scholarly journals A model of the tectonic development of Irtysh shear zone in terms of present day radioisotope data

2021 ◽  
pp. 5-9
Author(s):  
Y.V Ponomareva ◽  
M.V Ponomareva ◽  
A.V Sadchikov ◽  
N.V. Zhelayeva
Keyword(s):  
Shear Zone ◽  
Field Research ◽  
Structural Data ◽  
Tectonic Model ◽  
Multi Stage ◽  
Structural Relationships ◽  
Icp Ms ◽  
Tectonic Development ◽  
The Given ◽  
Uranium Lead Dating

Purpose. To present the model of tectonic development of the Irtysh shear zone, based on recent uranium-lead dating for zircon. Methodology. The authors analyzed the results of studies of foreign and domestic scientists, conducted field research, sample preparation, carried out iso-tope studies using SHRIMP-2 and LA-ICP-MS technology; determined small elements by the fusion method using ICP. Findings. Based on more than ten uranium-lead dating for zircon using the local method and the given geological and structural data, model of the Irtysh shear zone tectonic development has been proposed Originality. A tectonic model has been developed and the age and structural relationships of the Irtysh shear zone with the Kalba-Narym zone based on uranium-lead zircon dating have been established. Practical value. The article considers the structural and age relationships of the Irtysh crush zone which prove its formation along the deep Irtysh fault in the course of a long multi-stage tectogenesis.

Trace-element study and uranium-lead dating of perovskite from the Afrikanda plutonic complex, Kola Peninsula (Russia) using LA-ICP-MS

2010 ◽  
Vol 100 (3-4) ◽  
pp. 95-103 ◽  
Author(s):  
Ekaterina P. Reguir ◽  
Alfredo Camacho ◽  
Panseok Yang ◽  
Anton R. Chakhmouradian ◽  
Vadim S. Kamenetsky ◽  
...  
Keyword(s):  
Trace Element ◽  
Kola Peninsula ◽  
Icp Ms ◽  
Plutonic Complex ◽  
Trace Element Study ◽  
Uranium Lead Dating ◽  
Element Study

scholarly journals A weapon in the battle of definitions: a special rhetorical strategy in Hánfēizǐ

2014 ◽  
Vol 68 (4) ◽  
pp. 969-999
Author(s):  
Lukáš Zádrapa
Keyword(s):  
Textual Analysis ◽  
Building Blocks ◽  
Warring States Period ◽  
Rhetorical Strategy ◽  
Semantic Relationships ◽  
Lexical Semantic ◽  
Warring States ◽  
Structural Relationships ◽  
Textual Strategies ◽  
The Given

Abstract Regardless of the actual views on the art of embellished speech of the author(s) presented by the collection of essays known as Hánfēizǐ, the work is well known for its formal intricacy and refinement. The composition of several chapters appears unique against the background of other transmitted texts of the Warring States period, and the same is true of some textual strategies serving to convey the presented ideas with intensified rhetorical appeal. In this study, I aim to identify one of these strategies, showing, on the basis of thorough textual analysis, how the sections in which it is employed are structured and how the given devices contribute to the construction of meaning. Relevant parts of the chapters 45 (“Guǐshǐ” 詭使), 46 (“Liùfǎn” 六反) and 47 (“Bāshuō” 八說) are analyzed here both with regard to their formal features, such as various arrangements of basic building blocks or transformations of metalinguistic formulae, and to their semantics, including the systematic lexical-semantic relationships of synonymy and antonymy. It is argued that not only overt interventions by the author in favour of “correct” definitions of selected terms, but also the very inventory of the terms itself and their deeper structural relationships and tensions reveal much about the author's intentions and opinions.

Deformation history of the Marmara Granitoid and implications for a dextral shear zone in NW Anatolia

2020 ◽  
Author(s):  
Salim Birkan Bayrak ◽  
Işıl Nur Güraslan ◽  
Alp Ünal ◽  
Ömer Kamacı ◽  
Şafak Altunkaynak ◽  
...  
Keyword(s):  
Shear Zone ◽  
Boundary Migration ◽  
Microstructural Analysis ◽  
Structural Data ◽  
Ductile Deformation ◽  
Brittle Deformation ◽  
Deformation History ◽  
Shear Sense ◽  
History Of ◽  
Dextral Shear

<p>Marmara granitoid (47 Ma) is a representative example of the Eocene post-collisional magmatism which produced several granitic plutons in NW Anatolia, Turkey. It is a W-E trending sill-like magmatic body which was concordantly emplaced into the metamorphic basement rocks of Erdek Complex and Saraylar Marble. The granitoid is represented by deformed granodiorite which displays well-developed lineation and foliation in meso-scale defined by the elongation of mica and feldspar crystals and recrystallization of quartz however, in some places, magmatic textures are preserved. Deformed granodiorite is broadly cut by aplitic and pegmatitic dikes and contains mafic enclaves which display the same deformation indicators with the main granitoid.</p><p>Microstructural analysis shows that the solid-state deformation of the Marmara granitoid is classified as ductile deformation with high temperatures and ductile-to-brittle deformation with relatively lower temperatures. Evidence for the ductile deformation of the granitoid is represented by chessboard extinction of quartz, grain boundary migration (GBM) and subgrain rotation recrystallisation (SGR) which exhibits that the deformation temperature changed from 600 <sup>o</sup>C to 400<sup>o</sup>C. Bulging recrystallization (BLG), grain size reduction of amphibole, biotite and plagioclases and microcracks on plagioclases were considered as overlying ductile-to-brittle deformation signatures which develop between 300-<250 <sup>o</sup>C temperatures.</p><p>All of these field and micro-structural data collectively suggest that the shear sense indicators such as micafish structures and δ type mantled porphyroclasts displayed stair-steppings pointing out to a right lateral movement, indicating that the structural evolution and deformation history of Marmara granitoid was controlled by a dextral shear zone.</p>

scholarly journals Results of Experiments for Determining the Influence of Blade Profile Changes and Manufacturing Tolerances on the Efficiency, the Enthalpy Drop, and the Mass Flow of Multi-Stage Axial Turbines

1970 ◽  
Author(s):  
K. Bammert ◽  
H. Stobbe
Keyword(s):  
Mass Flow ◽  
Turbine Blades ◽  
Production Costs ◽  
Steam Turbines ◽  
Blade Profile ◽  
Multi Stage ◽  
Profile Changes ◽  
Manufacturing Tolerances ◽  
Axial Turbines ◽  
The Given

When gas and steam turbines are in use, the blade profiles can be thinned by corrosion or erosion and thickened under the influence of deposit formation, thus causing a reduction in efficiency and lifetime. During the production of turbine blades, it is possible that the profiles often become thinner or thicker than the given specified profiles, also causing a decline in efficiency. In addition, the production costs of turbine blades are, to a considerable extent, dependent on the manufacturing tolerances. This report details the effects of thinning and thickening of the profiles on the efficiency, the drop, and the mass flow of multi-stage axial turbines.

scholarly journals Results of the reinterpretation of materials of IV geotraverse of NHS (PK 295- 400) in the central part of the Holovanivsk suture zone

2021 ◽  
pp. 58-64
Author(s):  
O.A. Trypolsky ◽  
◽  
O.V. Topoliuk ◽  
O.O. Trypolska ◽  
O.B. Gintov ◽  
...  
Keyword(s):  
Shear Zone ◽  
Fault Zone ◽  
Deep Structure ◽  
Suture Zone ◽  
The Body ◽  
Intrusive Body ◽  
Seismic Section ◽  
Supply Channel ◽  
Host Rocks ◽  
The Given

This work provides the reinterpretation results of the research outcomes with the DSS method on geotraverse IV on section PK 295-400 in order to clarify a seismic section in the Holovanivsk area of high gravity. A number of points of diffraction and seismic sites have been identified in Earth’s crust (at a depth of 2-60 km), which gives an opportunity to considerably specify the data on the deep structure of the studied area. The position in a section of the Talnivska fault zone is clarified due to the identification of additional points of diffraction and a large number of short reflective elements at a depth of 2-8 km. In the central part of the section (PK 338-355), horizontal and inclined elements (at the depths of 2-9 km and 24-44 km) and a series of short steeply inclined reflective elements (at depths of 8-26 km) form the area of the medium which at the depth of 2-44 km differs in its characteristics from the host rocks. This allowed tracing the listriс shear zone that stretches continuously from a depth of 8 km on PK 355 to 44 km on PK 304. All this, as well as available seismotomographic data, allows us to suppose that the Talnivska fault zone is traced up to depths of 100-600 km as a boundary between blocks with different Vp velocities and degrees and gaps in the Golitsyn—Geiko layer. The listriс shear zone is connected to the main part of the Talnivska fault zone near the surface. According to the given re-interpretation of GSS data on geotraverse IV, the supply channel of the intrusive body of hyperbasites is rather narrow at depths of 60-33 km, and starting only from depth of 30 km and almost to the surface the body expands up to 15 km in width. Focusing on the area of increased Vp velocities at a depth of 2-33 km, one can assume that the main intrusive body that consists of hyperbasites and basite-Dunites, peridotites, pyroxenites, gabbro, and amphibolites, the density of which exceeds the density of rocks by 0.1-0.22 g/cm3, is located at these depths along the axis of the central part of the Holovanivsk suture zone.

scholarly journals Supplemental Material: Two key switches in regional stress field during multi-stage deformation in the Carboniferous–Triassic southernmost Altaids (Beishan, NW China): Response to orocline-related roll-back processes

2021 ◽  
Author(s):  
Zhonghua Tian ◽  
W.J. Xiao ◽  
et al.
Keyword(s):  
Shear Zone ◽  
Analytical Method ◽  
Electron Backscatter Diffraction ◽  
Age Dating ◽  
Ophiolitic Mélange ◽  
Multi Stage ◽  
Step Heating ◽  
Backscatter Diffraction ◽  
Roll Back ◽  
Supplementary Data Table

Table S1: (STS1) Samples collected near the study area; Table S2: Sample information from the shear zone and mélange zone: Table S3: (1) U-Pb isotope dates of magmatic zircons in granitic mylonites (11HYJ02 and 11QJJ01) from the Huoshishan ophiolitic mélange and the Qijiaojing shear zone. See Figure 2 for sample locations, (2) 40Ar/39Ar step-heating results of muscovites and biotite in granitic mylonites (11QJJ01, 11HYJ02, 11HYJ01-2, 11HYJ04 and 10TZHD03) from the Hongyangjing shear zone, the Huoshishan ophiolitic mélange, and the Qijiaojing shear zone. See Figure 2 for sample locations, (3) Methods：Methods divide into analytical method-EBSD (Electron backscatter diffraction), analytical method-U-Pb age dating, analytical method- 39Ar-40Ar age dating; Table S4. the raw data of 40Ar/39Ar from Institute of Geology and Geophysics, Chinese Academy of Science (IGGCAS) are given in the Supplementary data Table S4.

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