scholarly journals Paleomagnetic constraints on the timing and distribution of Cenozoic rotations in Central and Eastern Anatolia

2017 ◽  
Author(s):  
Derya Gürer ◽  
Douwe J. J. van Hinsbergen ◽  
Murat Özkaptan ◽  
Iverna Creton ◽  
Mathijs R. Koymans ◽  
...  
Keyword(s):  
Vertical Axis ◽  
Western Boundary ◽  
Eastern Anatolia ◽  
The North ◽  
Kinematic Evolution ◽  
South Central ◽  
Sivas Basin ◽  
Thrust Zone ◽  
Axis Rotation ◽  
Central Turkey

Abstract. To quantitatively reconstruct the kinematic evolution of Central and Eastern Anatolia within the framework of Neotethyan subduction accommodating Africa-Eurasia convergence, we paleomagnetically assess timing and amount of vertical axis rotations across the Ulukışla and Sivas regions. We show paleomagnetic results from ~ 30 localities identifying a coherent rotation of a block – comprising the southern Kırşehir Block, the Ulukışla basin, the Central and Eastern Taurides, and the southern part of the Sivas basin. This block experienced a ~ 30° counter-clockwise vertical axis rotation since Oligocene time. Sediments in the northern Sivas region show clockwise rotations. We use the rotation patterns together with known fault zones to argue that the counter-clockwise rotating domain of south-central Turkey was bounded by the Savcılı Thrust Zone and Deliler-Tecer Fault Zone in the north and by the African-Arabian trench in the south, the western boundary of which is poorly constrained and requires future study. Our new paleomagnetic constraints provide a key ingredient for future kinematic restorations of the Anatolian tectonic collage.

scholarly journals Paleomagnetic constraints on the timing and distribution of Cenozoic rotations in Central and Eastern Anatolia

Solid Earth ◽  
2018 ◽  
Vol 9 (2) ◽  
pp. 295-322 ◽  
Author(s):  
Derya Gürer ◽  
Douwe J. J. van Hinsbergen ◽  
Murat Özkaptan ◽  
Iverna Creton ◽  
Mathijs R. Koymans ◽  
...  
Keyword(s):  
Vertical Axis ◽  
Central Anatolia ◽  
Western Boundary ◽  
Eastern Anatolia ◽  
Polar Wander ◽  
The North ◽  
Apparent Polar Wander Path ◽  
Kinematic Evolution ◽  
South Central ◽  
Thrust Zone

Abstract. To quantitatively reconstruct the kinematic evolution of Central and Eastern Anatolia within the framework of Neotethyan subduction accommodating Africa–Eurasia convergence, we paleomagnetically assess the timing and amount of vertical axis rotations across the Ulukışla and Sivas regions. We show paleomagnetic results from ∼ 30 localities identifying a coherent rotation of a SE Anatolian rotating block comprised of the southern Kırşehir Block, the Ulukışla Basin, the Central and Eastern Taurides, and the southern part of the Sivas Basin. Using our new and published results, we compute an apparent polar wander path (APWP) for this block since the Late Cretaceous, showing that it experienced a ∼ 30–35° counterclockwise vertical axis rotation since the Oligocene time relative to Eurasia. Sediments in the northern Sivas region show clockwise rotations. We use the rotation patterns together with known fault zones to argue that the counterclockwise-rotating domain of south-central Anatolia was bounded by the Savcılı Thrust Zone and Deliler–Tecer Fault Zone in the north and by the African–Arabian trench in the south, the western boundary of which is poorly constrained and requires future study. Our new paleomagnetic constraints provide a key ingredient for future kinematic restorations of the Anatolian tectonic collage.

Lystra

2003 ◽  
Author(s):  
Clyde E. Fant ◽  
Mitchell G. Reddish
Keyword(s):  
Hard Core ◽  
Asia Minor ◽  
The North ◽  
Stone Block ◽  
South Central ◽  
Ancient City ◽  
Ancient Site ◽  
Roman Province ◽  
Central Turkey ◽  
The City

Few visitors seek out the ancient site of Lystra. Neither its unexciting location in the Anatolian plain nor its unexcavated mound offer much enticement except to the hard-core adventurer seeking to trace the route of the Apostle Paul. The ancient city of Lystra was located near the modern village of Hatunsaray, approximately 24 miles southwest of Konya in south-central Turkey. In 1885, about a mile north of Hatunsaray, on a mound called Zoldera (or, variously, Zordula), J. R. Sitlington Sterrett discovered a stone block approximately 3.5 feet tall and 1 foot thick. On the stone was the Latin inscription “DIVVM AVG COL IVL FELIX GEMINA LVSTRA CONSECRAVIT D D,” which uses the Latinized version “Lustra” for the name of the city. The discovery of this monument, erected to honor Caesar Augustus, who founded the Roman colony of Lystra, made identification of the site of ancient Lystra possible. Lystra was a part of the Lycaonian region of Asia Minor, an area bordering Phrygia on the west, Cappadocia on the east, and the ethnic Galatian region on the north. To the south were the Taurus Mountains. Earlier made a part of the province of Cilicia, Lycaonia was put under the control of Amyntas, an ally and client king of the Romans, in 36 B.C.E. When Amyntas died in 25 B.C.E., Lycaonia became a part of the Roman province of Galatia. Because the site of Lystra has yet to be excavated, little can be said with certainty about the earliest settlements on the site. The evidence of Hellenistic-style pottery and Greek inscriptions from the Roman period would suggest that at least a small village existed here during the Hellenistic period. Of the coins that have been found that originated from Lystra, none predates the time of the Roman colony, perhaps indicating that any pre-Roman settlement was not significant enough to issue coins. Emperor Augustus established Lystra as a Roman colony, likely in 25 B.C.E. at the same time that several other Roman colonies, including Pisidian Antioch, were founded. While all the colonies were established to help secure Roman control over Asia Minor, Lystra was likely founded specifically to suppress the Homanadenses and other mountain tribes in south-central Asia Minor who were hindering Roman control of the area.

Slow post-orogenic cooling in a deeply eroded orogen: Reindeer Zone, Trans-Hudson Orogen, Saskatchewan

2004 ◽  
Vol 41 (7) ◽  
pp. 867-880 ◽  
Author(s):  
Joyia Chakungal ◽  
Peter H Reynolds ◽  
Rebecca A Jamieson ◽  
David Corrigan
Keyword(s):  
Shear Zone ◽  
Structural Break ◽  
Thermal Relaxation ◽  
The North ◽  
South Central ◽  
Lake Zone ◽  
Thrust Zone ◽  
Peak Metamorphism ◽  
High Grade Metamorphism ◽  
Lower Crustal

We present 40Ar/39Ar hornblende and muscovite data from a 200 km transect across the northern flank of the Paleoproterozoic Trans-Hudson Orogen (THO) exposed along Reindeer Lake in Saskatchewan, Canada. The transect crosses a series of distinct lithotectonic domains that experienced pressure–temperature (P–T) conditions of 600–730 °C at 4.5–6.0 kbar (1 kbar = 100 MPa) during D2 peak metamorphism at 1820–1790 Ma. The distribution of 40Ar/39Ar hornblende ages shows that most of the transect cooled through approximately 500 °C by ca. 1765 Ma, with two significant exceptions. At the north end of the transect, older ages in the Peter Lake Domain (up to 2200 Ma) suggest that this region did not experience high-grade metamorphism that affected the rest of the transect and may indicate a structural break between these Archean rocks and the Cree Lake Zone to the north. In the south-central part of the transect, U–Pb (monazite, titanite) and 40Ar/39Ar (hornblende, muscovite) ages indicate that rocks in the vicinity of the Duck Lake Shear Zone, a ductile thrust zone separating the Kisseynew and La Ronge domains, cooled at a rate of 6 °C/Ma and that cooling was delayed by ca. 20–25 million years relative to that of adjacent regions. Based on generic thermal–tectonic models for large hot orogens, we suggest that delayed cooling in the vicinity of the shear zone reflects post-orogenic thermal relaxation of lower crustal isotherms that were perturbed by the effects of convergence.

Paleomagnetism of the late Paleozoic Slide Mountain terrane, northern and central British Columbia

1993 ◽  
Vol 30 (9) ◽  
pp. 1898-1913 ◽  
Author(s):  
David R. Richards ◽  
Robert F. Butler ◽  
Tekla A. Harms
Keyword(s):  
British Columbia ◽  
Vertical Axis ◽  
Natural Remanent Magnetization ◽  
Tilt Test ◽  
Lower Permian ◽  
Polar Wander ◽  
The North ◽  
Apparent Polar Wander Path ◽  
Reversed Polarity ◽  
Axis Rotation

Paleomagnetic samples were collected from Mid-Pennsylvanian to Lower Permian red argillaceous cherts at two localities of the Slide Mountain terrane: 18 sites from the Sylvester allochthon in northern British Columbia and 11 sites from Sliding Mountain in central British Columbia. A secondary component of natural remanent magnetization in the Sylvester samples yields a paleomagnetic pole that can be brought into coincidence with the Jurassic portion of the North American apparent polar wander path by inferring vertical-axis rotation during obduction of the allochthon. Both localities yield a characteristic component (ChRM) with unblocking temperatures from 650 to 680 °C. After structural correction for bedding tilt, all inclinations of ChRM are negative, consistent with magnetization during a reversed-polarity interval in the northern hemisphere. Site-mean ChRM directions show consistent inclinations but distinct stratigraphic groupings of declinations. Inclination-only statistics indicate that the ChRM passes a tilt test within the Sylvester allochthon and regionally between the two localities. The ChRM was apparently acquired prior to structural imbrication within the Sylvester section and regional differential tilting. We interpret the ChRM to be a primary magnetization acquired at or soon after deposition during the Permo-Carboniferous reversed-polarity superchron. The mean ChRM inclination of −16.7° ± 6.0° from the Sylvester allochthon indicates a paleo-latitude of 8.8° ± 3.4°N, which is corroborated by a paleolatitude of 1.9° ± 1.5°N from the Sliding Mountain locality. When compared with expected Pennsylvanian–Permian paleolatitudes, a net poleward translation of 20.3 ± 3.7° is implied for at least the sampled lithotectonic component of the Sylvester allochthon.

scholarly journals Timing and magnitude of vertical-axis rotations in the eastwards-flanking synorogenic sediments of the South-Pyrenean fold-and-thrust belt. Kinematics and origin of the salient curvature.

2020 ◽  
Author(s):  
Charlotte Peigney ◽  
Elisabet Beamud ◽  
Óscar Gratacós ◽  
Luis Valero ◽  
Ruth Soto ◽  
...  
Keyword(s):  
Foreland Basin ◽  
Structural Data ◽  
Vertical Axis ◽  
Central Unit ◽  
Thrust Belt ◽  
The South ◽  
The North ◽  
South Central ◽  
Fold And Thrust Belt ◽  
Thrust Sheets

<p>The South-Pyrenean fold-and-thrust belt consists of three major thin-skinned thrust sheets (Bóixols, Montsec and Serres Marginals) made up of uppermost Triassic to Oligocene cover rocks emplaced during Late Cretaceous-Oligocene times. In its central part, it forms a major salient (the Pyrenean South-Central Unit) whose geometry is controlled by the areal distribution of the pre-orogenic Upper Triassic and synorogenic Eocene salt décollement layers. Both westwards and eastwards, the salient is fringed by Paleogene synorogenic deposits that are deformed by detachment folds with orientations ranging from N-S to E-W. In the western edge of the salient, the varying trend of the folds is a result of synorogenic vertical axis rotations (VAR) which caused the clockwise rotation of the folds from an initial predominant E-W trend to the current NW-SE to NNW-SSE trend. The salient, at least on its western part, developed from a progressive curve originated from divergent thrust transport directions and distributed shortening.</p><p>The aim of our study is to get a better understanding of the whole salient, by studying the kinematics of the deformation on the most frontal part of its eastern edge. Here, some sparse anticlockwise rotations have been reported but their origin and their possible relationship with the distribution of the salt décollements has not yet been addressed. For this purpose, 78 paleomagnetic sites have been sampled on the synorogenic upper Eocene-Oligocene materials of the NE Ebro foreland Basin, in the Artesa de Segre area, focusing on the limbs of oblique salt-cored anticlines (Ponts, Vilanova de l’Aguda, Cardona) which are detached above the synorogenic Eocene-Oligocene evaporites of the Cardona and the Barbastro formations. VAR analyses principally show anticlockwise rotations similar to those previously identified to the North in the Oliana Anticline, although a small number of clockwise rotations were also detected.</p><p>In addition to the VAR analysis, a magnetostratigraphic study of the Eocene-Oligocene continental materials of the northern limb of the Sanaüja Anticline has been conducted in order to constrain the age of these rotations from stratigraphic correlations. The demagnetization of 104 samples from a ca. 1100 m thick magnetostratigraphic section shows Priabonian to Rupelian ages for this succession. The integration of our results on timing, direction and magnitude of foreland VAR with previous paleomagnetic and structural data from both the western and eastern boundaries of the frontal thrust of the Pyrenean South-Central Unit will allow the understanding of the kinematics of the thrust salient as a whole.</p>

Vertical axis rotation of the upper portions of the north-east rift of Tenerife Island inferred from paleomagnetic data

2010 ◽  
Vol 492 (1-4) ◽  
pp. 40-59 ◽  
Author(s):  
A. Delcamp ◽  
M.S. Petronis ◽  
V.R. Troll ◽  
J.C. Carracedo ◽  
B. van Wyk de Vries ◽  
...  
Keyword(s):  
Vertical Axis ◽  
Paleomagnetic Data ◽  
North East ◽  
The North ◽  
Tenerife Island ◽  
Axis Rotation

Zircon geochronology and paleomagnetism of an Archean harzburgite intrusion, eastern Bighorn Mountains, Wyoming

2020 ◽  
Vol 57 (1) ◽  
pp. 21-40
Author(s):  
Alexandra Wallenberg ◽  
Michelle Dafov ◽  
David Malone ◽  
John Craddock
Keyword(s):  
Hanging Wall ◽  
Vertical Axis ◽  
Shear Zones ◽  
Strike Slip ◽  
Zircon Geochronology ◽  
Weighted Mean ◽  
Mafic Complex ◽  
Laramide Orogeny ◽  
Axis Rotation ◽  
Bighorn Mountains

A harzburgite intrusion, which is part of the trailside mafic complex) intrudes ~2900-2950 Ma gneisses in the hanging wall of the Laramide Bighorn uplift west of Buffalo, Wyoming. The harzburgite is composed of pristine orthopyroxene (bronzite), clinopyroxene, serpentine after olivine and accessory magnetite-serpentinite seams, and strike-slip striated shear zones. The harzburgite is crosscut by a hydrothermally altered wehrlite dike (N20°E, 90°, 1 meter wide) with no zircons recovered. Zircons from the harzburgite reveal two ages: 1) a younger set that has a concordia upper intercept age of 2908±6 Ma and a weighted mean age of 2909.5±6.1 Ma; and 2) an older set that has a concordia upper intercept age of 2934.1±8.9 Ma and a weighted mean age 2940.5±5.8 Ma. Anisotropy of magnetic susceptibility (AMS) was used as a proxy for magmatic intrusion and the harzburgite preserves a sub-horizontal Kmax fabric (n=18) suggesting lateral intrusion. Alternating Field (AF) demagnetization for the harzburgite yielded a paleopole of 177.7 longitude, -14.4 latitude. The AF paleopole for the wehrlite dike has a vertical (90°) inclination suggesting intrusion at high latitude. The wehrlite dike preserves a Kmax fabric (n=19) that plots along the great circle of the dike and is difficult to interpret. The harzburgite has a two-component magnetization preserved that indicates a younger Cretaceous chemical overprint that may indicate a 90° clockwise vertical axis rotation of the Clear Creek thrust hanging wall, a range-bounding east-directed thrust fault that accommodated uplift of Bighorn Mountains during the Eocene Laramide Orogeny.

Elusive Complexity : New Data from late Halaf Domuztepe in South Central Turkey

Paléorient ◽  
2003 ◽  
Vol 29 (2) ◽  
pp. 117-133 ◽  
Author(s):  
Elizabeth Carter ◽  
Stuart Campbell ◽  
Suellen Gauld
Keyword(s):  
South Central ◽  
Central Turkey

Three-Dimensional Computation during Off-Vertical Axis Rotation (OVAR) in Monkeys

2006 ◽  
Vol 65 (6) ◽  
pp. 429-439 ◽  
Author(s):  
Keisuke Kushiro ◽  
Jun Maruta
Keyword(s):  
Three Dimensional ◽  
Vertical Axis ◽  
Axis Rotation

OREL SECURITY OFFICER BORIS GORDON AND THE «RED CHAPEL»

2020 ◽  
Vol 9 (3) ◽  
pp. 164-175
Author(s):  
A.Yu. SARAN ◽  
◽  
M.V. SOKOLOV ◽  
Keyword(s):  
Central Asia ◽  
Nazi Germany ◽  
Career Ladder ◽  
Security Officer ◽  
State Security ◽  
Successful Career ◽  
The North ◽  
South Central ◽  
Foreign Countries ◽  
Party Work

The purpose of the article is to study the biography of B.M. Gordon as a successful security officer in the 1920-s and 1930-s. He worked his way up the career ladder from a junior investigator to the head of regional divisions – territorial bodies of the VChK/GPU/OGPU/NKVD and the legal residency of the INO GUGB of NKVD in Germany. Having started his chekist service in the Orel province, he served in the South – Central Asia, in the North – in Arkhangelsk province,in the capital of the USSR, and in the capital of Nazi Germany – Berlin. Gordon fought with the white guards and evicted the dispossessed peasants, controlled the Soviet military and gathered information about the armies of foreign countries; he managed to work at both Soviet and party work. Finally, the energetic work and successful career led Boris Moiseyevich Gordon to his death, when in 1937, J.V. Stalin decided to destroy completely all the former operational leadership of the state security agencies, replacing it with new personnel.

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