Options
Satolli, S.
Loading...
Preferred name
Satolli, S.
4 results
Now showing 1 - 4 of 4
- PublicationRestrictedUnderstanding progressive-arc- and strike-slip-related rotations in curve-shaped orogenic belts: The case of the Olevano-Antrodoco-Sibillini thrust (Northern Apennines, Italy)(2013-02-07)
; ; ; ; ; ;Turtù, A.; Dipartimento di Ingegneria e Geologia, Università “G. D’Annunzio” di Chieti-Pescara, Chieti, Italy. ;Satolli, S.; Dipartimento di Ingegneria e Geologia, Università “G. D’Annunzio” di Chieti-Pescara, Chieti, Italy. ;Maniscalco, R.; Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Università degli Studi di Catania, Catania, Italy. ;Calamita, F.; Dipartimento di Ingegneria e Geologia, Università “G. D’Annunzio” di Chieti-Pescara, Chieti, Italy. ;Speranza, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; ; ; ; We report on a paleomagnetic study of the southern sector of the Olevano-Antrodoco-Sibillini (OAS) thrust front, which corresponds to the southern limb of the Northern Apennines (Italy) orogenic salient. A lively debate has developed regarding the oroclinal/progressive-arc versus non-rotational nature of the OAS, which has been alternatively interpreted as a dextral strike-slip fault, dextral transpressive fault, or frontal to oblique ramp that reactivated pre-existing Jurassic normal faults. Here, we document the paleomagnetism, integrated with biostratigraphic and structural data, of 52 new sites from both the OAS hanging wall and footwall. On the basis of 39 retained sites, we find a peculiar pattern of tectonic rotations along the OAS thrust that evidences four rotational domains. The thrust footwall is characterized by a southern domain that undergoes an approximately 30 counterclockwise rotation with respect to the stable foreland, and an approximately nonrotated domain. The data from the hanging wall indicate the occurrence of a dextral strike-slip component along the southern sector of the OAS thrust supported by a strong clockwise rotation close to the NE-SW lateral ramp, which rapidly fades 1 km from the thrust front. A slight but significant CW rotation observed in the remaining sites from the hanging wall confirms the progressive nature of the OAS, and its structural position as the southern limb of the Northern Apennines salient. Our detailed paleomagnetic study is crucial in discriminating between progressive-arc- and strike-slip-related components in the main curved orogenic front of the Northern Apennines.262 33 - PublicationRestrictedPaleomagnetism of the Gran Sasso range salient (central Apennines, Italy): Pattern of orogenic rotations due to translation of a massive carbonate indenter(2005)
; ; ; ;Satolli, S.; Dipartimento di Scienze della Terra, Università G. D’Annunzio, Chieti Scalo, Italy ;Speranza, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Calamita, F.; Dipartimento di Scienze della Terra, Università G. D’Annunzio, Chieti Scalo, Italy; ; We report on the paleomagnetism (39 new sites) of Gran Sasso, an indenter-controlled salient of the external central Apennines formed by two orthogonal limbs. We find that Gran Sasso is a complex salient, paleomagnetically corresponding to neither a nonrotating nor an oroclinal end-member. Data from the core of the arc show that the indenter itself did not undergo any rotation. Conversely, rotations of variable magnitude and sign are observed along the curveshaped thrust fronts. Rotations are virtually absent at both end points of the arc. Moving toward the apex, progressively greater counterclockwise (CCW) and clockwise (CW) rotations occur along the E-Wand N-S fronts, respectively. The rotations increase continuously and more than linearly, reaching their maximum values (80 CCWand 50 CW) around the apex. Here, the more strongly CCW and CW rotated fronts are separated by a domain characterized by local block rotations. The inequality between the maximum CCW and CW rotation values is likely a consequence of the asymmetry of the indenter displacement direction (N70 E) with respect to the preorogenic trends of its margins (E-W and N-S). From an oroclinal point of view, the fronts close to the end points virtually define a nonrotating arc, while the pattern around the apex is similar to that of an orocline. We conclude that close to end points, nonrotational thrusting normal to the indenter margins occurred, while in the vicinity of the apex, the peritidal carbonates acted as an "ice breaker", pushing apart (and strongly rotating) the weaker multilayer located ahead.141 28 - PublicationRestrictedMagnetic stratigraphy of Kimmeridgian-Aptian sections from Umbria-Marche (Italy): New details on the M polarity sequence(2005)
; ; ; ; ;Speranza, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Satolli, S.; Dipartimento di Scienze della Terra, Università di Chieti, Chieti, Italy ;Mattioli, E.; Centre de Sciences de la Terre, Université Claude Bernard Lyon 1, Villeurbanne, France ;Calamita, F.; Dipartimento di Scienze della Terra, Università di Chieti, Chieti, Italy; ; ; The magnetic stratigraphy of the Maiolica and Calcari ad Aptici pelagic limestones is documented from four Umbro-Marchean land sections (Italy). The overall biostratigraphic age of the sampled strata encompasses the whole Kimmeridgian–Lower Aptian. The data were gathered from two new sections (Arcevia, Contessa) and by resampling more densely than in the past two additional classical sections (Bosso, Gorgo a Cerbara). A detailed record of the polarity chrons M21n-M14 and M9-M0 was derived, and no difference was observed with respect to the sequence of M polarity chrons inferred from oceanic magnetic anomalies. Barely measurable remanent magnetization from chron M14 to M10n at Contessa concurred with previous evidence from Bosso, indicating that the Maiolica from Umbria-Marche is characterized by a "recording gap" during chrons M14n to M11, possibly due to diagenetic magnetite dissolution related to the Late Valanginian carbon isotope event. At Arcevia and Bosso, the boundary between Maiolica and Calcari ad Aptici occurs at the top of chron M19n and in the upper part of chron M20n, respectively, showing that the onset of Maiolica sedimentation may be diachronous by 1.5–2 Myr along the Umbria-Marche domain. Arcevia is the most expanded Mid-Upper Tithonian land section documented so far. Here, the subchrons M20n-1 and M19n-1 are found to represent 3.2% and 10.1% in time of chrons M20n and M19n, respectively. Evidence is also provided for a reversal excursion occurring within the M20n-1 subchron. At Bosso, an excursion and a reversal excursion were found within chrons M16n and M16, respectively.174 28 - PublicationRestrictedThe 125–150 Ma high-resolution Apparent Polar Wander Path for Adria from magnetostratigraphic sections in Umbria–Marche (Northern Apennines, Italy): Timing and duration of the global Jurassic–Cretaceous hairpin turn(2007-03)
; ; ; ; ;Satolli, S.; Earth Science Department, “G. d'Annunzio” University of Chieti-Pescara, Italy ;Besse, J.; Laboratoire de Géomagnétisme et Paléomagnétisme, Institut de Physique du Globe de Paris, France ;Speranza, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Calamita, F.; Earth Science Department, “G. d'Annunzio” University of Chieti-Pescara, Italy; ; ; A new high-resolution Apparent Polar Wander Path (APWP) segment has been obtained from the magnetostratigraphy of four Kimmeridgian to Lower Aptian sections in the Northern Apennines (Italy). The use of paleomagnetic data for determination of the Adria APWP was hampered by the large local rotations linked to Apennine tectonics, characterized by folds and thrusts developed during the Neogene. To overcome this problem, we have computed relative rotations between time overlapping sections and realigned them in a common declination reference frame (namely the Bosso section). We synthesized a new high-resolution 150 to 125 Ma APWP for Adria, which has a similar shape to the time-equivalent segment of the synthetic APWP of Africa of Besse and Courtillot [J., Besse, V., Courtillot, Apparent and true polar wander and the geometry of the geomagnetic field over the last 200 Myr, J. Geophys. Res. 107(B11) (2002), doi:10.1029/200JB000050]. A 26° clockwise rotation of our combined Adria APWP places it in almost perfect overlap with African data of same age, confirming that the Adria promontory moved coherently with Africa during this time span, whereas the counterclockwise rotation of Adria with respect to Africa was introduced later, most probably during Apennines orogenesis. Finally, we discuss in relation with worldwide plate evolution the peculiar shape of our APWP, which displays a hairpin turn during Berriasian time, and dates the main Late Jurassic/Early Cretaceous change in plate motion at around anomaly M16.383 71