Clay mineralogical and isotopic (K–Ar, δ18O, δD) constraints on the evolution of the North Anatolian Fault Zone, Turkey

Uysal, I. Tonguç; Mutlu, Halim; Altunel, Erhan; Karabaçak, Volkan; Golding, Suzanne D.

doi:10.1016/j.epsl.2005.12.025

Cited by 63 publications

(48 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The short heating times of transient fault-related hydrothermal activity or frictional heating (as compared with the long-lasting temperature changes of regional metamorphism) make it even less likely that illite ages are reset unless temperatures significantly exceed the illite closure temperature (e.g., Zwingmann et al, 2010a;Torgersen et al, 2014). Thus, age dispersion in faults has only in rare cases been explained by grain size-dependent thermal resetting (e.g., Uysal et al, 2006;Zwingmann et al, 2010a).…”

Section: Illite and Temperaturementioning

confidence: 99%

Post-Caledonian brittle deformation in the Bergen area, West Norway: results from K–Ar illite fault gouge dating

Ksienzyk¹,

Wemmer²,

Jacobs³

et al. 2016

NJG

View full text Add to dashboard Cite

Post-Caledonian extension during orogenic collapse and Mesozoic rifting in the West Norway-northern North Sea region was accommodated by the formation and repeated reactivation of ductile shear zones and brittle faults. Offshore, the Late Palaeozoic-Mesozoic rift history is relatively well known; extension occurred mainly during two rift phases in the Permo-Triassic (Phase 1) and Mid-Late Jurassic (Phase 2). Normal faults in the northern North Sea, e.g., on the Horda Platform, in the East Shetland Basin and in the Viking Graben, were initiated or reactivated during both rift phases. Onshore, on the other hand, information on periods of tectonic activity is sparse as faults in crystalline basement rocks are difficult to date. KAr dating of illite that grows synkinematically in fine-grained fault rocks (gouge) can greatly help to determine the time of fault activity, and we apply the method to nine faults from the Bergen area. The K-Ar ages are complemented with X-ray diffraction analyses to determine the mineralogy, illite crystallinity and polytype composition of the samples. Based on these new data, four periods of onshore fault activity could be defined: (1) the earliest growth of fault-related illite in the Late Devonian-Early Carboniferous (>340 Ma) marks the waning stages of orogenic collapse; (2) widespread latest Carboniferous-Mid Permian (305-270 Ma) fault activity is interpreted as the onset of Phase 1 rifting, contemporaneous with rift-related volcanism in the central North Sea and Oslo Rift; (3) a Late Triassic-Early Jurassic (215-180 Ma) period of onshore fault activity postdates Phase 1 rifting and predates Phase 2 rifting and is currently poorly documented in offshore areas; and (4) Early Cretaceous (120-110 Ma) fault reactivation can be linked either to late Phase 2 North Sea rifting or to North Atlantic rifting.

show abstract

Section: Illite and Temperaturementioning

confidence: 99%

Post-Caledonian brittle deformation in the Bergen area, West Norway: results from K–Ar illite fault gouge dating

Ksienzyk¹,

Wemmer²,

Jacobs³

et al. 2016

NJG

View full text Add to dashboard Cite

show abstract

“…Others argue that the principal (northern) fault strand in the Sea of Marmara was not established until 200 ka [Şengör et al, 2005]. There is still some uncertainty surrounding the age of strike-slip faulting along the NAF [Uysal et al, 2006]. The eastern end of the NAF has evolved in response to changes in the amount of deformation accommodated on various conjugate structures, namely the currently dominant East Anatolian Fault and previously dominant Ovacık Fault (Figure 1) Westaway, 2003].…”

Section: Age and Total Offsetmentioning

confidence: 99%

Recent behavior of the North Anatolian Fault: Insights from an integrated paleoseismological data set

2010

View full text Add to dashboard Cite

The North Anatolian Fault (NAF) is a right‐lateral plate boundary fault that arcs across northern Turkey for ∼1500 km. Almost the entire fault progressively ruptured in the 20th century, its cascading style indicating that stress from one fault rupture triggers fault rupture of adjacent segments. Using published paleoseismic investigations, this study integrates all of the existing information about the timing of paleoearthquakes on the NAF. Paleoseismic investigation data are compiled into a database, and for each site a Bayesian, ordering‐constrained age model is constructed in a consistent framework. Spatial variability of recurrence intervals suggests a spatial pattern in the behavior of earthquakes on the NAF that may correspond to the tectonic provinces within the Anatolian plate. In the west, the shear stress associated with the escaping Anatolian plate interplays with the tensile stress associated with the Aegean extensional province. Along this western transtensional section we recognize short recurrence intervals and switching between the furcated fault strands. The central section of the NAF is translational with little influence of fault‐normal stresses from other tectonic sources. This section tends to rupture in unison or close succession. The eastern section of the NAF is transpressional due to the compressional fault‐normal stress associated with the indenting Arabian plate. Along this section the recurrence intervals are bimodal, which we attribute to variable normal stress, although there are other possible causes.

show abstract

“…Fault gouge is predominantly associated with the mechanical recycling of protolith host rock but can also involve fault-related mineralization Yan et al 2001;Uysal et al 2006). The fault-gouge sample from the Carmel Fault Zone (sample N1) is composed of a calcite and dolomite mixture (Table 1), and the SEM image indicates that a large part of the fault gouge is, in fact, newly grown euhedral calcite grains (Fig.…”

Section: Calcite Precipitates In the Carmel Faultmentioning

confidence: 99%

Formation of fault-related calcite precipitates and their implications for dating fault activity in the East Anatolian and Dead Sea fault zones

Nuriel

Rosenbaum

Uysal

et al. 2011

View full text Add to dashboard Cite

Fault-related calcite precipitates taken from different segments along the East Anatolian (SE Turkey) and Dead Sea (Israel) fault zones were investigated structurally, geochemically and geochronologically. The results indicate major differences in the nature of calcite precipitates and temporal relationship to faulting. In the Düziçi Fault, calcite-filled veins and hydraulic fractures precipitated co-seismically during three consecutive faulting events. Calcite precipitated in veins at the Har Zefiyya Fault was controlled by near-surface karst processes. Initial opening of the veins occurred prior to about 500 ka and may represent the onset of an east-west contractional deformation. In the Carmel Fault Zone the calcite coating the fault plane precipitated by karst processes, with no evidence of subsequent deformation. Calcite fault gouge from the same site are a mix of host-rock gouge and newly formed authigenic calcite, and their overall geochemistry suggests pervasive fluid-rock interaction in the fault zone. In the Baraq Fault Zone the precipitation of calcite within syntectonic tension gashes and veins occurred prior to 540 ka by the pervasive infiltration of meteoric water into the fault zone. The results demonstrate that geochemical and structural analyses, combined with U-Th geochronology, can shed light on co-seismic and interseismic fault activity, and can potentially provide precise age constraints on the timing of brittle deformation.

show abstract

Clay mineralogical and isotopic (K–Ar, δ18O, δD) constraints on the evolution of the North Anatolian Fault Zone, Turkey

Cited by 63 publications

References 50 publications

Post-Caledonian brittle deformation in the Bergen area, West Norway: results from K–Ar illite fault gouge dating

Post-Caledonian brittle deformation in the Bergen area, West Norway: results from K–Ar illite fault gouge dating

Recent behavior of the North Anatolian Fault: Insights from an integrated paleoseismological data set

Formation of fault-related calcite precipitates and their implications for dating fault activity in the East Anatolian and Dead Sea fault zones

Contact Info

Product

Resources

About