The abundance of the NE-SW direction veins mineralized in barite, copper, lead and zinc in the
Tadaout-Tizi n’Rsas (TTR) anticline make this area one of the principal vein fields in Tafilalet
(easternmost border of the Eastern Anti-Atlas). Reactivation of faults and alternation of competent
(thicks Ordovician series, Silurian limestone and Devonian limestone) and incompetent levels
(Silurian shales and Devonian marls) have an important role in the deformation of the TTR anticline
during the NE-SW Variscan shortening. Our work based on lineaments extraction using a Landsat 8
OLI combined with some geological cross sections, shows a N130° major fold corresponding to TTR
anticline. This big fold shows internal N130°, N95° and N20° minor folds. This structure indicates
that the TTR area was formed in the hinge between the Anti-Atlas and the Ougarta belts. A number
of these folds are the consequence of the underlying Precambrian faults reactivation and alternation
of competent and incompetent levels. Brittle tectonics is dominated by NE-SW normal faults which
result from the NE-SW shortening consequence of the Gondwana and Eurasia continents collision.
Consequently, the mineralization of TTR is necessarily related to late or post-Variscan orogeny
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In this paper, two modeling method are employed. First, a method based on the Marquardt’s
algorithm is presented to invert the gravity anomaly due to a finite vertical cylinder source. The
inversion outputs are the depth to top and bottom, and radius parameters. Second, Forced Neural
Networks (FNN) for interpreting the gravity field as try to fit the computed gravity in accordance
with the estimated subsurface density distribution to the observed gravity. To evaluate the ability of
the methods, those are employed for analyzing the gravity anomalies from assumed models with
different initial parameters as the satisfactory results were achieved. We have also applied these
approaches for inverse modeling the gravity anomaly due to a Chromite deposit mass, situated east
of Sabzevar, Iran. The interpretation of the real gravity data using both methods yielded almost the
same results.
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Foam concretes can be produced with aggregate or without aggregate. In this study, the possibility of
using PC ash as lightweight aggregate in the production of foam concrete was investigated. WastePC ash is emerging from the pulverized coal furnace about 10 tons/day in a textile factory located in
the vicinity of Dinar (Afyonkarahisar). The chemical properties, particle size distribution and grain
densities of PC-ash were determined. Foam concrete with a dry density of 450 kg/m3
at a cement
dosage of 250 kg/m3
and w/c:0.65 was produced after the aggregate analysis. The PC-ash which is
used in foam concrete mix is between 0 and 200 kg/m3
. 100 mm cube and 300x300x50 mm prism
samples were prepared with this foam concrete. The compressive strengths of the cube samples and
the thermal conductivity coefficient of the prism samples were tested at the 28th day. The average
compressive strength of foam concrete samples with a density of 452 kg/m3
was determined as 1.07
MPa and the thermal conductivity coefficient was determined as 0.097 W/mK. As a result, it has
been determined that PC-ash as lightweight aggregate can be successfully used in production of
precast element and light floor-screed
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The effects of geological events that occurred in ancient times, on ancient cities are undeniably great,
so geoarchaeology has become an important mutidisciplinary science. Using geological methods in
archaeological researchs offers a much more comprehensive understanding for history. Today, the
methods of remote sensing and geographical information systems have facilitated archaeological
researches to a greater extent than before. In this study, Phaselis, Andriake and Patara ancient
cities were investigated. In the research, help was obtained from satellite images as a method. By
comparing the ancient coast line and the modern coast line, it is tried to be understood to what extent
the sea level change occurred.
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The East Anatolian Fault (EAF) is an active left-lateral strike-slip fault extending between Karlıova
(Bingöl) in the northeast and Iskenderun Bay in the southwest. The Palu, which is the subject of the
study area, is located on the Palu segment of the EAF. The Palu segment starts from the northeast of
Palu, and is approximately 77 km long, and reaches the Lake Hazar after passing the Baltaşı Plain.
Maximum shaking intensity in the earthquake listed in historical catalogs is estimated to have been
Mercalli Intensity VIII, with conflicting accounts of as few as 8.000-10.000 to as many as 50.000
people killed. An examination of contemporary documents, books and administrative archives in
the State Archives Head of Presidency Republic of Turkey for the district reveal that the extent
of damage and the number of fatalities in the earthquake have been considerably inflated by these
historical catalogs.
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Ground improvement using mechanical stabilization is commonly applied by performing the
standard Proctor compaction test, which requires a significant quantity of soil, usually obtained
from open pits. A static compaction test is an alternative laboratory compaction test. Although
researchers have shown that the results of miniature size static compaction tests are comparable
with that of standard Proctor tests in terms of the maximum dry density and the optimum water
content, no attempt has been made to compare the two fundamental properties of the compacted
soil: undrained shear strength and hydraulic conductivity. The scope of this investigation was to
estimate the level of static compaction energy required to (1) obtain a compaction curve similar
to that of the standard Proctor test; (2) reconstruct compacted soils using the standard Proctor and
static compaction tests at the optimum water content; and (3) compare the undrained shear strength
and hydraulic conductivity of compacted soils. The compacted soils at the predetermined energy
level were subjected to hydraulic conductivity tests using the rigid-wall falling-head permeability
method. Undrained shear strength tests were performed by employing a high-capacity laboratory
vane shear apparatus on compacted samples of both the standard Proctor and static compaction
tests. The present investigation revealed that the static compaction test, requiring about only 10% of
the soil necessary to perform the standard Proctor method, provides comparable results in regard to
hydraulic conductivity and undrained shear strength.
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Collapse of the roof during mining is a constant threat to the lives of miners and equipment
performance. To predict it, different numerical and physical approaches are used. Physical modeling
of the massif region from -951 m to -841 m using equivalent materials were undertaken in this
investigation. Various options for mining the Vorkuta coal deposit were considered: mining only
the upper industrial seam, mining the lower coal seam as a protective layer to the upper one, and
assessing the impact on the collapse zone of the complex structure of the upper coal seam roof
while maintaining an upward order of mining. The main results were as follows: calculated collapse
zone is approximately 30% larger than theoretical; collapse zone decreased when using mining
with lower protective coal seam; the largest collapse zone was observed when pinching the rocks in
upward mining order. Therefore, the research has shown the need to adjust the project for a larger
methane yield. Further large-scale modeling is needed for understanding the characteristics of the
collapse zone.
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Although the Çankırı-Çorum Basin was studied for various purposes such as geological,
stratigraphical, tectonic, coal and oil exploration, studies on fossils are limited. Especially there
have not been detailed studies on molluscs and larger foraminifera. The research area is located at
the vicinity of Ayvalıca (north of Çankırı-Çorum basin). The Middle Eocene Kocaçay formation,
which outcrops in the Çankırı-Çorum Basin, is widespread around Bayat Çorum in the north of the
basin, Sulakyurt Kırıkkale in the west, Çiçekdağı Kırşehir in the south and Sungurlu Çorum in the
middle of the basin. The formation is composed of conglomerate, carbonated sandstone, limestone
and sandy marls and also includes rich larger foraminifera and molluscs. This study mainly focuses
on taxonomy and environmental interpretations of Ostrea roncaensis (Partsch in coll. Bayan, 1870)
de Gregorio, 1884, Velates perversus (Gmelin, 1791) species from Mollusca and Nummulites
beaumonti d’Archiac and Haime, 1853, N. aturicus Joly and Leymerie,1848, N. perforatus (de
Montfort, 1808) and Assilina exponens (Sowerby, 1840) species from larger Foraminifera. In
addition, considering faunal features from bottom to top Ostrea roncaensis, Velates perversus,
Nummulites aturicus and Assilina exponens Abundance Biozones were identified. The age range
of the Kocaçay Formation is determined as Lutetian-Bartonian. Lithological and faunal contents
indicate that sediments of the Kocaçay formation were deposited within lagoon to nummulitic sets
in a shallow marine environment
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Şule GÜRBOĞA, Aslı Zeynep YAVUZOĞLU, Recep GÜNEY, Fatma Betül KARCI, Ayhan YAVUZOĞLU, Özgür TÜRKMEN, Pir Çağatay KARTAL, Bahri Serkan AYDEMİR, Murat EVREN, Barbaros ŞİMŞEK,
Murat CENK , Eyyüp ÖZBEK, Tuğrul Şükrü YURTSEVER, Füsun YİĞİT FETHİ, Eşref AYLAN, Uğur Zeki KIRAT
Şule GÜRBOĞA, Aslı Zeynep YAVUZOĞLU, Recep GÜNEY, Fatma Betül KARCI, Ayhan YAVUZOĞLU, Özgür TÜRKMEN,
... Devamını oku
Within the scope of this paper, seismic reflection and bathymetry studies were carried out in the
shallow marine area forming the westernmost part of the Tekirdağ Basin using the R/V Selen
Research Vessel within the MTA Marine Research Department. In the study area, ~ 500 km length
bathymetry data and ~191 km shallow seismic profiles ( 41 lines) were collected. By means of the
data, tectonic structures and deformation textures of the North Anatolian Fault System (NAFS) in
the marine area of Gaziköy were examined. As a result of the processing and interpretation of the
seismic sections, compression structures occurring due to the SW rotation of the NAFS in the study
area, the morphology of the Ganos depression that formed as a result of faulting and also three
different stratigraphic units were distinguished. These units are separated from each other by distinct
unconformity surfaces and each unit presents different deformation structures. One of the most
significant results obtained from the seismic data is that the unconformity surface that separates the
current sediments of the seafloor from the older units is represented by the overlapping structures
indicate sea level changes. It has been assessed that this situation occurred as a result of the erosional
process developed during sea level fall.
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Ceyhan Ertan TOKER
Ceyhan Ertan TOKER
Gravity data is processed and the problems of the earth are examined. The density of the data can be
arranged to solve detail, semi-detail and regional problems. Here, the gravitational data obtained by
processing the linearity of the 2D and 3D visuals in terms of plate size large wavelength structures
are examined. 2D linearities determine important stress areas but they are affected at different rates
with respect to the spatial distribution of source effect. Due to grid formation, these boundaries
are affected at different rates from less dense and very dense structures. Different wavelengths
in structure boundary analysis; derivative and phase elements and filters. Vertical change in 3D
analysis can be made at the approach level with the analytical examination of 2D change. At this
stage, the distribution of source effect and depth model structure parameters are calculated. When
examining large wavelength structures, some of the buried structures appear due to cover removal.
In search of solutions for tectonic structures that we may miss; The tectonic components that need to
be confirmed in the Eastern Mediterranean have been tried to be elucidated in this study. 3D building
solutions are important in this respect.
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