scholarly journals PALAEONTOLOGICAL (RADIOLARIAN) LATE JURASSIC AGE CONSTRAINT FOR THE STEPANAVAN OPHIOLITE (LESSER CAUCASUS, ARMENIA)

2018 ◽  
Vol 40 (1) ◽  
pp. 31 ◽  
Author(s):  
T. Danelian ◽  
G. Galoyan ◽  
Y. Rolland ◽  
M. Sosson
Keyword(s):  
Oceanic Crust ◽  
Late Jurassic ◽  
Sedimentary Cover ◽  
Suture Zone ◽  
The South ◽  
Geodynamic Evolution ◽  
Oceanic Ridge ◽  
Slow Spreading ◽  
Lesser Caucasus ◽  
First Time

Micropalaeontological age evidence for the sedimentary cover of ophiolites is important to understand the palaeogeographic and geodynamic evolution of Tethyan realms. The Stepanavan ophiolitic suite of Northern Armenia consists of peridotites, gabbros, plagiogranite and lavas with a radiolarite sedimentary cover. It is regarded as the northern extension of the Sevan Akera ophiolitic zone and may be considered as the eastern extension of the Izmir-Ankara suture zone. It represents the relics of a slow-spreading mid oceanic ridge that was active between Eurasia and the South-Armenian Block of Gondwanian origin. Radiolaria extracted from radiolarites of the Stepanavan ophiolite provide for the first time a Late Jurassic (late Kimmeridgian to early Tithonian) age constraint for this part of Tethyan oceanic crust preserved in Lesser Caucasus.

The newest structures of the Heraclion peninsula (South-Western Crimea)

2019 ◽  
pp. 8-16
Author(s):  
M. Yu. Promyslova ◽  
G. V. Bryantseva ◽  
L. I. Demina ◽  
N. I. Kosevich
Keyword(s):  
Oceanic Crust ◽  
Coastal Zone ◽  
Early Cretaceous ◽  
Late Jurassic ◽  
Fracture Zones ◽  
The South ◽  
South Eastern ◽  
Back Arc ◽  
Geomorphological Analysis

The article presents the results of the structural-geomorphological analysis of the Heraklion peninsula of the South-Western Crimea. The Western, Central and South-Eastern segments are distinguished, differing in density and direction of fracture zones, faults, the nature of the ravine-gulch net, and the structure of the coastal zone. It is shown that neotectonic movements in the upper structural floor are most intensively manifested over the Late Jurassic-Early Cretaceous collisional suture formed when the back-arc basin with the oceanic crust was closed.

scholarly journals THE ISLAND ARC FERROCORDIERITE-ALMANDINE PLAGIORHYOLITES OF THE MOUNT KASTEL, MOUNTAIN CRIMEA

2017 ◽  
pp. 15-21 ◽  
Author(s):  
E. M. Spiridonov
Keyword(s):  
Continental Crust ◽  
Late Jurassic ◽  
Crystalline Basement ◽  
Island Arc ◽  
Metamorphic Rocks ◽  
Moderate Pressure ◽  
The South ◽  
Tectonic Zone ◽  
First Time

Plagio rhyolites of the Pre-Late Jurassic dyke contain restitegamet (cribrate inter grow ths of almandinespessartine and quartz) and ferrocordierite. The garnets of such habit and composition and with such kind of zonality - the content of Mg increases and the content of Mn decreases from the center to the edges - are typical for ferriferous metapelites of amphibotite facies. Composition of the rocks, during palingenesis of which the melt of plagiorhyolites of the Mount Kastel formed, probably corresponded to the cordierite-almandine plagiogneisses. An assessment of the parameters of these metamorphic rocks forming according garnet and cordierite compositions is »550° С and 4 kbar, so they are metamorphic rocks of the amphibotite facies of moderate pressure. There is an assumption, that Mountain Crime a tectonic zone was possibly formed on the ancient crystalline basement, on the mature continental crust, possible continuation of the structures of Russian Plattorm to the south. Ferro cordierite - sekaninaite has been described in Crimea for the first time. A part of garnet and cordiertte was replaced by highly ferriferous chlorite (daphnite) and pumpellyite-(Fe), a part of biotite, titanomagnetite and ilmenite - by chlorite, epidote, pumpellyite-(Fe) and mineral with intermediate compotition between titantte and vuagnatite. The reby, plagio rhyoltes were subj ected by metamorphism of prehnite-pumpellyite facies.

Sphagnum mosses (Sphagnaceae, Bryophyta) of South Ossetia (Caucasus)

2017 ◽  
Vol 51 ◽  
pp. 232-241 ◽  
Author(s):  
G. Ya. Doroshina ◽  
E. Yu. Kuzmina ◽  
I. A. Nikolajev
Keyword(s):  
The South ◽  
The Caucasus ◽  
South Ossetia ◽  
Sphagnum Mosses ◽  
Botanical Institute ◽  
Ecological Conditions ◽  
Komarov Botanical Institute ◽  
The World ◽  
First Time

Information on the Sphagnum mosses of the South Ossetia is generalized, the resulted list is presented. Nine species of Sphagnum are included in the list, whereabouts data and references to the publications are given, and the presence of a sample in the Herbarium of the Komarov Botanical Institute RAS (LE) is noted. The species Sphagnum platyphyllum (Lindb. ex Braithw.) Warnst. rarely occurring in the Caucasus is reported in the South Ossetia for the first time. The species was found in the Caucasus, South Ossetia, at the side of the Ertso Lake (42°28ʹN, 43°45ʹE), 1720 m a. s. l., among sedge thickets at the margin of the overgrowing lake. The peculiarities of its occurrence and ecological conditions are considered. Its distribution in the Caucasus and in the world is discussed.

The first data on the lichen flora of Dagestan beech forests

2013 ◽  
Vol 47 ◽  
pp. 215-221 ◽  
Author(s):  
A. B. Ismailov ◽  
G. P. Urbanavichus
Keyword(s):  
Lichen Species ◽  
The South ◽  
Beech Forests ◽  
Saprotrophic Fungi ◽  
South Eastern ◽  
Caucasus Mountains ◽  
First Time ◽  
Lichen Flora

49 lichen species and 2 species of non-lichenized saprotrophic fungi are recorded for the first time in beech forests of the south-eastern part of piedmont Dagestan. Among them, 34 species and 9 genera are new to Dagestan Republic, and 2 species, Diplotomma pharcidium (Ach.) M. Choisy and Rinodina albana (A. Massal.) A. Massal., are new to Caucasus Mountains.

First record of Agramma atricapillum (Heteroptera: Tingidae) from the Asian part of Russia

2020 ◽  
Vol 29 (1) ◽  
pp. 75-76
Author(s):  
V.B. Golub ◽  
E.V. Sergeeva
Keyword(s):  
First Record ◽  
The South ◽  
First Time

The lacebug species Agramma atricapillum (Spinola, 1837) (Heteroptera: Tingidae) is recorded in the Asian part of Russia, namely in the south of the Tyumen’ Province, for the first time.

Extremely asymmetric magmatic accretion of oceanic crust at the ends of slow-spreading ridge segments

Geology ◽  
2000 ◽  
Vol 28 (2) ◽  
pp. 179-182 ◽  
Author(s):  
Simon Allerton ◽  
Javier Escartín ◽  
Roger C. Searle
Keyword(s):  
Oceanic Crust ◽  
Spreading Ridge ◽  
Slow Spreading

Darwin wasps of the subfamily Pimplinae (Hymenoptera: Ichneumonidae) of Mexico: genera Apechthis Förster, Itoplectis Förster and Pimpla Fabricius

Zootaxa ◽  
2021 ◽  
Vol 5071 (4) ◽  
pp. 451-491
Author(s):  
ANDREY I. KHALAIM ◽  
ENRIQUE RUÍZ-CANCINO
Keyword(s):  
Junior Synonym ◽  
South American ◽  
The South ◽  
South American Species ◽  
Identification Keys ◽  
First Time ◽  
Mexican Species

Mexican species of three pimpline genera, Apechthis Förster (one  species), Itoplectis Förster (six species) and Pimpla Fabricius (20 species, including one unidentified taxon), are reviewed. Four species of Pimpla are described as new to science: P. chamela sp. nov., P. oaxacana sp. nov., P. tequila sp. nov. and P. xalapana sp. nov. Pimpla thoracica Morley, 1914 is found to be a junior synonym of P. ellopiae Harrington, 1892 (syn. nov.). Apechthis zapoteca (Cresson) is recorded for the first time from Venezuela, Pimpla dimidiata (Townes) from Mexico, P. caeruleata Cresson, P. croceiventris (Cresson), P. sanguinipes Cresson and P. sumichrasti Cresson from Honduras, P. ichneumoniformis Cresson and P. viridescens Morley from Guatemala and Honduras, and P. punicipes Cresson from Panama. The South American species Pimpla caerulea Brullé and the Nearctic species P. pedalis Cresson are excluded from the Mexican fauna. Male of Itoplectis mexicana and female of Pimpla dimidiata are recorded for the first time. Identification keys to the species of Itoplectis and Pimpla occurring in Mexico are provided.  

Political Change in Rhodesia: The South Africa Factor

1975 ◽  
Vol 5 (4) ◽  
pp. 13-20
Author(s):  
Philip E. Chartrand
Keyword(s):  
South Africa ◽  
United Nations ◽  
Majority Rule ◽  
Political Change ◽  
The South ◽  
The United Nations ◽  
Liberation Movements ◽  
Minority Regime ◽  
Near Future ◽  
First Time

In December 1974, Ian Smith, the leader of the white minority regime in Rhodesia, announced for the first time since declaring his country’s independence from Britain in 1965 that his government was willing to begin direct negotiations with the African liberation movements seeking to achieve majority rule in Rhodesia. The prospect of such talks leading to an end to guerrilla fighting in Rhodesia and a termination of the United Nations authorized sanctions against the illegal Smith regime is dimmed by the fact that the Africans demand African rule for Rhodesia in the near future if not immediately, while Smith and his supporters have refused to consider such a development “in his lifetime.” Still the announcement constituted a step forward which few informed observers would have deemed likely even a few weeks before.

Geologic-geochemical and modelling studies of hydrocarbon migration in the South Caspian basin

2020 ◽  
pp. 4-15
Author(s):  
M.F. Tagiyev ◽  
◽  
I.N. Askerov ◽  
◽  
◽  
...  
Keyword(s):  
Sedimentary Cover ◽  
Geochemical Data ◽  
Caspian Basin ◽  
Hydrocarbon Generation ◽  
The South ◽  
South Caspian Basin ◽  
Hydrocarbon Migration ◽  
Upward Migration ◽  
Modelling Studies ◽  
Hydrocarbon Charge

Based on pyrolysis data an overview is given on the generative potential and maturity of individual stratigraphic units in the South Caspian sedimentary cover. Furthermore, the pyrolysis analyses indicate that the Lower Pliocene Productive Series being immature itself is likely to have received hydrocarbon charge from the underlying older strata. The present state of the art in studying hydrocarbon migration and the "source-accumulation" type relationship between source sediments and reservoired oils in the South Caspian basin are touched upon. The views of and geochemical arguments by different authors for charging the Lower Pliocene Productive Series reservoirs with hydrocarbons from the underlying Oligocene-Miocene source layers are presented. Quantitative aspects of hydrocarbon generation, fluid dynamics, and formation of anomalous temperature & pressure fields based on the results of basin modelling in Azerbaijan are considered. Based on geochemical data analysis and modelling studies, as well as honouring reports by other workers the importance and necessity of upward migration for hydrocarbon transfer from deep generation centers to reservoirs of the Productive Series are shown.

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