Active tectonics of the outer northern Apennines: Adriatic vs. Po Plain seismicity and stress fields

Mazzoli, Stefano; Santini, Stefano; Macchiavelli, Chiara; Ascione, Alessandra

doi:10.1016/j.jog.2014.10.002

Cited by 21 publications

(22 citation statements)

References 67 publications

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“…In this paper, the conjugate shear joint occurrence is corrected by the stereo projection analysis software Stereonet 10.0, and the a shear joint inversion tectonic stress field is insufficient, and the reliability of conjugate shear joint inversion is greatly improved. Therefore, conjugate shear joints are commonly used in geological research to invert paleo-tectonic stress fields (Negrete-Aranda et al, 2010;Federico, Crispini, & Capponi, 2010;Veloso et al, 2015;Mazzoli, Santini, Macchiavelli, & Ascione, 2015;Naimi-Ghassabian, Khatib, Nazari, & Heyhat, 2015). The distribution of joints produced by the same tectonic stress field has a certain regularity, usually a large area is developed in the rock mass to form a specific structural pattern.…”

Section: Principle Of Inversion Of Paleotectonic Stress Field By Conjmentioning

confidence: 99%

“…When using the shear joints in the inclined rock to carry out the stress field inversion, the joint production needs to use and principal stress axis direction of the tectonic stress field is analyzed by the software. Conjugate shear joint inversion of paleo-tectonic stress fields has been successfully used in several studies (Federico et al, 2010;Mazzoli et al, 2015;Foeken, Bertotti, & Dunai, 2006).…”

Section: Principle Of Inversion Of Paleotectonic Stress Field By Conjmentioning

confidence: 99%

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Paleo-tectonic Stress Field and Tectonic Evolution since the Mesozoic in the Eastern Mining Area of Pingdingshan

Gong

2019

Earth sci. res. j.

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By observing a large number of conjugate shear joint data in the field and underground of the study area, the conjugate shear joint data is analyzed by the stereographic projection method, and the paleo-tectonic stress field experienced in the mining area since the Mesozoic is inferred. Based on the above research, the tectonic evolution process of the eastern mining area of Pingdingshan is discussed from the aspect of dynamic mechanism. The results show that: (1) The eastern mining area of Pingdingshan experienced the Indosinian, Yanshan early-middle, Yanshanian, and Xishanian tectonic stress fields, with the directions of NS, NW, NE, and NNE, respectively. (2) The tectonic evolution of the mining area can be divided into four stages: (a) The Indosinian tectonic stress field has the weakest effect on the study area, the coal-bearing strata are gradually uplifted by the stress field in this period, and some small structures are formed in the coal-bearing strata; (b) The early-middle Yanshanian tectonic stress field has a certain transformation effect on the coal-bearing strata in the eastern part of Pingdingshan. It mainly forms the secondary structure of the mining area such as Huoyan normal fault and small fault-fracture structure; (c) The late Yanshanian tectonic stress field has the strongest effect, and the control complex fold structure with the axis near NW direction is formed under the tectonic stress field of this period, such as Likou syncline, Baishishan anticline, Lingwushan syncline, Guozhuang anticline, Niuzhuang syncline, etc. The near-NW direction of the control fault structure is also formed under the action of the late Yanshanian tectonic stress field, such as the Niuzhuang reverse fault, the original No.11 mine reverse fault, etc.; (d) The Himalayan tectonic stress field mainly forms some secondary and small structures in the mining area and has a certain transformation effect on the structure formed by the early tectonic stress field. The tectonic pattern of the eastern mining area of Pingdingshan is the result of the above-mentioned tectonic stress field acting in sequence with the coal-bearing strata, causing structural deformation of the coal seam.

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Section: Principle Of Inversion Of Paleotectonic Stress Field By Conjmentioning

confidence: 99%

Section: Principle Of Inversion Of Paleotectonic Stress Field By Conjmentioning

confidence: 99%

Paleo-tectonic Stress Field and Tectonic Evolution since the Mesozoic in the Eastern Mining Area of Pingdingshan

Gong

2019

Earth sci. res. j.

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“…The mechanism of the 19 October 2017 shock is taken from http://cnt.rm.ingv.it. Black focal mechanisms are provided by Vannucci and Gasperini (), Boncio and Bracone (), and Mazzoli et al (). Historical earthquakes occurred near the points considered are indicated in blue.…”

Section: Analysis Of the Postseismic Strain Stylementioning

confidence: 99%

“…According to some authors, the deformation of this zone is controlled by the advancement of the buried Apennine thrusts on the Adriatic foreland, causing a compressional regime with shortening axis approximately perpendicular to the coast line (e.g., Boncio & Bracone, ). According to another interpretation, the activity of the buried thrusts has considerably slowed down from the end of the Lower Pleistocene (e.g., Mazzoli et al, ). Current seismotectonic activity would be instead driven by a transpressive regime with shortening axis oblique with respect to the outer Apennine front.…”

Section: Analysis Of the Postseismic Strain Stylementioning

confidence: 99%

Strain Diffusion from the 30 October 2016 Norcia (Central Italy) Earthquake

Viti

2019

Tectonics

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We have modeled the propagation of the perturbation induced by the 30 October 2016 Norcia (Central Italy) earthquake by a two‐dimensional finite element procedure based on strain diffusion in the crust‐mantle system. This approach simulates the excitation of an elastic‐viscous medium by the coseismic slip related to the above seismic event. We have analyzed the temporal evolution of the expected planar strain and strain rate at selected points of the model, located near active fault systems of the Central and Northern Apennines. Moreover, the strain style (i.e., the ratio of the principal axes of the planar strain tensor) computed at each selected point is compared with available tectonic and seismological information concerning the active strain regime. Finally, we discuss the possible influence of postseismic strain perturbation on major fault systems of the Central and Northern Apennines.

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“…thrusting-vs. strike-slip-dominated active stress field; e.g. Di Vannoli et al, 2004;Basili & Barba, 2007;Santini et al, 2011;Kastelic et al, 2013;Mazzoli et al, 2014Mazzoli et al, , 2015. Improving our understanding of the rheology of this sector of the Apennine orogen is fundamental in order to carry out meaningful seismotectonic analysis and modeling.…”

Section: Introductionmentioning

confidence: 99%

Thermal Structure of the Outer Northern Apennines along the CROP-03 Profile

Santini¹,

Mazzoli²,

Megna³

et al. 2016

JGG

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In this study, we elaborated a 2D model that reproduces the thermal structure of the central-northern Adriatic offshore and adjacent onshore area of the Italian peninsula. Based on the crustal structure along the trace of the CROP-03 deep section, the geotherms offshore Gabicce (northern Marche region) were obtained by an analytical procedure taking into account the role of thrusting within the sedimentary cover. Basement involvement at depth beneath the neighbouring Mondaino area to the SW, where a crustal thrust ramp dips towards the hinterland, required the use of a different analytical procedure. The results obtained in this study allowed us to define a satisfactory description of the thermal state of the northern Marche coastal area and adjacent Adriatic offshore. These results, integrated with those obtained by previous studies, confirm that the isotherms of 250°C and 400°C are placed in the stable Adriatic lithosphere at depths of about 11 km and 22 km, respectively. Furthermore, the 400°C isotherm is deeper in the onshore area, reaching a depth of about 30 km in the zone comprised between Gabicce and Mondaino, whereas the 250°C isotherm deepens towards the SW along the Adriatic Sea sector, to reach a maximum depth of 13 km in coastal area, rising again at a depth of 11 km in the innermost sector of the studied section.

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Active tectonics of the outer northern Apennines: Adriatic vs. Po Plain seismicity and stress fields

Cited by 21 publications

References 67 publications

Paleo-tectonic Stress Field and Tectonic Evolution since the Mesozoic in the Eastern Mining Area of Pingdingshan

Paleo-tectonic Stress Field and Tectonic Evolution since the Mesozoic in the Eastern Mining Area of Pingdingshan

Strain Diffusion from the 30 October 2016 Norcia (Central Italy) Earthquake

Thermal Structure of the Outer Northern Apennines along the CROP-03 Profile

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