COMPARATIVE ANALYSIS OF TECTONIC STRUCTURES OF THE NORTH-EASTERN AND EASTERN FRAMING OF THE SIBERIAN PLATFORM (NORTH-EAST ASIA)

Author(s):  
Dmitry Vasiliev
Author(s):  
Г.П. Яроцкий

Показана система северо-западных разломов, определивших продольную зональность региональных геоструктур активной окраины Северо-Востока Азии. Они обусловили линейные и гнездовые вулканогены Северо-Западно- и Юго-Восточно-Корякских орогенных поясов и связь с ними рудных районов. Поперечные разломы создают условия субвертикальных движений окраины геоструктур: погружения и воздымания. В килях слоёв прогнутых горизонтов и замках – выгнутых, возникают продольно-осевые разломы – зоны максимальных геодинамических напряжений. На их сочленении с глубинными границами разновозрастных морских террейнов образуются вертикальные сейсмогенные колонны с гипоцентрами сильных (М > 6,6) землетрясений Корякского сейсмичного пояса. The abstract presents the system of NW faults determining longitudinal zonation of regional geo-structures on the North-East Asia active margin. They defined linear and nested volcanogenic rocks of NW and SE Koryak orogenic belts and their association with ore regions. Transverse faults resulted in possible near-vertical dipping or uplifting of marginal geo-structures. Longitudinal-axial faults are zones of maximum geodynamic stresses arising in troughs of down-horizons’ layers and in curves of convex horizon’s layers. Vertical seismogenic columns with hypocenters of strong (M > 6,6) earthquakes of the Koryak seismic belt are formed on their junction with deep boundaries of multi-aged marine terrains.


Author(s):  
Sergey B. Kuklev ◽  
Vladimir A. Silkin ◽  
Valeriy K. Chasovnikov ◽  
Andrey G. Zatsepin ◽  
Larisa A. Pautova ◽  
...  

On June 7, 2018, a sub-mesoscale anticyclonic eddy induced by the wind (north-east) was registered on the shelf in the area of the city of Gelendzhik. With the help of field multidisciplinary expedition ship surveys, it was shown that this eddy exists in the layer above the seasonal thermocline. At the periphery of the eddy weak variability of hydrochemical parameters and quantitative indicators of phytoplankton were recorded. The result of the formation of such eddy structure was a shift in the structure of phytoplankton – the annual observed coccolithophores bloom was not registered.


2017 ◽  
Vol 98 (7) ◽  
pp. 1619-1644 ◽  
Author(s):  
Alexandre Dias Pimenta ◽  
Bruno Garcia Andrade ◽  
Ricardo Silva Absalão

A taxonomic revision of the Nystiellidae from Brazil, including samples from the Rio Grande Rise, South Atlantic, was performed based on shell morphology. Five genera and 17 species were recognized. For the richest genus,Eccliseogyra, the three species previously recorded from Brazil were revised:E. brasiliensisandE. maracatu, previously known only from their respective type series, were re-examined. Newly available material ofE. maracatuexpanded the known geographic range of this species to off south-east Brazil.Eccliseogyra nitidais now recorded from north-eastern to south-eastern Brazil, as well as from the Rio Grande Rise. Three species ofEccliseogyraare newly recorded from the South Atlantic:E. monnioti, previously known from the north-eastern Atlantic, occurs off eastern Brazil and on the Rio Grande Rise; its protoconch is described for the first time, confirming its family allocation.Eccliseogyra pyrrhiasoccurs off eastern Brazil and on the Rio Grande Rise, andE. folinioff eastern Brazil. The genusIphitusis newly recorded from the South Atlantic.Iphitus robertsiwas found off northern Brazil, although the shells show some differences from the type material, with less-pronounced spiral keels. Additional new finds showed thatIphitus cancellatusranges from eastern Brazil to the Rio Grande Rise, and Iphitusnotiossp. nov. is restricted to the Rio Grande Rise.Narrimania, previously recorded from Brazil based on dubious records, is confirmed, including the only two living species described for the genus:N. azelotes, previously only known from the type locality in Florida, andN. concinna, previously known from the Mediterranean. A third species,Narrimania raquelaesp. nov. is described from eastern Brazil, diagnosed by its numerous and thinner cancellate sculpture. To the three species ofOpaliopsispreviously known from Brazil, a fourth species,O. arnaldoisp. nov., is added from eastern Brazil, and diagnosed by its very thin spiral sculpture, absence of a varix, and thinner microscopic parallel axial striae.Papuliscala nordestina, originally described from north-east Brazil, is recorded off eastern Brazil and synonymized withP. elongata, a species previously known only from the North Atlantic.


2021 ◽  
pp. 117-126
Author(s):  
R.I. Mashkovtsev ◽  
M.I. Rakhmanova ◽  
D.A. Zedgenizov

2010 ◽  
Vol 41 (2) ◽  
pp. 273
Author(s):  
Michael J Kelly ◽  
Sean Watts

In the aftermath of the Cold War, many began to question the continuing efficacy, or at least call for reform, of collective security structures such as the North Atlantic Treaty Organization and the United Nations Security Council. Yet, North East Asia never enjoyed a formal, institutionalised collective security structure. As Russia and the United States recede and China emerges in North East Asia, this article questions whether now is the time to consider such an arrangement. Financially, Japan and South Korea are locked into a symbiotic relationship with China (as is the United States), while the government in Beijing continues to militarise and lay territorial and maritime claims to large areas of the region. Moreover, the regime in North Korea, with its new nuclear capabilities, remains unpredictable. Consequently, central components to the question of collective security in North East Asia are the equally vexing questions of what to do about North Korea and whether a new formalised security arrangement would include or exclude the People's Republic of China.


1994 ◽  
Vol 161 ◽  
pp. 21-33
Author(s):  
H.F Jepsen ◽  
J.C Escher ◽  
J.D Friderichsen ◽  
A.K Higgins

Late Archaean and Early Proterozoic crust-forming events in North-East and eastern North Greenland were succeeded by Middle Proterozoic sedimentation and volcanic activity; Late Proterozoic through Tertiary sedimentation was interrupted by several periods of tectonic activity, including the Caledonian orogeny in East Greenland and the Mesozoic deformation of the Wandel Hav mobile belt. Photogeological studies helped pinpoint areas of special interest which were investigated during the short 1993 field season. Insights gained during field work include: the nature of the crystalline basement terrain in the Caledonian fold belt, redefinition of the upper boundary of the Upper Proterozoic Rivieradal sandstones, revision of Caledonian nappe terminology, and the northern extension of the Caledonian Storstrømmen shear zone.


2021 ◽  
Vol 5 (S4) ◽  
pp. 927-941
Author(s):  
Den Sik Kan ◽  
Volodymyr M. Vasylchuk ◽  
Leonid V. Chuprii ◽  
Igor B. Datskiv ◽  
Kateryna P. Kravets

The paper covers relevant issues, such as the current state of the tourism services sector in China, Japan, and South Korea. The significance is confirmed by the growing role of the North-East Asian countries in the world trade in services and the growing contribution of tourism to the global gross domestic product. The purpose of this study is to identify the features, problems, and prospects for the development of the tourism services sector in China, Japan, and South Korea. The paper uses methods of systematisation and typification, which made it possible to determine the specifics of the development of cultural tourism in the Far Eastern region among the current range of opinions and areas of cultural tourism research. The study uses the principles of historicism and objectivity, which allowed analysing the development and current state of tourist exchange. A cultural approach was also used to reconstruct the cultural and humanitarian population of North-East Asia through the mutual enrichment of nations and people. The systematic approach made it possible to understand the importance of humanitarian exchange between people and identified the universality of tourism.


Author(s):  
J.R. Ellis ◽  
M.G. Pawson ◽  
S.E. Shackley

The stomach contents of ten species of elasmobranch from the north-eastern Atlantic indicate that most are generalist predators, eating a variety of polychaetes, molluscs, crustaceans and teleosts. Two species, Mustelus asterias and Squatina scjuatina were found to be specialist feeders, consuming portunid crabs and pleuronectids, respectively. Measures for both dietary breadth and dietary overlap are given and the implications of elasmobranch predation on the prey communities and on commercial species are discussed.


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