Curvature increase and structural evolution of the core (Cantabrian zone) of the Ibero-Armorican arc

1984 ◽  
Vol 37 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Manuel Julivert ◽  
Maria-Luisa Arboleya
Keyword(s):  
Structural Evolution ◽  
Cantabrian Zone ◽  
The Core

Emplacement of the Cuera and Picos de Europa imbricate system at the core of the Iberian-Armorican arc (Cantabrian zone, north Spain): New precisions concerning the timing of arc closure

2009 ◽  
Vol 121 (5-6) ◽  
pp. 729-751 ◽  
Author(s):  
O. A. Merino-Tome ◽  
J. R. Bahamonde ◽  
J. R. Colmenero ◽  
N. Heredia ◽  
E. Villa ◽  
...  
Keyword(s):  
Cantabrian Zone ◽  
The Core

Structural Evolution and Formation Mechanism of the Soft Colloidal Arrays in the Core of PAAm Nanofibers by Electrospun Packing

Langmuir ◽  
2017 ◽  
Vol 33 (39) ◽  
pp. 10291-10301 ◽  
Author(s):  
Qifeng Mu ◽  
Qingsong Zhang ◽  
Lu Gao ◽  
Zhiyong Chu ◽  
Zhongyu Cai ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Structural Evolution ◽  
The Core ◽  
Colloidal Arrays

scholarly journals Stochastic modelling of urban structure

2018 ◽  
Vol 474 (2213) ◽  
pp. 20170700 ◽  
Author(s):  
L. Ellam ◽  
M. Girolami ◽  
G. A. Pavliotis ◽  
A. Wilson
Keyword(s):  
Spatial Interaction ◽  
Structural Evolution ◽  
Interaction Model ◽  
Stochastic Modelling ◽  
Urban Structure ◽  
Spatial Interaction Models ◽  
The Core ◽  
Structural Variables ◽  
Core Elements

The building of mathematical and computer models of cities has a long history. The core elements are models of flows (spatial interaction) and the dynamics of structural evolution. In this article, we develop a stochastic model of urban structure to formally account for uncertainty arising from less predictable events. Standard practice has been to calibrate the spatial interaction models independently and to explore the dynamics through simulation. We present two significant results that will be transformative for both elements. First, we represent the structural variables through a single potential function and develop stochastic differential equations to model the evolution. Second, we show that the parameters of the spatial interaction model can be estimated from the structure alone, independently of flow data, using the Bayesian inferential framework. The posterior distribution is doubly intractable and poses significant computational challenges that we overcome using Markov chain Monte Carlo methods. We demonstrate our methodology with a case study on the London, UK, retail system.

Synthesis and Characteristic of NiFe/NiFe2O4 Core-Shell Magnetic Nanocomposite Particles

2012 ◽  
Vol 486 ◽  
pp. 65-69
Author(s):  
Jun Hu ◽  
Ai Min Chen
Keyword(s):  
Structural Evolution ◽  
Treatment Temperature ◽  
Oxide Shell ◽  
Core Shell ◽  
Nanocomposite Particles ◽  
X Ray ◽  
The Core ◽  
Transmission Electron ◽  
Diffraction Patterns ◽  
Feni Alloy

NiFe/NiFe2O4 core-shell bimagnetic nanocomposite particles were successfully synthesized by colloidal chemical method combined with H2 reduction. The whole structural evolution process has been well studied through analysis of X-ray diffraction patterns and Infrared spectra. It has been found that FeNi alloy concentrated in the ferrite phase. The core/shell structure, a FeNi alloy core surrounded by NiFe2O4 spinel oxide shell were verified by X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM). The influence of post H2 heat treatment temperature on nanoparticles was investigated. The core-shell NiFe/ NiFe2O4 nanoparticles was about 100 nm after reduced at 727 K, The powders exhibited paramagnetic properties and the magnetization was 29.9 emu·g-1.

scholarly journals Structural Evolution of Reoviridae Revealed by Oryzavirus in Acquiring the Second Capsid Shell

2008 ◽  
Vol 82 (22) ◽  
pp. 11344-11353 ◽  
Author(s):  
Naoyuki Miyazaki ◽  
Tamaki Uehara-Ichiki ◽  
Li Xing ◽  
Leif Bergman ◽  
Akifumi Higashiura ◽  
...  
Keyword(s):  
Structural Evolution ◽  
Amino Acid Sequences ◽  
Core Structure ◽  
Icosahedral Symmetry ◽  
Cytoplasmic Polyhedrosis Virus ◽  
The Core ◽  
Capsid Shell ◽  
The Family ◽  
Virion Structure ◽  
Rice Ragged Stunt Virus

ABSTRACT The conservation of the core structure and diversification of the external features among the turreted reoviruses appear to be relevant to structural evolution in facilitating the infection of diverse host species. The structure of Rice ragged stunt virus (RRSV), in the genus Oryzavirus of the family Reoviridae, is determined to show a core composed of capsid shell, clamps, and long turrets. The RRSV core structure is equivalent to the core structure of Orthoreovirus and the virion structure of Cytoplasmic polyhedrosis virus (CPV). In RRSV, five peripheral trimers surround each long turret and sit at the Q trimer position in the T=13l icosahedral symmetry, a structural feature unique to turreted reoviruses. That is, the core of RRSV is partially covered by 60 copies of the peripheral trimer. In contrast, the core of Orthoreovirus is covered by 200 copies of the trimer that sit at the Q, R, S, and T trimer positions. Our results suggest that among the three viruses, RRSV has a structure intermediate between that of Orthoreovirus and the CPV virion. This conclusion coincides with the results of the phylogenetic analysis of amino acid sequences of RNA-dependent RNA polymerases.

scholarly journals Tectonothermal evolution in the core of an arcuate fold and thrust belt: the southeastern sector of the Cantabrian Zone (Variscan belt, NW Spain)

2016 ◽  
Author(s):  
M. L. Valín ◽  
S. García-López ◽  
C. Brime ◽  
F. Bastida ◽  
J. Aller
Keyword(s):  
Gravitational Instability ◽  
Local Development ◽  
Contact Metamorphism ◽  
Low Grade ◽  
Variscan Belt ◽  
Thrust Belt ◽  
Cantabrian Zone ◽  
Grade Metamorphism ◽  
The Core ◽  
Fold And Thrust Belt

Abstract. Abstract. The tectonothermal evolution of an area located in the core of the Ibero-Armorican arc (Variscan belt) has been determined by using the conodont color alteration index (CAI), Kübler index of illite (KI), the Árkai index of chlorite (AI), and the analysis of clay minerals and rock cleavage. The area is part of the Cantabrian Zone (CZ), which represents the foreland fold and thrust belt of the orogen. It has been thrust by several large units of the CZ, what resulted in the generation of a large amount of synorogenic Carboniferous sediments. CAI, KI and AI values show an irregular distribution of metamorphic grade, independent of stratigraphic position. Two tectonothermal events have been distinguished in the area. The first one, poorly defined, is mainly located in the northern part. It gave rise to very low-grade metamorphism in some areas and it was associated with a deformation event that resulted in the emplacement of the last large thrust unit and development of upright folds and associated cleavage (S1).The second tectonothermal event gave rise to low-grade metamorphism and cleavage (S2) crosscutting earlier upright folds in the central, western and southern parts of the study area. The event continued with the intrusion of small igneous rock bodies, which gave rise to contact metamorphism and hydrothermal alteration. The second event was linked to an extensional episode due to a gravitational instability at the end of the Variscan deformation. This tectonothermal evolution occurred during the Gzhelian-Sakmarian. Subsequently, several hydrothermal episodes took place, in association with local development of crenulation cleavage during the Alpine deformation.

scholarly journals Tectonothermal evolution in the core of an arcuate fold and thrust belt: the south-eastern sector of the Cantabrian Zone (Variscan belt, north-western Spain)

Solid Earth ◽  
2016 ◽  
Vol 7 (4) ◽  
pp. 1003-1022 ◽  
Author(s):  
María Luz Valín ◽  
Susana García-López ◽  
Covadonga Brime ◽  
Fernando Bastida ◽  
Jesús Aller
Keyword(s):  
Gravitational Instability ◽  
Contact Metamorphism ◽  
Low Grade ◽  
Variscan Belt ◽  
Thrust Belt ◽  
Cantabrian Zone ◽  
Grade Metamorphism ◽  
The Core ◽  
Kübler Index ◽  
Fold And Thrust Belt

Abstract. The tectonothermal evolution of an area located in the core of the Ibero-Armorican Arc (Variscan belt) has been determined by using the conodont colour alteration index (CAI), Kübler index of illite (KI), the Árkai index of chlorite (AI) and the analysis of clay minerals and rock cleavage. The area is part of the Cantabrian Zone (CZ), which represents the foreland fold and thrust belt of the orogen. It has been thrust by several large units of the CZ, what resulted in the generation of a large number of synorogenic Carboniferous sediments. CAI, KI and AI values show an irregular distribution of metamorphic grade, independent of stratigraphic position. Two tectonothermal events have been distinguished in the area. The first one, poorly defined, is mainly located in the northern part. It gave rise to very-low-grade metamorphism in some areas and it was associated with a deformation event that resulted in the emplacement of the last large thrust unit and development of upright folds and associated cleavage (S1). The second tectonothermal event gave rise to low-grade metamorphism and cleavage (S2) crosscutting earlier upright folds in the central, western and southern parts of the study area. The event continued with the intrusion of small igneous rock bodies, which gave rise to contact metamorphism and hydrothermal alteration. This event was linked to an extensional episode due to a gravitational instability at the end of the Variscan deformation. This tectonothermal evolution occurred during the Gzhelian–Sakmarian. Subsequently, several hydrothermal episodes took place and local crenulation cleavage developed during the Alpine deformation.

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