcareous plankton biostratigraphy ; Early and Middle Miocene ; Mediterranean ; Faeto Formation ; Tufillo Formation ; Southern Apennines ; 04. Solid Earth::04.04. Geology::04.04.08. Sediments: dating, processes, transport ; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 17
    Publication Date: 2022-06-10
    Description: The San Bartolomeo Formation was established by CROSTELLA & VEZZAN(I1 964), and consists of about 1000 m thick siliciclastic and turbiditic sedimentary succession, which lies in angular unconformity over the Sannio Unit (PATACCA& SCANDONE, 2007). As far as the age, this formation has been controversially considered Serravallian -Tortonian (CROSTELLA & VEZZANI, 1964), Serravallian (TORTORICI1, 975), Langhian - Tortonian (PESCATORE, 1971; DAZZARO et alii, 1988), latemost Tortonian?/early Messinian (PATACCA & SCANDONE, 2007). Moreover the tectono-sedimentary environment of these deposits is also questionable considered: foredeep basin (Cocco el alii, 1972), piggy-back basin (Dazzaro et alii, 1988; Dl NOCERA el alii, 1988; PATACCAet alii, 1990), thrust- related basin (BOLANO, 2000), thrust-top or wedge -top basin (PESCATOReEt alii,1996; PESCATOREet alii, 2000) and thrust -sheet-top basin (PATACCA & SCANDONE, 2007'). The deposits of San Bartolomeo Formation widely outcrop in the center-eastem part of the geological map N. 405, Campobasso, of the National Geological Map Series of Italy (at scale 1:50,000). In this area the studied formation consists of a succession, about 600 m thick, of siliciclastic and turbiditic sediments composed by three main lithofacies: a) arenaceous and lor arenaceous-conglomerate; b) pelitic-arenaceous: and c) pelitic. The age of the investigated sediments was established on the basis of integrated calcareous plankton hiostratigraphy (calcareous nannofossils and planktonic foraminifera). A total of 164 samples were collected for biostratigraphic studies, with a sample resolution of 50 centimetres to 2 m, along seven stratigraphical sections, logged and measured between Casalciprano village, at North, and Baranello village at South.The analyses of calcareous nannofossil and planktonic foraminifera1 assemblages were performed following the procedures extensively used in Mediterranean and extra- Meditexanean biostratigraphic studies (Dl STEFANO el alii, 2008, and references therein), and the zonal assignment followed the biostratigraphic schemes of SPROVIEReIt alii (2002) and DI STEFANOet alii (2008). Based on the integrated biostratigraphic study the San Bartolomeo Formation, cropping out in Campobasso area, encompasses the early Serravallian - middlellate? Tortonian stratigraphic internal, between the calcareous nannofossil zones MNN6a and MNNBlMNN9, and the planktonic foraminiferal zones MMi5 through MMi 1 1. The biostratigraphic results presented and the detailed field observations carried out for mapping the Campobasso geological map, would suggest a reassessment of the San Bartolomeo Formation chronostratigraphy, the Sannio Unit paleogeographic position, and the tectono-sedimentary evolution of the Southern Apennines during the Serravallian age.
    Description: Unpublished
    Description: Pisa, Italy
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: restricted
    Keywords: Calcareous plankton biostratigraphy ; Middle and Late Miocene ; San Bartolomeo Formation ; Souther Apennines ; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Oral presentation
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  • 18
    Publication Date: 2022-06-10
    Description: New stratigraphic and biostratigraphic data arising from the realization of the Sheet No. 405 "Campobasso" of the new Geological map of Italy (1:50.000 scale - CARG Project) allowed, for the first time in this area, to stratigraphically and cartographically define all the ranges composing the basinal Sannio Unit Auct.. Structural analysis and the chronostratigraphic redefinition of siliciclastic deposits covering the Sannio Unit and the carbonate platform successions of the Matese- Frosolone Units, indicate two main evolutionary stages in the Miocene- Pliocene structuring of this portion of the Southern Apennines. In the first stage, starting before Serravallian times, E-verging contraction affected exclusively the basinal units together with their siliciclastic cover. During the second stage, beginning after early Messinian times, NE-verging compression involved both the basinal Sannio Unit and the Matese-Frosolone Units.
    Description: Unpublished
    Description: ISPRA - Roma, Italy
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: restricted
    Keywords: Sannio Unit ; Molise ; Southern Apennines ; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Oral presentation
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  • 19
    Publication Date: 2022-06-10
    Description: The present paper deals with the stratigraphic and biostratigraphic study of the middle-late Miocene thrust-top basin deposits of the San Bartolomeo Flysch, exposed north of Matese mountains and analysed during the geological survey of the sheet N° 405 Campobasso of the new Geological Map of Italy, 1:50.000 scale. The integrated study of calcareous nannofossils and planktonic foraminifera, based on the semi-quantitative distribution range of index species, revealed the presence of age-diagnostic assemblages which are comparable with those of different middle-late Miocene deep-marine sedimentary settings of the Mediterranean Basin. The biostratigraphic dataset suggests an early Serravallian – early middle Tortonian age. In terms of calcareous nannofossil biostratigraphy, the studied succession falls between the Last Occurrences of Sphenolithus heteromorphus and the First Occurrence of Discoaster bellus gr., corresponding to the MNN6 – MNN8 zone interval. In terms of planktonic foraminiferal biostratigraphy the studied sediments fall between the Last Occurrence of Globorotalia peripheroronda and the First Regular Occurrence of Neogloboquadrina acostaensis, corresponding to the MM6 p.p. - MMi10 p.p. zone interval. This study documents the applicability of the recent Mediterranean middle –late Miocene biozonations for the biostratigraphic study of siliciclastic synorogenic sediments, and challenges the most recent studies that dated the San Bartolomeo Flysch to the late Tortonian- early Messinian.
    Description: Published
    Description: 295-311
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: JCR Journal
    Description: restricted
    Keywords: Calcareous plankton biostratigraphy ; middle and late Miocene ; Mediterranean ; San Bartolomeo Flysch ; Southern Apennines ; 04. Solid Earth::04.04. Geology::04.04.08. Sediments: dating, processes, transport ; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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