Secondary multiphase inclusions were studied in olivine from olivine-pyrochlore varieties of calcite carbonatites of the Belaya Zima alkaline complex, Eastern Sayan, Siberia, Russia. The inclusions ...form trails cross-cutting the host olivine. Their composition varies from carbonate to silicate-carbonate species. Multiphase silicate-carbonate inclusions contain Na-Ca-carbonates (shortite, nyerereite), Na-Mg-carbonates (northupite, eitelite, bradleyite), common carbonates (calcite, dolomite), Ba-Sr-rich carbonates (olekminskite, burbankite, strontianite), tetraferriphlogopite, magnetite, humite-clinohumite and other mineral phases. Na-Ca-carbonates, tetraferriphlogopite, humiteclinohumite and magnetite are omnipresent and dominant phases within the inclusions. The phase composition of secondary olivinehosted inclusions seems to reflect evolutionary features for the Belaya Zima carbonatites at their late stages of formation. During crystallization calciocarbonatite melt gradually evolved toward enrichment in alkalis (mainly, in sodium) and volatile components (Cl, F and H
2
O).
L’analyse du régime alimentaire par examen de pelotes de réjection au niveau d’une colonie de la Sterne hansel, Gelochelidon nilotica, nichant à Sebkha Zima, centre-ouest du Maroc, a montré un ...spectre alimentaire réduit chez cette espèce. Son régime alimentaire est caractérisé par la prédominance des proies des régions environnantes du site de nidification. Les invertébrés terrestres : Orthoptères (Acrididés), Coléoptères (Scarabéidés et Lucanidés), des Scorpionidés et les lézards acanthodactyles constituent les proies principales. En revanche, les invertébrés aquatiques Artemiidea et Dytiscidés constituent des proies secondaires.
Analysis of pellets from a colony of Gull-billed Terns, Gelochelidon nilotica, nesting in Sebkha Zima, West-central Morocco, revealed a reduced food spectrum in this species. Its diet is predominantly made of preys from areas around the nesting site. Terrestrial invertebrates ; Orthoptera (Acrididae), Coleoptera (Scarabeidae and Lucanidae), Scorpionidae along with Acanthodactylus lizards were the major prey items. Aquatic invertebrates rather secondary prey categories.
Provider: - Institution: Grodzka Gate – NN Theatre - Data provided by Europeana Collections- Relacja mówiona zarejestrowana w ramach Programu Historia Mówiona realizowanego w Ośrodku "Brama Grodzka - ...Teatr NN" (www.historiamowiona.teatrnn.pl). Wyraża ona wyłącznie subiektywne wspomnienia i poglądy świadka historii, które nie mogą być utożsamiane z oficjalnym stanowiskiem Ośrodka.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
The Paleoproterozoic sedimentary and volcanic-sedimentary sequences of the Urik-Iya Graben at southern flank of the Siberian Craton have been studied. Based on the isotopic U-Pb LA-ICP-MS dating of ...detrital zircons contained in the clastic fraction of the studied rocks, three main extension stages accompanied by sedimentation are recognized; each stage is characterized by certain types of sediments and conditions of their accumulation. The oldest rocks (Ingashi Formation) mark early extension events (∼1.91−1.87 Ga), which were caused by collapse of the orogen that arose due to collision of the Biryusa and Sharyzhalgai blocks. The basin formed as a result of extension is regarded as an aulacogen. Granitoids of the Sayan Complex were emplaced in the cratonic lithosphere at the final stage of the first extension stage. The second stage of extension started ∼1.75 Ga ago as a response to the effect of the inferred mantle plume on the lithosphere of the Siberian Craton. It was accompanied by deposition of the Daldarma Formation. Stress inversion took place at the final stage (∼1.70 Ga), and an intracratonic fold zone arose at the place of the paleoaulacogen. The third extension stage (1.65−1.60 Ga) corresponds to the time of molasse accumulation in pull-apart basins (Yermosokha Formation). The final stage of rifting was marked by emplacement of granitoids (Chernaya Zima Complex, 1.53 Ga), which completed the active tectonic events in the region. Afterward, the Urik-Iya Graben transformed into a stable intracratonic domain. The available data allow us to revise the tectonic history of the Urik-Iya Graben. In light of new evidence, this structural unit may be interpreted as a long-evolving paleoaulacogen. The series of revealed sedimentation settings reflects the formation of a consolidated continental lithosphere at the southern flank of the Siberian Craton.
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Życie wraca do normy po ostrej zimie. Ulice są już przejezdne.- Extended description:- Information:- Life ...returns to normal after severe winter. The streets are now passable.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
In spite of the active investigation of melt inclusions in minerals from rocks of the alkaline carbonatite complexes over the last decade, there are still some data including the quantitative ...characteristics of the chemical composition of melts for carbonatites, as well as on other associated non silicate rocks. Andreeva reports the results of the study of the melt and crystalline inclusions coexisting in minerals of ore bearing forsteritecalcite carbonatite from the Belaya Zima massif (East Sayan).
Provider: - Institution: Grodzka Gate – NN Theatre - Data provided by Europeana Collections- Relacja mówiona zarejestrowana w ramach Programu Historia Mówiona realizowanego w Ośrodku "Brama Grodzka - ...Teatr NN" (www.historiamowiona.teatrnn.pl). Wyraża ona wyłącznie subiektywne wspomnienia i poglądy świadka historii, które nie mogą być utożsamiane z oficjalnym stanowiskiem Ośrodka.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- - All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain ...Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- - All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain ...Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- - All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain ...Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
