Extensional crustal tectonics and crust-mantle coupling, a view from the geological record

Jolivet, Laurent; Menant, Armel; Clerc, Camille; Sternai, Pietro; Bellahsen, Nicolas; Leroy, Sylvie; Pik, Raphaël; Stab, Martin; Faccenna, Claudio; Gorini, Christian

doi:10.1016/j.earscirev.2018.09.010

Cited by 44 publications

(25 citation statements)

References 168 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Subsequently, the entire subduction system reached an extensional stage that gave rise to a 1,000‐km‐wide stretched region with widespread extension‐related basins, domes/MCCs, and magmatism (Figure d). Such a tectonic scenario is similar to that described in the Cenozoic Basin and Range Province in the western United States (Davis & Lister, ; Dickinson, ; Sonder & Jones, ) or the Aegean Sea (Jolivet et al, , ; Jolivet & Brun, ), where the lithosphere is highly extended to produce numerous MCCs and domes.…”

Section: Discussionsupporting

confidence: 59%

Cretaceous Episodic Extension in the South China Block, East Asia: Evidence From the Yuechengling Massif of Central South China

et al. 2019

View full text Add to dashboard Cite

In the Cretaceous, the subduction of the Izanagi/Paleo-Pacific plates beneath the South China Block (SCB) created a wide back-arc domain characterized by numerous extensional basins coeval with voluminous magmatism. The SCB witnessed the whole evolution by records of widespread extensional structures to accommodate the lithospheric stretching. In the interior of the SCB, the Yuechengling (YCL) Massif preserves a large, low-angle detachment fault, the Ziyuan Detachment (ZYD) at the western margin, and a high-angle ductile normal fault, the Tianhu Fault (THF), in the middle of the massif. Both faults display ductile shearing with top-to-the west kinematics but play different roles in two stages of extension. In the early stage at 140-120 Ma, the THF deformed the eastern YCL pluton at a temperature of~350°C, but the ZYD shows limited movement at this time. On the contrary, the later stage (100-85 Ma) is characterized by pervasive middle-to high-temperature deformation (~400-500°C) and rapid exhumation along the ZYD, but the THF only underwent a near-surface brittle overprint. Across the SCB, the two-phase extension is widely recorded in other extensional structures and coincides with magmatic flare-ups at its eastern margin, suggesting episodic changes in the subduction dip. Combined with two compressional events that took place between the intervals of extension, the SCB experienced two cycles of compression-extension at 155-120 and 120-85 Ma. This periodicity is tentatively interpreted as a combined effect from the Izanagi/Paleo-Pacific subduction angle change and a thickening-foundering process in the arc region.

show abstract

Section: Discussionsupporting

confidence: 59%

Cretaceous Episodic Extension in the South China Block, East Asia: Evidence From the Yuechengling Massif of Central South China

et al. 2019

View full text Add to dashboard Cite

show abstract

“…(2018) dates another extensional and rollback phase related to subduction in central Anatolia to about 80–43 Ma, implying that some slab fragmentations may be older than previously thought. The latest strong extensional phase (past 10–15 million years) in the Aegean (Wortel & Spakman, 2000) as well as mantle flow through the tear and around the slab (Jolivet et al., 2018) could produce strong anisotropy, which may affect imaging the velocity structures of the upper mantle. Eastern Anatolia and Arabia started colliding about 30–35 Ma (Jolivet & Faccenna, 2000); after the closure of the Bitlis suture (16 Ma, Govers & Fichtner, 2016), the slab's dipping angle steepened.…”

Section: Introductionmentioning

confidence: 99%

Influence of Upper Mantle Anisotropy on Isotropic P‐Wave Tomography Images Obtained in the Eastern Mediterranean Region

et al. 2020

View full text Add to dashboard Cite

Seismic body‐wave tomography studies typically assume an isotropic upper mantle, possibly mapping anisotropy into artificial isotropic velocity anomalies in the resulting images. The Eastern Mediterranean with its oceanic, continental, and extinct subduction systems, as well as dense station coverage, provides an ideal setting to explore this issue. To examine the influence of seismic anisotropy, our study deals with both synthetic and real data inversions in which realistic seismic anisotropy models derived from 3D mantle convection simulations and shear wave splitting measurements are taken as a priori constraints. Spatial large‐scale velocity perturbations are mostly consistent between models derived with and without considering anisotropy. Small differences in the magnitude (up to 2%) and shape of velocity perturbations occur, and some structures are less diffuse when including anisotropy. Additionally, good backazimuthal coverage of teleseismic events and a larger data set improve the resolution of our model with respect to previous tomography studies and allow us to better interpret first‐order isotropic velocity anomalies. Key features, such as the half‐arc subducting oceanic plate in the southern Aegean and a wide and deep tear in the slab beneath southwestern Turkey, are clearly visible in all models. Our final tomography images also provide evidence for a shallow horizontal tear in the northern Hellenides and a vertical tear between two parts of the Cyprian slab. In eastern Anatolia, slab‐related high‐velocity anomalies are absent due to the continental collision and break‐off.

show abstract

“…This new-coming subduction signed the onset of the Apennines-Sicilian-Maghrebide subduction system that is still partly active today. Then, the Oligocene widespread crustal extension affecting the European margin gradually dismembered the Pyrénées-Provence belt, the Alpine foreland (Corso-Sarde blocks) and the Alpine-Betic chain signing the onset of back-arc basins that now constitute Western Mediterranean (e.g., Jolivet et al, 2018).…”

Section: Ii13 -Paleogenementioning

confidence: 99%

Structural and tectono-stratigraphic review of the Sicilian orogen and new insights from analogue modeling

Henriquet

Dominguez

Barreca

et al. 2020

Earth-Science Reviews

View full text Add to dashboard Cite

The Apennines-Sicilian-Maghrebian fold-and-thrust belt originated from the subduction of the Alpine Tethys and the later collision of drifted continental blocks against the African and Apulian paleomargins. From North to South, the Sicilian Fold-and-Thrust Belt (SFTB) is divided in four main tectono-stratigraphic domains: (1) the Calabro-Peloritani terrane, drifted from the European margin, (2) the remnants of the Alpine Tethys accretionary Wedge (ATW) related to the subduction of the Tethys, (3) the folded and thrusted platform (Panormide) and deep-water (Imerese-Sicanian) series of the offscrapped African margin, and

show abstract

Extensional crustal tectonics and crust-mantle coupling, a view from the geological record

Cited by 44 publications

References 168 publications

Cretaceous Episodic Extension in the South China Block, East Asia: Evidence From the Yuechengling Massif of Central South China

Cretaceous Episodic Extension in the South China Block, East Asia: Evidence From the Yuechengling Massif of Central South China

Influence of Upper Mantle Anisotropy on Isotropic P‐Wave Tomography Images Obtained in the Eastern Mediterranean Region

Structural and tectono-stratigraphic review of the Sicilian orogen and new insights from analogue modeling

Contact Info

Product

Resources

About