Alper GürbüzNigde Omer Halisdemir University · Department of Geological Engineering
Alper Gürbüz
PhD
About
45
Publications
22,052
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611
Citations
Citations since 2017
Introduction
Additional affiliations
August 2018 - present
Nigde Omer Halisdemir University
Position
- Professor (Associate)
October 2014 - October 2015
September 2012 - August 2018
Nigde Ömer Halisdemir University
Position
- Professor (Assistant)
Education
September 2005 - July 2012
September 2001 - July 2005
Publications
Publications (45)
Coastal spits are low-lying landforms at the depositional shores and seem to be relatively young and vulnerable formations formed under the control of both terrestrial and marine environments. These features reflect the sedimentary and hydrodynamic characteristics of the relevant shores. They can develop in critical environmental conditions dependi...
Central-west Turkey is a transition zone both tectonically and climatically between the quite different central and western regions of Anatolia. Central Anatolia represents the seismically quiet part of the otherwise highly active Turkey. On the other hand, this region has some of the lowest precipitation and highest evaporation ratios of Turkey. C...
Holocene climate changes of the NW Anatolia is well-resolved by means of high resolution speleothem (Sofular Cave) and sedimentary (İznik, Çubuk Lakes and Black Sea) records. The Sakarya River, the major fluvial system of the region, comprise 3 stepped depositional terrace staircases located just to the south of the North Anatolian Fault at the Ada...
The Cappadocia region located in the centre of Anatolia is mainly known because of its Neogene and Quaternary volcanism and related geomorphology showing spectacular erosional landscapes. However, in contrast to its relatively well-studied volcanic and geomorphic history, studies on its sedimentary deposits together with its environmental and clima...
History of mining in Anatolia goes back to the pre-pottery Neolithic in parallel to history of ancient civilizations in the region. Based on archaeological findings, native copper was the first metal used by humans, and right after, it was mined in central Anatolia. The mining of copper seemed to cause both the birth of metallurgy and powerful civi...
Abstract
The study presents the late Quaternary evolution of the southern Marmara region in the northwestern Turkey and discusses the suitability of the area for settlements. It is based on interpretation of sediment analyses together with radiometric dates obtained from the drilling cores. As three fourth of the southern Marmara region (ca 30 000...
The Büyük Menderes River is the longest river that discharges into the Aegean Sea, with a length of 615 km. It is one of the main rivers dominating in the geomorphology of western Turkey, with its drainage basin that reaches to 24,000 km². The river is also very important because of its meandering channel patterns. The term ‘meandering’ in geomorph...
Tuz Gölü (Salt Lake) is a large salt lake located in the heart of Anatolia. Long-term morphological development of the lake is controlled by the Tuz Gölü Fault Zone and the İnönü-Eskişehir Fault System. The Central Black Sea Mountains in the north and the Taurus Mountain Belt in the south are major climatic barriers generating a precipitation shado...
The Turkish–Iranian Plateau has an active tectonic deformation pattern including various tectonic structures (i.e., faults, thrusts, fissures) in various orientations. Regarding the origin of deformation in the plateau region, a roughly north–south directed shortening resulting from collision between the Arabian and Eurasian plates and their follow...
As part of the Alpine–Himalayan orogenic system, the Zagros Orogen represents a mountainous region along ∼1500 km with an extensive active crustal deformation and intense seismic activity in a northwest–southeast direction. The orogen is divided into various tectonic zones longitudinally according to their structural patterns and stratigraphic succ...
Ondokuzuncu yüzyılın ortalarına doğru yerbilimciler arasında, özellikle Kuzey Avrasya ve Kuzey Amerika’da oldukça geniş alanlar kaplayan ve çoğunlukla pekişmemiş halde gözlenen kırıntılı çökeller başlıca tartışma konusuna dönüşmüştür. ‘Kuvaterner’ teriminin bir zaman dilimi olarak ortaya atılması her ne kadar bu dönemlere rastlasa da, bu zaman dili...
The İvriz detachment fault has been determined on the southern border of the Ulukışla basin separating the metamorphic Bolkar Group of the Taurus Mountains and the Paleocene-Lower Eocene Halkapınar formation of basin deposits. The fault dips towards the north and has kinematic indicators (asymmetric grain/grain aggregate porphyroclasts, oblique fol...
Turkey is geographically positioned as a bridge between the continents of Asia, Europe and Africa. Th e country has very rich and complex geology and geomorphology characterized by the presence of various rock exposures, landscapes, active and inactive volcanic centers, mountain belts, active fault zones, etc. However, geoscience education in a cou...
Synonyms
Dilatational fault jog; Extensional duplex; Releasing bend; Rhomb graben; Rhombochasm; Stepover basin; Tensile bridge; Wrench graben
Definition
Pull-apart basins are structural depressions that localized on the geometric irregularities along strike-slip faults where the master fault overstepping or bending.
Introduction
Strike-slip fault...
Synonyms
Antidilational fault jog; Compressional bridge; Compressional stepover; Contractional duplex; Pop-ups; Pressure ridge; Push-up swell; Restraining bend; Restraining stepover; Rhomb horst; Structural knot; Transpressional uplift
Definition
Push-up blocks are topographic uplifts that localize on the geometric irregularities along strike-slip...
This paper proposes an alternative route for the southern branch of the North Anatolian Fault Zone (NAFZ) using evidence from morphotectonic features, seismology, GPS and recently published Magnetotelluric and Transient Electromagnetic (MT) data. In this new route, the southern branch connects with the main branch of the NAFZ in Bolu via the Gölpaz...
Lake Neor is the largest lacustrine basin in the high mountains of the Middle East, at 2500 m altitude in the Alborz belt. This lake of Holocene age is a shallow, fresh water body of glacial origin with ca 4 km2 surface area and a 40 km2 drainage area. Its sedimentary sequence comprised of peat and gyttja consists of >10 m infill, which is fairly t...
Owing to their continuous sedimentation, lacustrine environments
are usually excellent archives of palaeo-environmental
changes (Stockhecke et al., 2014; Sharifi et al., 2015). Even environmental
changes at an annual scale may be detected in lake sediments
and therefore offer an opportunity to study past changes
at high resolution, e.g. when the se...
This study aims to understand the various effects of known tectonism on a fluvial network and to interpret the tectonic deformations using described, and analysed systematic anomalies in the drainage basin of the Yeşilirmak River in northern Turkey at countermarch. This region, which is divided into several faulted wedges by right-lateral strike-sl...
Central Turkey represents the only orogenic plateau in the Mediterranean region. Also, the largest closed drainage basin and the largest intracontinental basin of Turkey, the Lake Tuz Basin, is located in this region. Results from a three-dimensional (3-D) computer modeling study of the Lake Tuz Basin indicate a southward-deepening freshwater lake...
Although there are several studies discussing the pre-Neogene development of the LakeTuz basin, which is the largest terrestrial basin in Turkey, investigations delineating thecharacteristics of the Neogene and particularly Quaternary period of this basin are quitelimited. Whereas studies regarding such periods of the basin are quite informative fo...
Although there are several studies discussing the pre-Neogene development of the Lake
Tuz basin, which is the largest terrestrial basin in Turkey, investigations delineating the
characteristics of the Neogene and particularly Quaternary period of this basin are quite
limited. Whereas studies regarding such periods of the basin are quite informative...
Water and sediment load of modern Lake Beyşehir derived mostly from the inland of Taurus
Mountains have been transported to Lake Suğla and Çumra plain of Konya and finally to
Tuz Gölü. This drainage pattern clearly indicates that Lake Beyşehir is a telescopic part
of central Anatolian closed basin at the Taurus Mountains. Subsequently, the geologic...
The Lake Beyşehir basin is represented by an area of 4200 km2 in central-west Anatolia
region. The region, where the basin situated, is considered geographically as western Taurus.
On the other hand, this region was correspond to an area where nap emplacements occurred
within the Taurid orogenic belt in the paleotectonic period. In the neotectonic...
Lake Beyşehir, which is Turkey’s third largest lake, is an important area to observe the
effects of climatic changes on water lands due to its depthand wide spread area.The lake
is surrounded by Taurus Mountains to the south and west, Erenler Mount to theeast, and to
the west by the Sultan Mountains. Interms of drain age basin, this basin is separa...
Catastrophic losses requires the development of specific national strategies and applications. These may include liquefaction which is the main causes of great loss of life and property damage during the major earthquakes. A national research program on liquefaction susceptibility for earthquake hazard assessment is not available. To amend this sho...
Southwestern Turkey experienced a transition from crustal shortening to extension during Late Cenozoic, and evidence of this was recorded in four distinct basin types in the Muğla–Gökova Gulf region. During the Oligocene–Early Miocene, the upper slices of the southerly moving Lycian Nappes turned into north-dipping normal faults due to the accelera...
Western Turkey is characterized mainly by E-W, NW-SE, and NE-SW-trending grabens. The reverse V-shaped geometry of the Baklan-Dinar graben is formed by coupling of the NE-SW-trending Baklan and the NW-SE-trending Dinar grabens, and is critical to an understanding of the structural evolution of the Aegean region. Its geometry indicates biaxial exten...
Pull-apart basins are depressions bounded on their sides by two or more strike-slip faults and on their ends by diagonal transfer
faults. As proposed by theoretical, experimental, and numerical studies in the literature, there are angular and scale relationships
between these faults. Here, I compiled the major results on geometries of pull-apart ba...
The existence of an alternative strait between the Black and Marmara Seas, east of today's İstanbul Strait, on the route of İzmit Gulf–Lake Sapanca–Lower Sakarya Valley, was already claimed at the end of the 19th century and has also been considered in several recent studies. Firstly, in historical documents over the last 2500 years, some natural a...
High-resolution palynological analysis of a 38-cm-long core collected from Lake Sapanca, northwest Turkey, reveals large earthquakes that occurred during the second half of the 20th century along the North Anatolian Fault Zone. Four events have disturbed the lacustrine sedimentary sequence. Three of the four events are historical earthquakes in 199...
The Büyük Menderes Graben is a seismically active depositional basin in the N–S extensional tectonic region of western Anatolia, Turkey. It extends in an E–W direction and is bounded by the Aegean Sea to the west. The infill of this tectonic basin comprises ca 850 m and 245 m thick clastic sequences of Neogene and Quaternary, respectively and the Q...
Due to northward subduction of Neotethys, the İstanbul zone collided with the Sakarya zone in northwest Turkey during the early Eocene. Subsequently, this region was subjected to compressional forces during the late Eocene–early Miocene period. Folds, thrusts and reverse faults developed approximately parallel to long axes of the İstanbul zone. NNW...
Numerous basins that present in northern Turkey formed in Plio-Quaternary period by the strike-slip tectonics of the North Anatolian Fault Zone. These pull-apart basins isolated from their surrounding topographies by major scarps of faults along their margins that mapped as active faults. But the mapped recent traces in the pull-apart basins are in...
Lake Sapanca in NW Turkey is a fault originated freshwater basin fed by seasonally variable flows of 15 streams. Considerations
of lake–river interaction, supported by statistical measures of 47 bottom samples, suggest that sediment transport and deposition
within the lake is controlled by two types of human constructed structures in addition to na...
In this study the spatial variations of the Plio-Quaternary tectonic activity and deformation of different fault segments
of the North Anatolian Fault Zone (NAFZ) in the eastern Marmara region around Lake Sapanca, are assessed using geomorphic,
morphometric and bathymetric approaches. Lake Sapanca is an E-W-trending structure located in the İzmit-S...
The study area is located approximately 16 km SE of Sulucaova village in Çamardi (Niǧde), to the west the Eastern Taurides and is observed within the Siyah Aladaǧ nappe. The investigated area is bounded by the sinistral Ecemiş fault to the west, the ophiolitic melange of the Beyaz Aladaǧ nappe to the south and the Siyah Aladaǧ nappe to the east and...
In this study, by the using of geomorphic approach, the spatial variation of deformation of the North Anatolian Fault Zone (NAFZ) on the geomorphology of Izmit - Sapanca Corridor and surrounding area is assessed. Results provide evidence for relative variations in tectonic activity and suggest a relatively high degree of activity along the southern...
Projects
Projects (4)
The last 10000 years witnessed demise of civilizations as a result of the combination of multi-factors. Climate is an important factor to rise or demise of that civilizations. Turkey has a long cultural history and there are many caves containing speleothems. In this project, we aim to produce highly resolved and precisely dated paleoclimate records from Tabak Cave in SW Turkey.
Holocene climate changes of the NW Anatolia is well-resolved by means of high resolution speleothem (Sofular Cave) and sedimentary (İznik, Çubuk Lakes and Black Sea) records. The Sakarya River, the major fluvial system of the region, comprise 3 stepped depositional terrace staircases located just to the south of the North Anatolian Fault at the Adapazarı Basin. These terraces provide sedimentary record from 9-1.8 ka (T2), 1.2-1 ka (T1) and 0.7 ka-recent (T0) evidenced by luminescence and radiocarbon dating and formed in response to climate and sea level changes and also react to continuous tectonic uplift.
The sections are fully exposed due to excessive sand-mining, and formed of fine grained flood plain deposits exhibiting a layered stratigraphy. Despite the hiatus(s), these deposits have the potential to record and reflect the hydrological changes at the Sakarya River throughout the Holocene.
In order to construct an event stratigraphy, we detail the sections exposed at the terrace steps and map the changes in grain size, geochemistry, magnetic properties and charcoal percent etc. These sections also comprise tree trunks to be analyzed by means of dendrochronology, and also fossil molluscs and pollens.
By using this multi-proxy approach, we aim to detect the climate changes and in detail RCC's (such as 8.2 and 4.2 ka events) evidenced in regional paleoclimatic records and also the critical hydrological events (such as frequent flooding periods) for the region.
The Pleistocene geomorphological evolution of the Northwestern Anatolian Plate, which is drained by the Sakarya River, is controlled by climate and base level changes during the glacial/interglacial periods and also with the recent tectonic activity of the North Anatolian Fault (NAF).
Sakarya, which is the major river system of the study area flows through the Black Sea to the North, consist of many well developed tributaries Göksu, Karasu, Göynük, Nallı, Aladağ, Mudurnu, Kirmir ve Ova rivers. Along its 824 km long main channel, Sakarya follows E-W elongated mountain ranges, narrow basins (Pamukova and Adapazarı) formed along the NAF and also the narrow gorges connecting these morphological structures, indicating a complex morphological evolution. The clues of the Pleistocene evolution of this river are the river terrace staircases located at the edges of the gorges and basins. The study of these terraces by means of detailed mapping, high resolution measuring and luminescence dating is the methodology of this project.
The idea of this research proposal is based on the preliminary results of an ongoing TUBITAK research program (115Y132). This study, using the principles described above, reveals 0.65 ±0.5 mm/year uplift/incision rate from the terraces located close to the North Anatolian Fault and within Geyve-Boğazköy-Arifiye terrace staircases. Another terrace system of 5 steps upto +80 meters, located ~15-30 km south to the southern branch (Geyve-Mekece segment) of the NAF, namely Osmaneli-Selimiye reveals a very close uplift rate.
This project proposes to use the terrace staircases as paleo-geodetical reference points and to increase the quantity of data distributed as dense as possible to the east and south to the NAF to reveal the distribution of vertical deformation. Thus it can be possible to identify the differential deformation within the Northwest of the Anatolian Plate and explain the variations in a tectonic model.
