Analysis of Thermal Pollution of Volga–Uralian Steppe Landscapes Caused by Exploitation of Oil Deposits     

Myachina  K. V.  Chibilev  A. A. 《Doklady Earth Sciences》2020,492(1):366-369

Doklady Earth Sciences - Flares for combustion of associated petroleum gas (APG) are the main sources of thermal impact on landscapes during the exploitation of oil deposits. The object of this...  相似文献   

Phase Shift between Changes in Global Temperature and Atmospheric CO2 Content under External Emissions of Greenhouse Gases into the Atmosphere     

Muryshev  K. E.  Eliseev  A. V.  Denisov  S. N.  Mokhov  I. I.  Arzhanov  M. M.  Timazhev  A. V. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(3):235-241

Izvestiya, Atmospheric and Oceanic Physics - The phase shift between changes in the global surface temperature Tg and atmospheric CO2 content $${{q}_{{{\text{C}}{{{\text{O}}}_{2}}}}}$$ has been...  相似文献   

Energy of the Jets of the Antarctic Circumpolar Current and of Their Eddies in the Surface Layer of the Southern Ocean     

Koshlyakov  M. N.  Savchenko  D. S.  Tarakanov  R. Yu. 《Oceanology》2019,59(3):293-304

Oceanology - The kinetic energy of six jets of the Antarctic Circumpolar Current (ACC) and of the cyclonic and anticyclonic mesoscale eddies generated by these jets is studied in application to the...  相似文献   

Alteration,Chemical Processes,and Parent Rocks of Haléo-Danielle Plateau Bauxite,Adamawa–Cameroon     

Nyamsari  D. G.  Yalçin  M. G.  Wolfson  I. 《Lithology and Mineral Resources》2020,55(3):231-243

Lithology and Mineral Resources - The Haléo-Danielle Plateau bauxite deposit forms the largest part of the 15 km long Minim-Martap Bauxite ore district in the Adamawa Region of Cameroon. The...  相似文献   

Chemical Composition,U–Th–Pb Age,and Geodynamic Setting of Metavolcanic Filla Series (Rauer Islands,East Antarctica)     

Mikhalsky  E. V.  Alexeev  N. L.  Kamenev  I. A.  Larionov  A. N.  Gogolev  M. A.  Svetov  S. A.  Kunakkuzin  E. L. 《Geotectonics》2020,54(3):285-307

Geotectonics - An assemblage of mafic granulites (schists), plagiogneisses, and metasedimentary rocks, which is referred to as the Filla Series, is exposed in the Rauer Islands (opposite the...  相似文献   

Soil resistances for laterally loaded rigid piles in multi-layered elastic soil     

Bipin K. Gupta 《Geomechanics and Geoengineering》2020,15(1):10-28

ABSTRACT

Short stubby piles like monopiles and large diameter drilled shafts undergo rigid body translation and rotation when subjected to a lateral force and/or a moment at the head. A method of analysis for these piles embedded in multi-layered elastic soil is developed using the variational principles of mechanics. Using this analysis, the soil resistance against pile movement can be rigorously related to the soil elastic constants, and the pile head displacement and rotation can be quickly calculated. The equilibrium equations for pile and soil displacements are obtained using the principle of virtual work and solved using an iterative algorithm. Pile responses obtained from the analysis match well with those obtained from three-dimensional finite element analyses in which the same inputs of loads, geometry, and material properties are given. Based on the new analysis, fitted equations for soil resistance parameters are developed, which can be used to directly calculate the pile head displacement and rotation without the use of the iterative algorithm. Numerical examples are provided that demonstrate how the method can be used to analyse practical problems.  相似文献   

Identification of Induced Seismicity in the Fault Zone of the Korobkovskoye Deposits (Kursk Magnetic Anomaly) Based on Observations of a Small-Aperture Seismic Array     

Adushkin  V. V.  Varypaev  A. V.  Kushnir  A. F.  Sanina  I. A. 《Doklady Earth Sciences》2020,493(1):548-551

Doklady Earth Sciences - The results of recording and determining the locations of seismic events triggered by industrial explosions conducted by OJSC Kombinat KMAruda at the Korobkovskoe iron ore...  相似文献   

Laser-Induced Dissociation of the Monolayer of Adsorbed Methanol Molecules     

Varakin  V. N.  Murga  M. S. 《Astronomy Reports》2020,64(4):319-325

Astronomy Reports - Astronomical observations indicate a high abundance of methanol molecules in the gas phase of molecular-cloud dense cores, which cannot be explained by gas-phase chemical...  相似文献   

Maximum Entropy and Random Forest Modeling of Mineral Potential: Analysis of Gold Prospectivity in the Hezuo–Meiwu District,West Qinling Orogen,China     

Zhang  Shuai  Xiao  Keyan  Carranza  Emmanuel John M.  Yang  Fan 《Natural Resources Research》2019,28(3):645-664

Natural Resources Research - This study tested and compared the mineral potential mapping capabilities of the random forest (RF) and maximum entropy (MaxEnt) algorithms using gold deposit...  相似文献   

Hyperspectral imaging of drill core from the Steen River impact structure,Canada: Implications for hydrothermal activity and formation of suevite‐like breccias     

E. A. MacLagan  E. L. Walton  C. D. K. Herd  B. Rivard 《Meteoritics & planetary science》2020,55(7):1564-1580

Hyperspectral imaging can be used to rapidly identify and map the spatial distributions of many minerals. Here, hyperspectral mapping in three wavelength regions (visible and near‐infrared, shortwave infrared, and thermal infrared) was applied to drill cores (ST001, ST002, and ST003) penetrating a continuous sequence of crater‐fill breccias from the Steen River impact structure in Alberta, Canada. The combined data sets reveal distinct mineralogical layering, with breccias derived predominantly from sedimentary rocks overlying those derived from granitic basement. This stratigraphy demonstrates that the breccias were not appreciably disturbed following deposition, which is inconsistent with formation models of similar breccias (suevites) by explosive impact melt–fluid interaction. At Steen River, volatiles from sedimentary target rocks were an inherent part of forming these enigmatic breccias. Approximately three quarters of terrestrial impact structures contain sedimentary target rocks; therefore, the role of volatiles in producing so‐called suevitic breccias may be more widespread than previously realized. The hyperspectral maps, specifically within the SWIR wavelength region, also delineate minerals associated with postimpact hydrothermal activity, including ammoniated clay and feldspar minerals not detectable using traditional techniques. These nitrogen‐bearing minerals may have originated from microbial processes, associated with oil‐ and gas‐producing units in the crater vicinity. Such minerals may have important implications for the production of habitable environments by impact‐induced hydrothermal activity on Earth and Mars.  相似文献