Metallogeny of the Pacific Northwest (Russian Far East): Tectonics, Magmatism and Metallogeny of Active Continental Margins. (A. I. Khanchuk, G.A. Gonevchuk, and R. Seltmann, ed..

2005 ◽  
Vol 100 (2) ◽  
pp. 400-401
Author(s):  
Craig Hart
Keyword(s):  
Pacific Northwest ◽  
Russian Far East ◽  
Far East ◽  
Continental Margins ◽  
The Pacific ◽  
Active Continental Margins

Causes of the Occurrence of A-Type Volcanic Rocks in Active Continental Margins (Southern Sikhote-Alin, Russian Far East)

2021 ◽  
Vol 62 (2) ◽  
pp. 207-222
Author(s):  
A.V. Grebennikov ◽  
S.O. Maksimov
Keyword(s):  
Russian Far East ◽  
Far East ◽  
Volcanic Rocks ◽  
Sudden Change ◽  
Apical Part ◽  
Igneous Rocks ◽  
Geochemical Data ◽  
Southern Primorye ◽  
The Pacific ◽  
Active Continental Margins

Abstract ––New isotope-geochemical data on the volcanic complexes of the South Yakut and Martel volcanic depressions in southern Primorye are presented. Their formation in the early Eocene (54.3 Ma) and Late Cretaceous (83.5 Ma), respectively, is evidenced by U–Pb zircon dating (LA-ICP-MS). Based on the geochemical characteristics, it is concluded that the volcanics are typical A-type igneous rocks. Their formation coincides with the sudden change in the vector of motion of the Pacific slab with respect to the continent in the Campanian and Paleocene–Eocene, which caused destruction of the slab with its probable discontinuity and the injection of the subslab asthenosphere. The effect of mantle fluids on the continental lithospheric-rock melting determined the generation of magmas with the specific geochemical features of A-type igneous rocks. The regularities of their composition are due to the deep-seated reduced F-rich fluids that caused the intense differentiation of magmas accumulating fluidized melts enriched in mobile components in the apical part.

scholarly journals A biogeographic network reveals evolutionary links between deep-sea hydrothermal vent and methane seep faunas

2016 ◽  
Vol 283 (1844) ◽  
pp. 20162337 ◽  
Author(s):  
Steffen Kiel
Keyword(s):  
Pacific Ocean ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
Subduction Zones ◽  
Continental Margins ◽  
Stepping Stones ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Active Continental Margins ◽  
Ocean Ridge

Deep-sea hydrothermal vents and methane seeps are inhabited by members of the same higher taxa but share few species, thus scientists have long sought habitats or regions of intermediate character that would facilitate connectivity among these habitats. Here, a network analysis of 79 vent, seep, and whale-fall communities with 121 genus-level taxa identified sedimented vents as a main intermediate link between the two types of ecosystems. Sedimented vents share hot, metal-rich fluids with mid-ocean ridge-type vents and soft sediment with seeps. Such sites are common along the active continental margins of the Pacific Ocean, facilitating connectivity among vent/seep faunas in this region. By contrast, sedimented vents are rare in the Atlantic Ocean, offering an explanation for the greater distinction between its vent and seep faunas compared with those of the Pacific Ocean. The distribution of subduction zones and associated back-arc basins, where sedimented vents are common, likely plays a major role in the evolutionary and biogeographic connectivity of vent and seep faunas. The hypothesis that decaying whale carcasses are dispersal stepping stones linking these environments is not supported.

scholarly journals The Oldest Ceramics of East Asia: Current Research Questions (Materials for the Educational Course “Ceramics as an Archaeological Source”)

2020 ◽  
Vol 19 (7) ◽  
pp. 10-33
Author(s):  
Irina S. Zhushchikhovskaya ◽  
Lyudmila N. Mylnikova
Keyword(s):  
East Asia ◽  
Russian Far East ◽  
Far East ◽  
Northern China ◽  
Ceramic Technology ◽  
Ancient Ceramics ◽  
Cultural Traditions ◽  
The Pacific ◽  
Ceramic Vessels ◽  
The Japanese Archipelago

Purpose. The article presents a historiographical review of the problems of research of ancient ceramics from archaeological sites of East Asia in the chronological interval from 20,000–18,000 to 9,000 years ago. Results. The subject of discussion is the periodization of monuments with early ceramics, the problems of socio-economic conditions of the emergence of pottery technology, its functional role in ancient societies, reconstruction of technological skills and technical levels of pottery, morphology and decor. There are a lot of controversial issues and “blind spots” in this direction. However, the opening of sites with ancient ceramics in East Asia showed that here, on the Pacific (eastern) outskirts of the Eurasian continent, pottery making technology first appeared about 10,000 years earlier than in the Middle East. The invention of ceramics in this region of the world at the turn of the Pleistocene and Holocene should be considered as a result of a combination of natural and social factors. The example of East Asia shows that the relationship between the appearance of ceramic vessels and the development of agriculture, as a technology for food production, is universally, not a mandatory factor. Conclusion. The article discusses certain regional differences in the formation of skills in making the most ancient ceramic vessels of East Asia. It is assumed that the development of ceramic technology in the Japanese archipelago and in the mainland areas of East Asia took place independently. For the Amur region, there are two local cultural traditions – Osipovskaya and Gromatukhinskaya. According to materials from Northern China, there is a version of the existence of a common line in the development of ancient ceramics in the Valley of the Nonny River. There are similarities between the early ceramics of Northeast China, and the Gromatukhinskaya and Osipovskaya cultures of Amur. For the ceramics of South Korea also note similarities with the materials of the Russian Far East, Japanese and Chinese dishes.

ECOLOGICAL NICHE OF COMMELINA COMMUNIS (COMMELINACEAE) IN THE PRIMORYE TERRITORY (THE RUSSIAN FAR EAST)

2020 ◽  
Vol 68 ◽  
pp. 90-110
Author(s):  
V.P. Seledets ◽  
◽  
N.S. Probatova ◽  
Keyword(s):  
Pacific Coast ◽  
Russian Far East ◽  
Far East ◽  
Ecological Factors ◽  
The South ◽  
Natural Area ◽  
Commelina Communis ◽  
The Pacific ◽  
Soil Moisture Variability ◽  
The Russian Far East

On the example of Commelina communis L. (Commelinaceae), the typical weed in the south of the Russian Far East, it has been demonstrated that the invasive activity of species significantly increases in conditions of the Pacific monsoon climate. The range of the most important ecological factors (humidity, richness and salinity of soil, the soil texture as well as soil moisture variability) in the Pacific coast is wider than in continental areas. It is quite possible that in the south of Primorye Territory we have the northern part of the Commelina communis natural area of distribution.

scholarly journals First record of the enigmatic coleoid genus Longibelus from Sakhalin (Far East Russia): a contribution to our understanding of Cretaceous coleoid habitats in the Pacific Realm

2021 ◽  
Vol 140 (1) ◽  
Author(s):  
Elena A. Jagt-Yazykova ◽  
Martin Košťák ◽  
John W. M. Jagt
Keyword(s):  
Pacific Coast ◽  
Natural Habitat ◽  
Russian Far East ◽  
Far East ◽  
First Record ◽  
The Pacific ◽  
Mass Occurrence ◽  
East Russia ◽  
The Russian Federation ◽  
Geochemical Analyses

AbstractA newly collected specimen of the enigmatic coleoid genus Longibelus is recorded from lower Turonian strata along the River Shadrinka in Sakhalin (Russian Far East). To date, this is the first record of Late Cretaceous coleoid cephalopods from the island and, in fact, from the entire Pacific coast of the Russian Federation. Lithological characteristics, coupled with published geochemical analyses (δ13C and Corg content), suggest the habitat of this coleoid taxon to have been the middle to outer (i.e. distal) shelf. Its provenance from the stratigraphical level that is known as the Scaphites Event, characterised by a mass occurrence of Scaphites and Yesoites, may be indicative of occasional or marginal overlap in ranges, rather than life in similar habitats. On the basis of lithological features and in view of the extremely rare occurrence of Longibelus in rich ammonite assemblages with clear ecological/bathymetric preferences, the natural habitat of Longibelus may have comprised neritic to mesopelagic zones over distal shelves and slopes.

Spodoptera litura (taro caterpillar).

2021 ◽  
Author(s):  
Koen Maes
Keyword(s):  
Pacific Islands ◽  
Insect Pests ◽  
Russian Far East ◽  
Far East ◽  
Agricultural Crops ◽  
Closely Related Species ◽  
The Pacific ◽  
Temperate Asia ◽  
The Uk ◽  
Tobacco Caterpillar

Abstract The tobacco caterpillar, S. litura, is one of the most important insect pests of agricultural crops in the Asian tropics. It is widely distributed throughout tropical and temperate Asia, Australasia and the Pacific Islands (Feakin, 1973; Kranz et al., 1977). Records of S. litura having limited distribution in (or being eradicated from) Germany, Russian Federation, Russian Far East, the UK and Réunion may in fact refer to S. littoralis. Both S. litura and S. littoralis are totally polyphagous (Brown and Dewhurst, 1975; Holloway, 1989) and therefore have huge potential to invade new areas and/or to adapt to new climatic and/or ecological situations. The Spodoptera group consists of closely related species with similar ecology that are difficult to identify to species level.

scholarly journals Administrative and Tax Regimes in the Russian Far East: Cooperation between Investors and the State

2021 ◽  
Vol 17 (2) ◽  
pp. 16-33
Author(s):  
Maksim Krivelevich ◽  
Keyword(s):  
Economic Development ◽  
Russian Far East ◽  
Far East ◽  
Significant Proportion ◽  
Economic Benefits ◽  
The State ◽  
The Pacific ◽  
Tax Regimes ◽  
The Government ◽  
The Russian Far East

Administrative and tax regimes Free ‘Port of Vladivostok (SPV)’ and ‘Territories of Advanced Social and Economic Development (TOR)’ have become a key mechanism for reconciling the interests of the state and investors within the state policy to stimulate the economic development of the Russian Far East. However, significant proportion of projects remains unfulfilled. The state almost always receives less budgetary efficiency than initially planned. The article proposes a model of the coordination of the interests between the investor and the state based on preliminary financial modeling of projects. The interaction between the investor and the state was studied in terms of Game theory. For discrete modeling on the side of the investor it is proposed to use an approach based on Bayes’ theorem. For a one-time assessment of the economic benefits of the project, applied by the state, the technology for evaluation of option’s premium based on the Black-Scholes theorem can be used. For each potential resident of the TOR or SPV, the calculations must be made individually, but the proposed model allows us to draw several general conclusions, which can be applied as we aim to grow the cooperation between investors and the government while using the administrative and tax regimes in consideration. It is recommended to regulate the amount of infrastructure support for projects depending on their expected budgetary efficiency. The development of the government’s strategy of differentiated support for residents of TOR or SPV can change the balance of risks and benefits for potential investors and attract significant amount of foreign direct investment into the economy of the Pacific Russia. For potential TOR residents, the proposed methodology will be useful as a tool to substantiate their claims for state support, which will allow ‘real’ projects to avoid competition for land or electricity with ‘fictitious’ ones

Sign in / Sign up

Export Citation Format

Share Document