scholarly journals Tectonic geomorphology and Plio-Quaternary structural evolution of the Tuzgölü fault zone, Turkey: Implications for deformation in the interior of the Central Anatolian Plateau

Geosphere ◽  
2020 ◽  
Vol 16 (5) ◽  
pp. 1107-1124 ◽  
Author(s):  
Neil J. Krystopowicz ◽  
Lindsay M. Schoenbohm ◽  
Jeremy Rimando ◽  
Gilles Brocard ◽  
Bora Rojay
Keyword(s):  
Fault Zone ◽  
Profile Analysis ◽  
Structural Evolution ◽  
Tectonic Geomorphology ◽  
Deformation Pattern ◽  
River Channels ◽  
Block Rotation ◽  
Anatolian Plateau ◽  
Remote Mapping ◽  
Marker Beds

Abstract Situated within the interior of the Central Anatolian Plateau (Turkey), the 200-km-long Tuzgölü extensional fault zone offers first-order constraints on the timing and pattern of regional deformation and uplift. In this study, we analyze the morphometrics of catchments along the Tuzgölü range-front fault and the parallel, basinward Hamzalı fault using a variety of measured morphometric indicators coupled with regional geomorphic observations and longitudinal profile analysis. In addition, we use field and remote mapping to constrain the geometry of two key marker beds, the Pliocene Kızılkaya ignimbrite and Kışladaǧ limestone, in order to investigate deformation in the footwall of the Tuzgölü fault zone. The marker beds form a broad arch along the footwall of the fault, with greatest cumulative displacement along the central part of the fault zone, suggesting early Pliocene extensional reactivation of the Tuzgölü fault with a typical fault-displacement profile. However, a change in deformation pattern is marked by transient knickpoints along river channels; morphometric indicators sensitive to shorter (1−3 Ma) time scales, including river steepness, basin elongation, and mountain front sinuosity, indicate an overall southeastward increase in footwall uplift rate of the Tuzgölü fault zone, which could reflect block rotation or interaction with the Hasan Dag volcano. Basin asymmetry and basin-fault azimuth measurements indicate north-northwest tilting of footwall catchments, which may be linked to regional tilting across the Central Anatolian Plateau interior. Varying patterns of spatial and temporal deformation along the length of the Tuzgölü fault zone are likely due to the interference of crustal- and lithospheric-scale processes, such as rotation of crustal blocks, extrusion of the Anatolian microplate, crustal heating, gravitational collapse associated with plateau uplift, and mantle-driven vertical displacements.

scholarly journals The role of oroclinal bending in the structural evolution of the Central Anatolian Plateau: evidence of a regional changeover from shortening to extension

2011 ◽  
Vol 62 (4) ◽  
pp. 345-359 ◽  
Author(s):  
Erman Özsayin ◽  
Kadir Dirik
Keyword(s):  
Fault Zone ◽  
Structural Evolution ◽  
Shear Zones ◽  
Fault Zones ◽  
Fault System ◽  
Western Boundary ◽  
Southeastern Part ◽  
Anatolian Plateau ◽  
Isparta Angle

The role of oroclinal bending in the structural evolution of the Central Anatolian Plateau: evidence of a regional changeover from shortening to extensionThe NW-SE striking extensional Inönü-Eskişehir Fault System is one of the most important active shear zones in Central Anatolia. This shear zone is comprised of semi-independent fault segments that constitute an integral array of crustal-scale faults that transverse the interior of the Anatolian plateau region. The WNW striking Eskişehir Fault Zone constitutes the western to central part of the system. Toward the southeast, this system splays into three fault zones. The NW striking Ilıca Fault Zone defines the northern branch of this splay. The middle and southern branches are the Yeniceoba and Cihanbeyli Fault Zones, which also constitute the western boundary of the tectonically active extensional Tuzgölü Basin. The Sultanhanı Fault Zone is the southeastern part of the system and also controls the southewestern margin of the Tuzgölü Basin. Structural observations and kinematic analysis of mesoscale faults in the Yeniceoba and Cihanbeyli Fault Zones clearly indicate a two-stage deformation history and kinematic changeover from contraction to extension. N-S compression was responsible for the development of the dextral Yeniceoba Fault Zone. Activity along this structure was superseded by normal faulting driven by NNE-SSW oriented tension that was accompanied by the reactivation of the Yeniceoba Fault Zone and the formation of the Cihanbeyli Fault Zone. The branching of the Inönü-Eskişehir Fault System into three fault zones (aligned with the apex of the Isparta Angle) and the formation of graben and halfgraben in the southeastern part of this system suggest ongoing asymmetric extension in the Anatolian Plateau. This extension is compatible with a clockwise rotation of the area, which may be associated with the eastern sector of the Isparta Angle, an oroclinal structure in the western central part of the plateau. As the initiation of extension in the central to southeastern part of the Inönü-Eskişehir Fault System has similarities with structures associated with the Isparta Angle, there may be a possible relationship between the active deformation and bending of the orocline and adjacent areas.

The Hewett Field, Blocks 48/28a, 48/29a, 48/30a, 52/4a and 52/5a, UK North Sea

2020 ◽  
Vol 52 (1) ◽  
pp. 189-202 ◽  
Author(s):  
J. A. Hook
Keyword(s):  
Fault Zone ◽  
North Sea ◽  
Structural Evolution ◽  
Field Development ◽  
Southern North Sea ◽  
Sandstone Formation ◽  
The Uk ◽  
Basin Margin ◽  
Sour Gas

AbstractThe Hewett Field has been in production for some 50 years. Unusually for a Southern North Sea field in the UK Sector, there has been production from several different reservoirs and almost entirely from intervals younger than the principal Leman Sandstone Formation (LSF) reservoir in the basin. Some of these reservoirs are particular to the Hewett area. This reflects the location of the field at the basin margin bound by the Dowsing Fault Zone, which has influenced structural evolution, deposition and the migration of hydrocarbons. The principal reservoirs are the Permo-Triassic Hewett Sandstone (Lower Bunter), Triassic Bunter Sandstone Formation (BSF) (Upper Bunter) and Permian Zechsteinkalk Formation. There has also been minor production from the Permian Plattendolomit Formation and the LSF. Sour gas is present in the BSF only. Several phases of field development are recognized, ultimately comprising three wellhead platforms with production from 35 wells. Gas is exported onshore to Bacton, where the sour gas was also processed. Peak production was in 1976 and c. 3.5 tcf of gas has been recovered. Hewett has also provided the hub for six satellite fields which have produced a further 0.9 tcf of gas. It is expected that the asset will cease production in 2020.

Structural evolution of a major fault zone: the Cape Ray Fault Zone, southwestern Newfoundland, Canada

1996 ◽  
Vol 33 (2) ◽  
pp. 199-215 ◽  
Author(s):  
Benoît Dubé ◽  
Kathleen Lauzière
Keyword(s):  
Fault Zone ◽  
Large Scale ◽  
Regional Scale ◽  
Point Group ◽  
Structural Evolution ◽  
Strain Partitioning ◽  
Two Phase ◽  
Detailed Structural Analysis ◽  
Grand Bay ◽  
Geodynamic Processes

The Cape Ray Fault Zone is a major Paleozoic structure in southwestern Newfoundland, and occurs at or close to the boundary between two major continental blocks, Laurentia and Avalonia. A detailed structural analysis demonstrates that the fault records early reverse-sinistral thrusting of the Grand Bay Complex at amphibolite grade (D2), followed by a protracted event (D3) characterized by reverse-dextral thrusting of the Grand Bay Complex rocks on top of the supracrustal rocks of the Windsor Point Group and retrogression to greenschist facies, as well as a pre-384 Ma orogen-parallel dextral transcurrent mylonite (D4) during the later stages of the collision. Regional-scale strain partitioning induced heterogeneity of strain both along and across the strike of the Cape Ray Fault Zone. The east–west-oriented segment of the Cape Ray Fault Zone is a tear fault that accommodated differential displacement along the length of the fault. Later stages of the deformation include post-384 Ma sinistral transcurrent reactivation of the dextral mylonite and extension. The reverse-sinistral thrusting and the reverse-dextral motion occurred between 415 and 386 Ma and correspond to the two-phase Acadian orogeny recognized at the scale of the orogen and believed to be related to collision between Laurentia and Avalonia. The Cape Ray Fault Zone preserves evidence of large-scale geodynamic processes affecting rocks where the kinematics and the timing are well constrained.

Structural evolution of the Piqiang Fault Zone, NW Tarim Basin, China

2011 ◽  
Vol 40 (1) ◽  
pp. 394-402 ◽  
Author(s):  
Sebastian A. Turner ◽  
Jian G. Liu ◽  
John W. Cosgrove
Keyword(s):  
Fault Zone ◽  
Tarim Basin ◽  
Structural Evolution

Transfer Zone Characteristics in No. II Fault Zone and its Control on Petroleum, TaZhong Area

2011 ◽  
Vol 356-360 ◽  
pp. 3009-3015
Author(s):  
Yu Hang Zhang ◽  
Xing Yan Li ◽  
Zhi Feng Yan
Keyword(s):  
Fault Zone ◽  
Oil And Gas ◽  
Structural Evolution ◽  
Strike Slip ◽  
Fault Analysis ◽  
Seismic Profiles ◽  
Oil And Gas Exploration ◽  
Detachment Faults ◽  
Tazhong Area ◽  
Transfer Zone

According to interpreted cautiously with 2D and 3D seismic profiles, the typical transfer zone was identified in No.Ⅱ fault zone of TaZhong area, near the TaZhong 46 well of central uplift belt in Tarim basin. Discussed the transfer zone characteristic on the basis of seismic interpretation, it’s clearly triangle transfer zone and caused by strike-slip affection. Using structural analysis method, it is indicated that the transfer zone composed by thrusting-detachment faults. According to structural evolution analysis, the transfer zone had been affecting constantly by transpression during the caledonian-late hercynian, Analyzing geologic setting and regional geology characteristic, TaZhong No.Ⅱ fault zone are sinistral transpression strike-slip fault. Analysis the control action of transfer zone’s for trap, reservoir, hydrocarbon migration and sedimentary, the Transfer zone have the advantage target for oil and gas exploration.

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