Vural Yavuz

Türkish-German University · Civil Engineering

Calculation and classification of the columbite supergroup minerals.

A Microsoft® Visual Basic software, called WinApclas, has been developed to calculate and classify wet chemical and electron-microprobe apatite supergroup mineral analyses based on the New Minerals, Nomenclature and Classification (CNMMN) of the International Mineralogical Association (IMA-10) nomenclature scheme. The program evaluates the 47 appro...

Program (WinSpingc) and Supplementary Materials

Barhal Valley belongs to the Çoruh Valley System in the Kaçkar Mountains of northeastern Anatolia. This 13 km long valley is located to the south of the main weather divide and to the east of Mt. Kaçkar, with the highest peak of the mountain range being 3932 m. Today, source of an average yearly precipitation of 2000 mm of moisture is the Black Sea...

A Microsoft® Visual Basic software, called WinFeldth, has been developed for plagioclase, alkali feldspar and liquid compositions that coexisting as two-feldspar, plagioclase-liquid and alkali feldspar-liquid pairs to calculate the temperature (T, °C) and water contents (H2O wt%) of igneous rocks

A Microsoft® Visual Basic software, called WinFeldth, has been developed for plagioclase, alkali feldspar and liquid compositions that coexisting as two-feldspar, plagioclase-liquid and alkali feldspar-liquid pairs to calculate the temperature (T, °C) and water contents (H2O wt%) of igneous rocks. The program allows the users to enter major oxide o...

Research methods are needed during excavations with TBM (Tunnel Boring Machine) to ensure safe excavation conditions because it is not possible to see and continuously monitor the excavation face completely. One of the most dangerous conditions expected in the tunnels that will be opened underwater is sudden and high water ingress. To detect possib...

Blue ice moraines are common supraglacial landforms in Antarctica and they are considered to record the ice volume fluctuations. In this study, we use photogrammetry and the analysis of multiple cosmogenic nuclides (¹⁰Be, ²⁶Al, and in-situ ¹⁴C) in boulders on three blue ice moraines to explore the timing of ice volume fluctuations in the Sør Rondan...

OZ: Çevre koşullarının kütle hareketlerine olan etkisini anlamaya ve değerlendirmeye yönelik olan bu çalışma, çok seçenekli karar verme aşamalarında mühendislik jeolojisi verilerinin sayısallaştırılmasını amaçlamaktadır. Özellikle açık ocak madenciliğinde, ortamın jeolojik, jeomorfolojik, hidrolojik ve jeomekanik özellikleri, şev tasarımı ve işletm...

Açık ocak maden işletmeciliğinde, yer bilimsel verilerin, mühendislik jeolojisi perspektifinde bilgilendirici yorumlar ile tasarım ve işletmeciliğe desteğinin ne kadar önemli olduğu, büyük ölçekli kütle hareketleri olarak ortaya çıkan, hasar ve kayıplarda daha iyi anlaşılmaktadır. Jeolojik, hidrolojik ve yeraltı su durumu koşullarında değerlendirme...

During the cold periods in Quaternary, equilibrium-line altitude (ELA) decreased which caused valley glaciers to advance. To the contrary, the tongues of glaciers retreated during the warm periods. Quaternary glacier fluctuations were also recorded from Turkish mountains. Recently, the chronology of Late Quaternary advances in the northern and west...

Glacier oscillations, especially during the Late Quaternary, have been widely studied and their timing, amplitude and frequency are reconstructed by detailed field mapping and dating techniques such as surface exposure dating. Recently, the chronology of Late Quaternary advances in the northern and western Turkish mountains was reconstructed by cos...

During the cold periods in Quaternary, equilibrium line altitude decreased and as a result valley glaciers advanced. The vice versa occurred during the warm periods. Quaternary glacier fluctuations had also been recorded in the Turkish mountains. Recently, the chronology of Late Quaternary advances in the northern and western Turkish mountains was...

During cold periods in the Quaternary, global ice volume increased and as a result valley glaciers advanced and the vice versa occurred during the warm periods. Quaternary glacier fluctuations had been also recorded in the Turkish mountains. Recently, the chronology of Late Quaternary advances in the northern and western Turkish mountains was recon...

Uludağ is a prominent mountain in northwestern Turkey where glacial deposits have been documented in the Kovuk Valley and the glacial history has been reconstructed based on 31 cosmogenic ¹⁰ Be exposure ages from glacially transported boulders and bedrock. The results suggest that the Kovuk Glacier began advancing before 26.5±1.6 ka. It reached its...

At the beginning of the Last Glacial Maximum (LGM), equilibrium line altitudes of glaciers started to decrease as a result of changes in atmospheric circulation patterns. This decrease caused increases in the sizes of accumulation areas, thus, also glaciers in Turkey started to advance. The timing of the beginning of the advance depends on the alti...

The evidence of paleoglaciers provides important information of past climate changes. Especially, mountain glaciers are very sensitive indicators of changes of temperature and precipitation. Our aim is to reconstruct a local chronology of paleoglacier oscillations and to produce interrelationship with different terrestrial datasets of paleoenvironm...

Glacier oscillations, especially during the Late Quaternary, have been widely studied and their timing, amplitude and frequency are reconstructed by detailed field mapping and dating techniques such as surface exposure dating. Late Quaternary advances of Turkish glaciers have been exposure-dated in only ten sites in the northern and western Anatoli...

Our study in the Başyayla Valley in northeastern Anatolia showed evidence of four glacier advances that built terminal and lateral moraines. Surface exposure dating of boulders on these moraines showed that the Maximum Ice Extent (MIE) was asynchronous with the global Last Glacial Maximum (LGM; 22.1 ± 4.3 thousand years; ka). The local MIE took pla...

In this study, we present new field and chronological data from 2 antique quarries of marmor troadense (Kestanbol quartz-monzonite) in northwestern Turkey. Marmor troadense has been mined and the building stones have been exported all over the Mediterranean region since approximately 2500 years ago. Analysis of 11 samples from the quarried bedrock...

In this study, we document glacial deposits and reconstruct the glacial history in the Karagöl valley system in the eastern Uludağ in northwestern Turkey based on 42 cosmogenic 10Be exposure ages from boulders and bedrock. Our results suggest the Last Glacial Maximum (LGM) advance prior to 20.4 ± 1.2 ka and at least three re-advances until 18.6 ± 1...

Today's climate of the northern part of the eastern Black Sea Mountains is humid with a mean annual precipitation over 2000 mm. The moisture is directly transported from the Black Sea. Field evidence indicate that this area was glaciated during past. Ice build-up can be therefore explained by a moisture transport system similar to today. Analogous...

Surface exposure ages with cosmogenic 10Be and 26Al on glaciogenic landforms at the Uludağ Mountain, NW Turkey (Mt. Uludağ: 40°04′15″N, 29°13′18″E, 2542 m above sea level), indicate that the local maximum glaciation occurred no later than 20.3 ± 1.5 ka ago. This is in agreement with other exposure age data sets from Anatolia and is in accordance wi...

We have measured 36Cl in three rock surfaces of the Yenicekale building complex in Hattusha (Boğazköy, Turkey). Hattusha was the capital of Hittite Empire which lasted from about 1650/1600 to 1200 BC. At Yenicekale, Hittite masons flattened the summit of an outcropping limestone knoll to form an artificial platform as the foundation for a building....

Situated on the interior side of the western central Taurus Mountains of SW Anatolia, the Muslu Valley in the Dedegöl Mountains (Mt Dipoyraz: 37° 37′ 07″ N, 31° 19′ 42″ E, 2992 m above sea level (a.s.l.)) represents the lower part of a formerly glaciated valley system of ∼7.5 km in length. Surface exposure ages with cosmogenic 10Be and 26Al date a...

Field evidence of palaeoglacial records in the Verçenik valley in the Eastern Black Sea Mountains was examined and 19 samples for surface exposure dating with cosmogenic 10Be were collected with the aim of increasing knowledge on the amplitude and frequency of palaeoglacier advances in Anatolia. Glacial erosional features were mapped and the flow d...

The Kavron and Verçenik Valleys are located in the Eastern Black Sea Mountain range in northeastern Turkey. This study identified several snow-avalanche ridges in these glacial valleys. Those in the Kavron Valley were mapped in detail and the largest and geomorphologically oldest ridge of each valley was sampled for cosmogenic exposure dating with...

Kavron Valley lies in the Kaçkar Mountain range of northeastern Anatolia and is a north–south-oriented, typically U-shaped glacial valley consisting of a main and three tributary valleys. The Quaternary units that outcrop in this valley have been mapped and 22 samples have been processed for surface exposure dating using cosmogenic 10Be. According...

Historically, the first evidence of a frozen Bosphorus was noted during the time of Herodotus. Analysis of the historical data about freezing events in the Bosphorus (at Istanbul) reveals the existence of four main cold periods since 1 AD. The first occurred around the 1st cteunry. Although the temperature was close to, or perhaps a little lower th...

Historically, the first evidence of a frozen Bosphorus was noted during the time of Herodotus. Analysis of the historical data about freezing events in the Bosphorus (at Istanbul) reveals the existence of four main cold periods since 1 AD. The first occurred around the 1st cteunry. Although the temperature was close to, or perhaps a little lower th...

WinClastour is a Microsoft® Visual Basic 6.0 program that enables the user to enter and calculate structural formulae of tourmaline analyses obtained both by the electron-microprobe or wet-chemical analyses. It is developed to predict cation site-allocations at the different structural positions, as well as to estimate mole percent of the end-membe...