The Isotopic Composition of Carbon in the Organic Matter of Recent Lacustrine Sediments and Ancient Rocks of the West Siberia

1987 ◽  
Vol 23 (7) ◽  
pp. 252-255 ◽  
Author(s):  
V. N. Burkova ◽  
G. F. Bolshakov ◽  
E. A. Kurakolova ◽  
E. Ya. Matis ◽  
S. I. Golyshev ◽  
...  
Keyword(s):  
Organic Matter ◽  
Isotopic Composition ◽  
Lacustrine Sediments ◽  
West Siberia ◽  
The West

scholarly journals The Paleoclimate Significance of the δ13C Composition of Individual Hydrocarbon Compounds in the Maoming Oil Shales, China

2021 ◽  
Vol 9 ◽  
Author(s):  
Xinxing Cao ◽  
Zhiguang Song ◽  
Sibo Wang ◽  
Puliang Lyu
Keyword(s):  
Organic Matter ◽  
Isotopic Composition ◽  
Partial Pressure ◽  
Carbon Isotopic Composition ◽  
Lacustrine Sediments ◽  
Hydrocarbon Composition ◽  
Botryococcus Braunii ◽  
Higher Plant ◽  
Carbon Isotopic ◽  
Oil Shales

Maoming oil shales are typical low-altitude lacustrine sediments that were deposited during the late Paleogene. The hydrocarbon composition and compound-specific stable carbon isotopic composition (δ13C) of organic matter in the profile samples of the oil shales have been analyzed. The results show that algae and aquatic plants are major parent sources of the organic matter in the oil shales associated with a small portion of terrestrial higher plant input. The δ13C composition of the bulk organic matter and the n-alkanes varies greatly on the profile from −26.9 to −15.8‰ and −31.7 to −16.2‰, respectively. While a good positive correlation among the δ13C composition of individual n-alkanes implies that these n-alkanes were originated from the similar source input. The δ13C composition of n-alkanes on the profile displays a positive excursion trend from the bottom to the top, and this excursion was likely related to the general decreasing trend of the partial pressure of atmospheric CO2 (pCO2) during the late Paleogene. The δ13C composition of the C30-4-methyl steranes ranges from −11.9 to −6.3‰, which is suggestive of Dinoflagellates-related source input. Coincidently, the high abundance C33-botryococcanes were detected in the samples on the top section of the profile and display an extremely positive carbon isotopic composition of −4.5 to −8.4‰, suggesting that the lower partial pressure of atmospheric CO2 had triggered a bicarbonate consumption mechanism for Botryococcus braunii B. Therefore, the δ13C composition of n-alkanes and C33-botryococcanes and their profile variation suggest that a general declining process associated with fluctuation in the partial pressure of atmospheric CO2 is likely the major reason for the rapid climatic changes toward the end of the late Paleogene.

Changes in soil quality following humping/hollowing and flipping of pakihi soils on the West Coast, South Island New Zealand

2007 ◽  
pp. 265-270 ◽  
Author(s):  
S.M. Thomas ◽  
M.H.Beare C.D. Ford ◽  
V. Rietveld
Keyword(s):  
Organic Matter ◽  
Soil Quality ◽  
West Coast ◽  
Land Development ◽  
Hot Water ◽  
Limited Information ◽  
The West ◽  
Organic Matter Quality ◽  
Pasture Production ◽  
Soil C

Humping/hollowing and flipping are land development practices widely used on the West Coast to overcome waterlogging constraints to pasture production. However, there is very limited information about how the resulting "new" soils function and how their properties change over time following these extreme modifications. We hypothesised that soil quality will improve in response to organic matter inputs from plants and excreta, which will in turn increase nutrient availability. We tested this hypothesis by quantifying the soil organic matter and nutrient content of soils at different stages of development after modification. We observed improvements in soil quality with increasing time following soil modification under both land development practices. Total soil C and N values were very low following flipping, but over 8 years these values had increased nearly five-fold. Other indicators of organic matter quality such as hot water extractable C (HWC) and anaerobically mineralisable N (AMN) showed similar increases. With large capital applications of superphosphate fertiliser to flipped soils in the first year and regular applications of maintenance fertiliser, Olsen P levels also increased from values

New records of aphyllophoroid fungi (Basidiomycota) for the Khanty-Mansi Autonomous Area — Yugra (West Siberia)

2020 ◽  
Vol 54 (2) ◽  
pp. 387-396
Author(s):  
I. V. Stavishenko
Keyword(s):  
Animal Ecology ◽  
New Records ◽  
West Siberia ◽  
The West ◽  
First Time ◽  
Khanty Mansi Autonomous ◽  
Aphyllophoroid Fungi

The paper provides data on records of 29 species of aphyllophoroid fungi new for the the Khanty-Mansi Autonomous Area — Yugra. Among them 10 species (Amaurodon cyaneus, Amyloxenasma allantosporum, Asterostroma laxum, Byssoporia terrestris, Paullicorticium pearsonii, Pseudomerulius montanus, Sistotrema sernanderi, Skeletocutis alutacea, S. ochroalba, Tubulicrinis orientalis) are published for the first time for Siberia, and 3 species (Scytinostroma praestans, Tomentellopsis zygodesmoides, Tubulicrinis strangulatus) are new for the West Siberia. Data on their locations, habitats and substrates in region are indicated. The specimens are kept in the Museum of the Institute of Plant and Animal Ecology of the Ural Branch of the RAS (SVER).

THE BASIC TYPES OF SECONDARY CHANGES IN RESERVOIR ROCKS IN THE TERRITORY OF THE WEST SIBERIA PLATE

2015 ◽  
pp. 26-30
Author(s):  
A. V. Podnebesnykh ◽  
S. V. Kuznetsov ◽  
V. P. Ovchinnikov
Keyword(s):  
Oil Recovery ◽  
West Siberia ◽  
Recovery Factor ◽  
Change Processes ◽  
The West ◽  
Reservoir Rocks ◽  
Tectonically Active ◽  
Porosity And Permeability ◽  
Active Zones ◽  
Regional Character

On the example of the group of fields in the West Siberia North the basic types of secondary changes in reservoir rocks are reviewed. Some of the most common types of such changes in the West Siberian plate territory include the processes of zeolitization, carbonation and leaching. These processes have, as a rule, a regional character of distribution and are confined to the tectonically active zones of the earth's crust. Due to formation of different mineral paragenesises the secondary processes differently affect the reservoir rocks porosity and permeability: thus, zeolitization and carbonization promote to reducing the porosity and permeability and leaching improvement. All this, ultimately leads to a change of the oil recovery factor and hydrocarbons production levels. Study and taking into account of the reservoir rocks secondary change processes can considerably influence on placement of operating well stock and on planning of geological and technological actions.

Distribution of organic matter in rocks of the Bazhenov horizon ( West Siberia )

2018 ◽  
Vol 59 (3) ◽  
pp. 285-298 ◽  
Author(s):  
A.E. Kontorovich ◽  
E.V. Ponomareva ◽  
L.M. Burshtein ◽  
V.N. Glinskikh ◽  
N.S. Kim ◽  
...  
Keyword(s):  
Organic Matter ◽  
West Siberia ◽  
Bazhenov Horizon

Genetic diversity and differentiation of Siberian stone pine populations at the southern range margin in the West Siberia lowland area

2015 ◽  
Vol 5 (5) ◽  
pp. 449-459
Author(s):  
E. A. Petrova ◽  
S. N. Velisevich ◽  
M. M. Belokon ◽  
Yu. S. Belokon ◽  
D. V. Politov ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
West Siberia ◽  
Stone Pine ◽  
The West ◽  
Siberian Stone Pine ◽  
Range Margin ◽  
Siberian Stone ◽  
Lowland Area

scholarly journals Tracing nitrate sources using the isotopic composition of skeletal-bound organic matter from the calcareous green algae Halimeda

Coral Reefs ◽  
2018 ◽  
Vol 37 (4) ◽  
pp. 1003-1011
Author(s):  
Dirk V. Erler ◽  
Luke Nothdurft ◽  
Mardi McNeil ◽  
Charly A. Moras
Keyword(s):  
Organic Matter ◽  
Isotopic Composition ◽  
Green Algae ◽  
Nitrate Sources

Transformation of soil organic matter in microarthropod community from the northern taiga of west Siberia

2006 ◽  
Vol 33 (1) ◽  
pp. 81-86 ◽  
Author(s):  
V. G. Mordkovich ◽  
O. G. Berezina ◽  
I. I. Lyubechanskii ◽  
V. S. Andrievskii ◽  
I. I. Marchenko
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
West Siberia ◽  
Northern Taiga ◽  
Microarthropod Community
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