Geology and Development of the Lomonsov Diamond Deposit, Northwestern Russia

2017 ◽  
Vol 53 (2) ◽  
pp. 144-167 ◽  
Author(s):  
Karen V. Smith ◽  
Russell Shor
Keyword(s):  
Diamond Deposit ◽  
Northwestern Russia

Lamproites and kimberlites in China and the genesis of diamond deposit

1998 ◽  
Vol 41 (S1) ◽  
pp. 54-92 ◽  
Author(s):  
Houjun Mei ◽  
Chunjing Tang ◽  
Sunrong Li ◽  
Yongming Li ◽  
Xingchun Zhang ◽  
...  
Keyword(s):  
Diamond Deposit

Atmospheric transport and wet depositions of acidifying substances in northwestern Russia

2010 ◽  
Vol 35 (6) ◽  
pp. 394-400 ◽  
Author(s):  
A. G. Ryaboshapko ◽  
P. A. Bryukhanov ◽  
I. M. Bruskina
Keyword(s):  
Atmospheric Transport ◽  
Northwestern Russia

Limnophyes(Diptera: Chironomidae) from northwestern Russia

2007 ◽  
Vol 29 (1) ◽  
pp. 49-58 ◽  
Author(s):  
Andrey Przhiboro ◽  
Ole A. Sæther
Keyword(s):  
Northwestern Russia

COLLINSITE IN HYDROTHERMAL ASSEMBLAGES RELATED TO CARBONATITES IN THE KOVDOR COMPLEX, NORTHWESTERN RUSSIA

2001 ◽  
Vol 39 (4) ◽  
pp. 1081-1094 ◽  
Author(s):  
R. P. Liferovich ◽  
Y. A. Pakhomovsky ◽  
A. N. Bogdanova ◽  
E. G. Balaganskaya ◽  
K. V.O. Laajoki ◽  
...  
Keyword(s):  
Northwestern Russia

First humpback whale (Megaptera novaeangliae) re-sighting between Azorean waters and the Barents Sea (Murman coast, northwestern Russia)

Polar Biology ◽  
2022 ◽  
Author(s):  
Rui Peres dos Santos ◽  
Rafael Martins ◽  
Anton Chaiko ◽  
Ted Cheeseman ◽  
Lindsey S. Jones ◽  
...  
Keyword(s):  
Barents Sea ◽  
Humpback Whale ◽  
Megaptera Novaeangliae ◽  
The Barents Sea ◽  
Northwestern Russia

Role of forest fires in Holocene stand-scale dynamics in the unmanaged taiga forest of northwestern Russia

The Holocene ◽  
2014 ◽  
Vol 24 (11) ◽  
pp. 1503-1514 ◽  
Author(s):  
Niina Kuosmanen ◽  
Keyan Fang ◽  
Richard HW Bradshaw ◽  
Jennifer L Clear ◽  
Heikki Seppä
Keyword(s):  
Forest Fires ◽  
Siberian Larch ◽  
Wavelet Coherence ◽  
Individual Tree ◽  
Study Region ◽  
Taiga Forest ◽  
The Impact ◽  
Wavelet Coherence Analysis ◽  
Northwestern Russia

Fossil pollen, conifer stomata, and charcoal records for the last 10,000 years were studied from three small hollow sites (Larix Hollow, Mosquito Hollow, and Olga Hollow) located at the modern western range limit of Siberian larch ( Larix sibirica) in northwestern Russia to investigate the role of forest fires in stand-scale dynamics of taiga vegetation. Wavelet coherence analysis was utilized to reveal the significance of fire on the vegetation composition at different timescales by assessing the phase and strength of the relationship between forest fires and most common boreal tree taxa in a time–frequency window. Pollen and stomata data show that all of the modern-day common tree taxa, including Norway spruce ( Picea abies) and Siberian larch, have been present in the study region since the early Holocene. The absence of charcoal layers at Mosquito Hollow suggests that this site has acted as a fire-free refugium with continuous dominance of spruce throughout the Holocene. Meanwhile, the Larix Hollow record indicates frequent local fire events and as a consequence, a more variable tree species composition. The wavelet coherence results show that the impact of forest fires on vegetation varies from short-term (<200-year periods) changes in individual tree taxa to long-term (400–800 years) changes in forest composition, such as the expansion of spruce population after local high-intensity fires around 7500–7000 cal. yr BP and the increase in abundance of birch and alder during periods of high fire frequency. Our results suggest that Holocene fire histories can be markedly different within a small geographical area, demonstrating the importance of site-specific factors in the local fire regime in the unmanaged taiga forest.

scholarly journals New records and disappearance from old sites of narrow-clawed crayfish Pontastacus leptodactylus in northwestern Russia

2021 ◽  
Vol 10 (4) ◽  
pp. 894-903
Author(s):  
Nadezhda Berezina ◽  
Piotr Terentiev ◽  
Andrey Sharov ◽  
Alexey Maximov
Keyword(s):  
New Records ◽  
Northwestern Russia

scholarly journals Modeling Changes in the Composition of River Water with Discharged Wastewater: A Case Study in NW Russia

Water ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 165
Author(s):  
Alexander I. Malov ◽  
Evgeniya S. Sidkina ◽  
Mikhail V. Mironenko ◽  
Alexey S. Tyshov ◽  
Elena V. Cherkasova
Keyword(s):  
Surface Water ◽  
Chemical Elements ◽  
Conservation Status ◽  
Simplex Algorithm ◽  
Drainage Water ◽  
Discharge Zone ◽  
Mining Operations ◽  
Diamond Deposit ◽  
Further Development

The technogenic impact of the development of the Lomonosov diamond deposit is associated with the discharge of quarry and drainage water into the river, which has a special conservation status. Earlier studies on the composition of bottom sediments showed that there are signs of increased accumulation of heavy metals and radionuclides at wastewater discharge sites. The purpose of this work was to predict changes in the composition of surface water and bottom sediment in the river during the further development of mining operations with brackish and salty water captured by drainage systems, the presence of which was established in the zone of their future influence. For this, a simulation of changes in the composition of the water in the river was carried out using the GEOCHEQ software package by minimizing the free energy of the system using a convex simplex algorithm. It was found that the maximum salinity of surface water can reach 1.51 g/L. In this case, the MPC of Cl−, Na+, SO42−, Mg2+, Sr, V, and U can be exceeded for fishery watercourses. The genetic basis of the accumulation of these components in solutions for mixing was considered. According to the calculations, when about 5000 m3/h of drainage water is discharge d into the river, the mass of precipitated chemical elements will be 56–191 t/h, including up to 2.1 t/h of iron; therefore, accumulation in the discharge zone must be controlled.

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