scholarly journals Izanagi-Pacific ridge subduction revealed by a 56 to 46 Ma magmatic gap along the northeast Asian margin

Geology ◽  
2019 ◽  
Vol 47 (10) ◽  
pp. 953-957 ◽  
Author(s):  
Jeremy Tsung-Jui Wu ◽  
Jonny Wu
Keyword(s):  
Continental Margin ◽  
Spatial Configuration ◽  
Russian Far East ◽  
Far East ◽  
Late Eocene ◽  
Spreading Ridge ◽  
Geological Evidence ◽  
Ridge Subduction ◽  
Northeast Asian ◽  
Early Cenozoic

Abstract Recent studies have debated the timing and spatial configuration of a possible intersection between the Pacific-Izanagi spreading ridge and the northeast Asian continental margin during Cretaceous or early Cenozoic times. Here we examine a newly compiled magmatic catalog of ∼900 published Cretaceous to Miocene igneous rock radioisotopic values and ages from the northeast Asian margin for ridge subduction evidence. Our synthesis reveals that a near-synchronous 56–46 Ma magmatic gap occurred across ∼1500 km of the Eurasian continental margin between Japan and Sikhote-Alin, Russian Far East. The magmatic gap separated two distinct phases of igneous activity: (1) an older, Cretaceous to Paleocene pre–56 Ma episode that had relatively lower εNd(t) (−15 to + 2), elevated (87Sr/86Sr)0 (initial ratio, 0.704–0.714), and relatively higher magmatic fluxes (∼1090 km2/m.y.); and (2) a younger, late Eocene to Miocene post–46 Ma phase that had relatively elevated εNd(t) (−2 to + 10), lower (87Sr/86Sr)0 (0.702–0.707), and a lower 390 km2/m.y. magmatic flux. The 56–46 Ma magmatic gap links other geological evidence across northeast Asia to constrain an early Cenozoic, low-angle ridge-trench intersection that had profound consequences for the Eurasian continental margin, and possibly led to the ca. 53–47 Ma Pacific plate reorganization.

Late Eocene granites in the Central Sakhalin Island (Russian Far East) and its implication for evolution of the Sakhalin-Hokkaido orogenic belt

Lithos ◽  
2019 ◽  
Vol 324-325 ◽  
pp. 684-698 ◽  
Author(s):  
Pan Zhao ◽  
Igor Alexandrov ◽  
Bor-ming Jahn ◽  
Jia-Ping Liao ◽  
Vitaly Ivin
Keyword(s):  
Russian Far East ◽  
Far East ◽  
Late Eocene ◽  
Sakhalin Island ◽  
Orogenic Belt

Paleocene origin of the cockroach families Blaberidae and Corydiidae: Evidence from Amur River region of Russia

Zootaxa ◽  
2013 ◽  
Vol 3635 (2) ◽  
pp. 117-126 ◽  
Author(s):  
PETER VRŠANSKÝ ◽  
ĽUBOMÍR VIDLIČKA ◽  
PETER BARNA ◽  
EUGENIA BUGDAEVA ◽  
VALENTINA MARKEVICH
Keyword(s):  
Coal Mine ◽  
Russian Far East ◽  
Far East ◽  
Amur River ◽  
River Region ◽  
The Family ◽  
The Amur River ◽  
Early Cenozoic ◽  
Amur River Region

Morphna paleo sp. n., the earliest winged representative of any living cockroach genus and the earliest representative of the family Blaberidae, is described from the Danian Arkhara-Boguchan coal mine in the Amur River region (Russian Far East). The branched Sc and A suggest Ectobiidae (=Blattellidae) probably is not the ancestral family because Blaberidae were derived directly from the extinct family Mesoblattindae. The associated Danian locality Belaya Gora yielded Ergaula stonebut sp. n., the earliest record of the family Corydiidae. Both species belong to genera codominant in the Messel locality, thus validating their dominance in early Cenozoic assemblages.

scholarly journals Northeast Asian Regional Economic Security: Fishery Cooperation between Russia and South Korea

2005 ◽  
Vol 20 (1) ◽  
pp. 1-33
Author(s):  
Se Hyun Ahn
Keyword(s):  
South Korea ◽  
Russian Far East ◽  
Far East ◽  
Economic Security ◽  
Regional Security ◽  
Diplomatic Relations ◽  
South Korean ◽  
Bright Spots ◽  
Marine Products ◽  
Northeast Asian

This article reviews fishery cooperation between Russia and South Korea from a regional security perspective. Even though the South Korean fishery industry has long played a role in agriculture as a national food industry, the Korean inshore fishery production amount has been steadily decreasing, primarily because of the new Korea-Japan fishery and the Korea-China fishery agreement in the last decade. In this regard, the Russian Far East provides a solution to South Korean fish markets because of its vast and rich marine products and fishery resources. Since the establishment of diplomatic relations in 1990 and a fishery agreement in 1991, South Korea has fished in the Russian waters according to fishery quotas based on a mutual fishery pact. This relatively small but flourishing fishery trade is one of the few bright spots in the currently relatively stagnant Russo-South Korean diplomatic relations.

scholarly journals Translithospheric Mantle Diapirism: Geological Evidence and Numerical Modelling of the Kondyor Zoned Ultramafic Complex (Russian Far-East)

2009 ◽  
Vol 50 (2) ◽  
pp. 289-321 ◽  
Author(s):  
J.-P. Burg ◽  
J.-L. Bodinier ◽  
T. Gerya ◽  
R.-M. Bedini ◽  
F. Boudier ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Russian Far East ◽  
Far East ◽  
Geological Evidence ◽  
Ultramafic Complex ◽  
Mantle Diapirism

scholarly journals Moscow’s “turn to the East” and challenges to Russia–South Korea economic collaboration under the New Northern Policy

2019 ◽  
Vol 10 (2) ◽  
pp. 159-168 ◽  
Author(s):  
Anthony V. Rinna
Keyword(s):  
South Korea ◽  
Korean Peninsula ◽  
Russian Far East ◽  
Far East ◽  
Economic Benefits ◽  
South Korean ◽  
Economic Collaboration ◽  
The Republic ◽  
Northeast Asian ◽  
Northern Policy

The Republic of Korea (ROK) has not traditionally regarded the Russian Federation as an important partner in the Korean security crisis. Nevertheless, the ROK–Russia relationship has grown by leaps and bounds. Furthermore, the Moon Jae-in administration’s “New Northern Policy,” which focuses especially on economic collaboration with Russia, exhibits a great deal of compatibility with the “turn to the East” in the Russian Federation’s recent foreign and domestic policies. For Seoul, the “New Northern Policy” is not simply a means of generating economic benefits for the ROK but is also part of Seoul’s plans for promoting peace on the Korean Peninsula. Indeed, the Kremlin shares with South Korea not only the goal of increased economic interconnectivity but also a lasting peace on the Korean Peninsula. Nevertheless, two main barriers exist undermining aims outlined in the New Northern Policy. The continuation of the crisis over North Korea’s weapons of mass destruction (WMD) capabilities, particularly the perpetuation of the various layers of sanctions against Pyongyang, frustrate the economic integration as espoused in the New Northern Policy. Furthermore, economic conditions within Russia, namely, a lack of economic development within the Russian Far East, frustrate South Korean hopes for greater trade connectivity with Russia. Substantial changes to both the Northeast Asian sub-regional order as well as in the Russian Federation’s domestic economic situation, therefore, are necessary before the prospects envisioned in Seoul’s New Northern Policy can be realized.

scholarly journals The Ants (Hymenoptera: Formicidae) of Bol’shaya Svetlovodnaya (Late Eocene of Sikhote-Alin, Russian Far East)

2015 ◽  
Vol 11 (1) ◽  
pp. 131-152 ◽  
Author(s):  
G.M. Dlussky ◽  
◽  
A.P. Rasnitsyn ◽  
K.S. Perfilieva ◽  
◽  
...  
Keyword(s):  
Russian Far East ◽  
Far East ◽  
Late Eocene ◽  
Sikhote Alin
Sign in / Sign up

Export Citation Format

Share Document