scholarly journals The Middle-Upper Devonian Sandstones of the West Magnitogorsk Zone of the Southern Urals

Author(s):  
A.M. Fazliakhmetov ◽  
Author(s):  
Nikita Savelev ◽  

The article presents an analysis of the burial rite and chronology of the Gumarovo cemetery, located on the border of the steppe and mountain-steppe zones of the Southern Urals, at the southern tip of the almost completely forested low plateau Zilair (Russia, Orenburg oblast, right bank of the Sakmara River). The cemetery consists of 5 stone kurgans, explored in 1979–1980 by an expedition led by R.B. Ismagilov. A burial of Early Scythian time was revealed in one of the kurgans (the so-called “Bolshoy Gumarovskiy”, “Big Gumarovo”), and immediately became widely known among researchers. The cemetery itself belongs to a later time, also known as “Sauromatian” time. Based on the chronological indicators and simultaneous occurrence of accompanying inventory categories, it is determined that the cemetery dates back to the end of the 5th – beginning of the 4th centuries BC and existed for a very short time. The burial rite features of the Gumarovo kurgans (stone mounds, wide oval graves, sloping walls, circular chamber graves, heads of the deceased oriented to the west and the east) indicate that it belongs to a special “Mugodzharian” group of nomads from the Southern Urals steppes eastern part. The origin of this group of nomads is associated with the migration of the Northern and Central Kazakhstan nomads to the steppes of the Orsk-Ilek interfluve, i.e. to the west of the Mugodzhar ridge; with their long-lasting interaction with the local population of the Sauromatian (proved by Blumenfeld and East Aral complexes) and Early Sarmatian time; as well as assimilating part of the Early Saka appearance population, which occupied the steppes of the Southern Trans-Urals in the 7th – 6th centuries BC. It is shown that it is the “Mugodzharian” features that make the kurgans in the eastern part of the Southern Urals steppes significantly specific.


LITOSFERA ◽  
2019 ◽  
pp. 250-268
Author(s):  
A. V. Maslov ◽  
O. V. Artyushkova ◽  
R. Ch. Tagarieva ◽  
D. V. Kiseleva ◽  
M. V. Streletskaya ◽  
...  

Research subject. This article presents the results of a study undertaken to investigate the systematics of rare-earth elements (REE), Y, Th, U and Mn in the Upper Devonian conodonts of the Western Ural region of the foreland fold of the Southern Urals (Askyn and Makarovo horizons, Kukkarauk, Ryauzyak and Lemezinsky sections).Methods. The conodonts were isolated from carbonate rocks using the conventional method of their dissolution in organic acids, mainly formic acid. Sample preparation and mass spectrometric analysis were carried out in the class 1000 and 10 000 cleanroom facilities of the Zavaritsky Institute of Geology and Geochemistry. A PerkinElmer ELAN 9000 quadrupole ICP mass-spectrometer was used to determine the concentration of the trace elements under study. Sm and Nd isotope ratios were measured from a 3% nitric acid solution by a Thermo Fischer Neptune Plus multicollector inductively coupled plasma mass-spectrometer. The long-term reproducibility and accuracy of the measurement procedure were evaluated using a standard Merck Nd solution based on the NIST Nd2O3 and yielded 143Nd/144Nd = 0.511720 ± 15 (1 SD, n = 40).Results. The established features of PAAS-normalised lanthanide distributions in the conodont bulk samples (10.4–21.8 mg), Ce-anomalies, high REE values (173–1211 ppm) and a number of other parameters indicate the leading role of late diagenetic processes in the formation of conodont REE systematics. This is also evidenced by the Y/Ho values (≈26–32) specific for the studied conodont samples.Conclusions. In general, the distribution of lanthanides in the conodonts suggests that this process was mainly controlled by a lithogenic (from 90 to more than 99%) REE source. The εNd (t) (–4.0…–2.8) values characteristic of the cono donts of the Askyn and Makarovo horizons suggest that their Nd isotopic composition was either formed under the influence of the open ocean (island arc basin), characterised by a significant share of radiogenic Nd, or due to the entry of radiogenic waters of the ocean into the shelf zone at the peak of the marine transgression that took place in the region under consideration in the Famennian. 


2012 ◽  
Vol 18 (1) ◽  
pp. 29-50
Author(s):  
Sergeï Gutsalov

Abstract This article publishes interesting burials of ancient nomads dating from the end of the 3rd, 2nd or 1st centuries BC from the Dongulyuk II and Volodarka I tumuli necropoleis in the West of Kazakhstan. Materials from these funerary sites include some quite rare finds: phalerae, belt plates bearing depictions of confronting winged dragons, two-handled infantry swords used by warriors on foot and other objects relating to the life of nomads. The funerary rite – including such elements as burials in pits with ledges or in catacombs, the laying out of horses’ skulls on ledges, the arrangement of the deceased with their heads pointing to the north or south – indicates that the cultural links of the nomads from the southern foothills of the Urals at the end of the 1st millennium BC were orientated towards Central Asia. If it is borne in mind that many objects among the accompanying grave goods can also be associated with the eastern half of the Eurasian steppes, then it would seem highly likely that the nomads had originally come from northern China, moving west and migrating into eastern Europe including the southern Urals.


Author(s):  
A. O. Khotylev ◽  
N. B. Devisheva ◽  
Al. V. Tevelev ◽  
V. M. Moseichuk

Within the Western slope of the Southern Urals, there are plenty of basite dyke complexes of Riphean to Vendian among Precambrian terrigenous-carbonate formations. In metamorphic formations of the Taratash complex (Archean to Early Proterozoic, the northern closure of the Bashkirian meganticlinorium) there was observed the andesitic dyke with isotopic age of 71±1 Ma (U-Pb SHRIMP II on zircons) and near Bakal two bodies of gabbroids with zircons of similar ages were found. These are the first evidence of possible Mezozoic magmatism in this region.


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