Constraining the long-term evolution of the slip rate for a major extensional fault system in the central Aegean, Greece, using thermochronology

Brichau, Stéphanie; Ring, Uwe; Ketcham, Richard A.; Carter, Andrew; Stöckli, Daniel F.; Brunel, Maurice

doi:10.1016/j.epsl.2005.09.065

Cited by 129 publications

(176 citation statements)

References 53 publications

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“…5-8.5 kbar, 500-700°C) and associated migmatites also developed in the central Cyclades, such as in the Naxos, Paros, Mykonos and Ikaria islands [Jansen and Schuiling, 1976;Lister et al, 1984;Urai et al, 1990;Keay et al, 2001;Vanderhaeghe, 2004;Duchêne et al, 2006;Kruckenberg et al, 2011;Beaudoin et al, 2015;Laurent et al, 2015]. Exhumation of these rocks as MCCs was accommodated during the Oligocene-Miocene by several ductile-brittle detachment systems (figures 4 and 6) comprising the top-to-the NE North Cycladic Detachment System (NCDS) [Faure et al, 1991;Lee and Lister, 1992;Gautier and Brun, 1994;Mehl et al, 2005Mehl et al, , 2007Brichau et al, 2007Brichau et al, , 2008Jolivet et al, 2010a], the top-to-the N Naxos/Paros Extensional Fault System (NPEFS) [Urai et al, 1990;Gautier et al, 1993;Brichau et al, 2006;Seward et al, 2009;Bargnesi et al, 2013] and the top-to-the SW West Cycladic Detachment System (WCDS) [Grasemann and Petrakakis, 2007;Brichau et al, 2010;Iglseder et al, 2011;Grasemann et al, 2012]. The minimum offset of these extensional structures is estimated at 60-100 km for the NCDS [Jolivet et al, 2004a;Brichau et al, 2008] and ~50 km for the NPEFS (figure 3) [Brichau et al, 2006].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…In the Cyclades, the NCDS accommodated this exhumation since the Oligocene (figures 9 and 11) [Faure et al, 1991;Lee and Lister, 1992;Brichau et al, 2007Brichau et al, , 2008Jolivet et al, 2010a] while the NPEFS and the WCDS became active in the early Miocene [Urai et al, 1990;Gautier et al, 1993;Vanderhaeghe, 2004;Brichau et al, 2006;Seward et al, 2009;Iglseder et al, 2011;Grasemann et al, 2012]. Syntectonic sediments started to be deposited in the hanging wall of these extensional structures [Photiades, 2002;Sánchez-Gómez et al, 2002;Kuhlemann et al, 2004;Lecomte et al, 2010;Laurent et al, 2015].…”

Section: Back-arc Extension In the Cyclades And Western Anatoliamentioning

confidence: 99%

“…Tectonic map showing the main data used to constrain the kinematic evolution of the eastern Mediterranean region, including the stretching lineations in the MCCs [Rimmelé et al, 2006;Bonev and Beccaletto, 2007;Jolivet et al, 2013], the offset of main structures [Armijo et al, 1999;Jolivet et al, 2004aJolivet et al, , 2010bBrichau et al, 2006Brichau et al, , 2008 and the vertical-axis rotations deduced from paleomagnetic studies [Kissel and Laj, 1988;Kissel et al, 1993Kissel et al, , 2003Pǎtraşcu et al, 1994;Morris and Anderson, 1996;van Hinsbergen et al, 2005avan Hinsbergen et al, , 2008van Hinsbergen et al, , 2010aBrun and Sokoutis, 2007;Bradley et al, 2013]. CW: clockwise rotation.…”

Section: Figurementioning

confidence: 99%

“…Exhumation of these rocks as MCCs was accommodated during the Oligocene-Miocene by several ductile-brittle detachment systems (figures 4 and 6) comprising the top-to-the NE North Cycladic Detachment System (NCDS) [Faure et al, 1991;Lee and Lister, 1992;Gautier and Brun, 1994;Mehl et al, 2005Mehl et al, , 2007Brichau et al, 2007Brichau et al, , 2008Jolivet et al, 2010a], the top-to-the N Naxos/Paros Extensional Fault System (NPEFS) [Urai et al, 1990;Gautier et al, 1993;Brichau et al, 2006;Seward et al, 2009;Bargnesi et al, 2013] and the top-to-the SW West Cycladic Detachment System (WCDS) [Grasemann and Petrakakis, 2007;Brichau et al, 2010;Iglseder et al, 2011;Grasemann et al, 2012]. The minimum offset of these extensional structures is estimated at 60-100 km for the NCDS [Jolivet et al, 2004a;Brichau et al, 2008] and ~50 km for the NPEFS (figure 3) [Brichau et al, 2006]. The low-grade Upper Cycladic unit composing the hanging wall of these detachment systems is the equivalent of the Pelagonian nappe, essentially consisting of ophiolitic material related to the Jurassic Vardar ophiolites (e.g.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Ma ago below the WCDS (figures 9 and 11) [Brichau et al, 2006[Brichau et al, , 2008[Brichau et al, , 2010Jolivet et al, 2010a]. Surface exposure of the metamorphic rocks then occurred in the late Miocene (figure 11) [Sánchez-Gómez et al, 2002].…”

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confidence: 99%

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Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Back-arc Extension In the Cyclades And Western Anatoliamentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

mentioning

confidence: 99%

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Timing, rate, and magnitude of slip on the Buckskin‐Rawhide detachment fault, west central Arizona

et al. 2014

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We present thermochronologic and geochronologic data that constrain the slip history of the Buckskin-Rawhide detachment fault in west central Arizona, one of the largest extensional fault systems in the North American Cordillera. (U-Th)/He zircon and apatite thermochronology, integrated with 40 Ar/ 39 Ar geochronology of postdetachment volcanic rocks, indicate that large-magnitude extension associated with the detachment fault initiated at~21-20 Ma and continued until~12-11 Ma in the southwestern portion of the Buckskin-Rawhide metamorphic core complex. (U-Th)/He footwall cooling ages from the breakaway zone in the western Bouse Hills to upper greenschist-facies mylonites in the southern Buckskin Mountains indicate that the slip rate on the detachment fault was 3 + 1.5/À1 km/Myr during the early Miocene. Space-time patterns of hanging wall tilting suggest that at 17-16 Ma, a secondary detachment fault breakaway developed 12 km northeast of the primary detachment fault breakaway. Proximal conglomerates deposited in a supradetachment basin adjacent to the secondary breakaway scarp were displaced 6-11 km northeast in the middle Miocene by the Buckskin-Rawhide detachment fault at a slip rate of 1.2-2.7 km/Myr. The total displacement across the detachment fault in the southwestern portion of the core complex is 24 ± 10 km, well short of the previous estimate of 66 ± 8 km across the entire core complex. Based on these data and new observations, we propose that total displacement on the Buckskin-Rawhide detachment fault system increases in the slip direction to~40-50 km at the northeastern end of the exposed footwall, corresponding to time-averaged slip rates that ranged from~2 km/Myr to ≤6 km/Myr across the entire core complex.

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Exhumation kinematics of the Cycladic Blueschists unit and back-arc extension, insight from the Southern Cyclades (Sikinos and Folegandros Islands, Greece)

et al. 2015

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Current models for the Oligo-Miocene postorogenic back-arc extension of the Aegean domain suggest that stretching is accommodated by two bivergent detachment systems of opposing shear sense. The coexistence in the Eocene of a top-to-the-south thrust at the base of the Cycladic Blueschists unit and top-to-the-north extensional shear zones at the roof raises the problem of differentiating synorogenic and postorogenic deformations with similar directions and shear senses. Based on structural field data, this study shows that the postorogenic deformation recorded in the Southern Cyclades is extremely asymmetric as the Cycladic Blueschists unit is pervasively affected by top-to-the-north shearing deformation distributed on four main shear zones. All activated in greenschist-facies conditions, some of these shear zones operated in the brittle regime during the final part of the exhumation. The Cycladic Blueschists/Cycladic Basement contact displays clear polyphased deformation with the preservation of top-to-the-south thrust kinematics. Thermal structure of the Cycladic Blueschists unit with regard to position of ductile shear zones was retrieved using the Raman Spectroscopy of Carbonaceous Material peak-metamorphic temperatures. This study shows a series of major metamorphic gaps accommodating an upward and stepwise decrease of more than 200°C within the Cycladic Blueschists unit. Pressure-temperature estimates show that only lower parts of the Cycladic Blueschists unit recorded approximately 18-20 kbar for 530°C peak conditions. While flanking the West Cycladic Detachment System, which shows a top-to-the-south shear sense, the Southern Cyclades are dominated by a top-to-the-north noncoaxial shearing. Deformation is therefore genuinely asymmetric in the center of the Aegean domain.

show abstract

Constraining the long-term evolution of the slip rate for a major extensional fault system in the central Aegean, Greece, using thermochronology

Cited by 129 publications

References 53 publications

Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

Timing, rate, and magnitude of slip on the Buckskin‐Rawhide detachment fault, west central Arizona

Exhumation kinematics of the Cycladic Blueschists unit and back-arc extension, insight from the Southern Cyclades (Sikinos and Folegandros Islands, Greece)

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