Quantification of Hydrogen in Natural Diamond by Secondary Ion Mass Spectrometry (SIMS)     

Kaminsky  F. V.  Shilobreeva  S. N.  Ber  B. Ya.  Kazantsev  D. Yu. 《Doklady Earth Sciences》2020,494(1):699-703

Doklady Earth Sciences - The volumetric concentration of hydrogen in two Brazilian diamonds is determined using secondary ion mass spectrometry and implantation of hydrogen into an external...  相似文献   

Three-Dimensional Petrophysical Modelling and Volumetric Analysis to Model the Reservoir Potential of the Kupe Field,Taranaki Basin,New Zealand     

Qadri  S. M. Talha  Islam  Md. Aminul  Shalaby  Mohamed Ragab 《Natural Resources Research》2019,28(2):369-392

Natural Resources Research - This study addresses the three-dimensional (3D) petrophysical modelling and volumetric analysis of the Farewell Reservoir in the Kupe Field in the southern Taranaki...  相似文献   

Seismic‐stratigraphic constraints on the age of the Faroe Islands Basalt Group,Faroe–Shetland region,Northeast Atlantic Ocean     

Jana lavsdttir  Martyn S. Stoker  Lars O. Boldreel  Morten Sparre Andersen   luva R. Eidesgaard 《Basin Research》2019,31(5):841-865

Lower Palaeogene extrusive igneous rocks of the Faroe Islands Basalt Group (FIBG) dominate the Faroese continental margin, with flood basalts created at the time of breakup and separation from East Greenland extending eastwards into the Faroe‐Shetland Basin. This volcanic succession was emplaced in connection with the opening of the NE Atlantic; however, consensus on the age and duration of volcanism remains lacking. On the Faroe Islands, the FIBG comprises four main basaltic formations (the pre‐breakup Lopra and Beinisvørð formations, and the syn‐breakup Malinstindur and Enni formations) locally separated by thin intrabasaltic sedimentary and/or volcaniclastic units. Offshore, the distribution of these formations remains ambiguous. We examine the stratigraphic framework of these rocks on the Faroese continental margin combining onshore (published) outcrop information with offshore seismic‐reflection and well data. Our results indicate that on seismic‐reflection profiles, the FIBG can be informally divided into lower and upper seismic‐stratigraphic packages separated by the strongly reflective A‐horizon. The Lower FIBG comprises the Lopra and Beinisvørð formations; the upper FIBG includes the Malinstindur and Enni formations. The strongly reflecting A‐horizon is a consequence of the contrast in properties of the overlying Malinstindur and underlying Beinisvørð formations. Onshore, the A‐horizon is an erosional surface, locally cutting down into the Beinisvørð Formation; offshore, we have correlated the A‐horizon with the Flett unconformity, a highly incised, subaerial unconformity, within the juxtaposed and interbedded sedimentary fill of the Faroe‐Shetland Basin. We refer to this key regional boundary as the A‐horizon/Flett unconformity. The formation of this unconformity represents the transition from the pre‐breakup to the syn‐breakup phase of ocean margin development in the Faroe–Shetland region. We examine the wider implications of this correlation considering existing stratigraphic models for the FIBG, discussing potential sources of uncertainty in the correlation of the lower Palaeogene succession across the Faroe–Shetland region, and implications for the age and duration of the volcanism.  相似文献   

Aging in Activity Spaces: How Does Individual Accessibility Compare across Age Cohorts?     

Brittany S. Wood  Mark W. Horner 《The Professional geographer》2019,71(1):1-14

The proportion of individuals age sixty-five and over is growing at an astronomical rate in the United States, and some estimate that this demographic age group will double by the year 2025. Older adults and adults nearing retirement age tend to reside in suburban neighborhoods and rely heavily on personal vehicles. This study uses travel diary data on automobile trips to construct activity spaces to explore whether or not travel patterns across age groups result in differential access to particular goods and services in the Orlando Metropolitan Statistical Area (MSA). Using an approach based on time geographic density estimation, this research identifies activity spaces across different age cohorts to identify differences in the automobility of different age groups. Results indicate that the geographic dispersion of activities with the Orlando MSA currently favors younger adults. Adults age fifty to sixty-four had the lowest accessibility scores compared to other age cohorts. If this preretirement group has poor access now, holding other effects constant, their access might only get worse as they get older and stop commuting. Transportation is an important consideration in planning for aging populations, and analyzing differences in how older adults travel compared to their younger counterparts can offer insight into the diverse needs of this group. Key Words: accessibility, aging populations, mobility, time geography, transportation.  相似文献   

Comparison of Field and Satellite Data on the Total Cloudiness for the Atlantic Ocean in the Period 2004–2014     

Sinitsyn  A. V.  Gulev  S. K. 《Oceanology》2022,62(1):1-7

Oceanology - The aim of this study is to compare satellite measurements of the total cloudiness with visual observations of clouds. This makes it possible to compare “different...  相似文献   

Analysis of the Sky Scanning Efficiency in the Lyra-B Space Experiment     

S. V. Zhmailov  M. E. Prokhorov 《Astronomy Reports》2020,64(1):34-57

The Lyra-B space experiment (SE) is a high-precision multicolor multiple all-sky photometric survey of stars and star-like objects. The experiment will be conducted from the Russian segment of the International Space Station (ISS). For this purpose, a 0.5-m telescope will be installed onboard (or, more precisely, outboard) the ISS, which will observe stars in a scanning mode. The Lyra-B SE was included in the program of scientific experiments at the ISS fairly long ago. At the beginning of the SE design it was thought that the ISS would exist “eternally” and the time needed for the full-fledged implementation of the experiment would be allocated. Today, however, the situation has changed. In 2025 the ISS will possibly cease to exist either as the space station as a whole or in the form in which it exists now. Hence there arises the problem to perform the entire volume of observations in a maximally short time, i.e., to find an optimal sky scanning strategy that would ensure a maximum duration of observations. In addition, we consider two related questions: with what density will the observations be distributed over the sky and how many times will a point in the sky fallen within the field of view of the Lyra-B telescope be observed in successive orbital revolutions? This question is important for investigating variable stars, determining the orbits and axial rotation periods of asteroids, and ensuring a specified photometric accuracy over the entire sky.  相似文献   

准噶尔盆地玛湖凹陷西斜坡三叠系百口泉组扇三角洲优质储集层预测          下载免费PDF全文

桑林翔  刘军  王贵文  王苏天  李全  张云龙 《古地理学报》2020,22(6):1053-1064

针对准噶尔盆地玛湖凹陷西斜坡风南地区三叠系百口泉组扇三角洲砂岩物性空间变化大、优质储集层(孔隙度大于7.4%,渗透率大于0.05×10^-3μm²)预测难的问题,在沉积岩石学、地震沉积学以及地震反演和解释理论指导下,综合利用测井、岩心和三维地震等资料开展了高精度层序地层划分、沉积微相描述和优质储集层地震反演研究。建立了风南井区四级层序地层格架,明确了扇三角洲多期水进水退的充填过程,指出SSQ3和SSQ5是优质储集层的发育层系;识别出扇三角洲平原分流河道、河道间和扇三角洲前缘水下分流水道、河口坝、席状砂等沉积微相,指出扇三角洲平原是优质储集层发育相带;通过应用高分辨层序地层纵向边界和沉积相横向边界约束,进行分层相控叠后地震波阻抗反演,提升储集层预测精度,在SSQ3和SSQ5预测5个优质储集层发育区,提出3口井的井位建议,钻探均获工业油流。  相似文献   

Crystal Structure of Yushkinite [(Mg0.60Al0.30V0.10)Σ1.0(OH)2][V0.875S2]: An Example of a Commensurate Combination of Brucite and Sulfide Layers     

Soboleva  S. V.  Evstigneeva  T. E.  Boeva  N. M.  Bortnikov  N. S. 《Doklady Earth Sciences》2020,491(2):210-213

Doklady Earth Sciences - A structural model of the rare mineral yushkinite [(Mg0.60Al0.30V0.10)Σ1.0(OH)2] [V0.875S2] is studied using the data of electron microdiffraction and the X-ray powder...  相似文献   

Search for Atmospheric Wave Signatures by Simultaneous Collocated Barometer and Gravimeter Measurements     

Shved  G. M.  Novikov  S. S.  Gavrilov  N. M. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(1):43-51

Izvestiya, Atmospheric and Oceanic Physics - A spatial distribution model for air density perturbations during the propagation of internal gravity waves (IGWs) is used to derive estimates for...  相似文献   

Research Results on Ecological Hazard Objects in Abrosimov Bay (Novaya Zemlya,Kara Sea)     

Rimsky-Korsakov  N. A.  Flint  M. V.  Kazennov  A. Yu.  Anisimov  I. M.  Poyarkov  S. G.  Pronin  A. A.  Tronza  S. N. 《Oceanology》2020,60(5):625-632

Oceanology - The article presents results of field research on environmental assessment in Abrosimov Bay (Yuzhny Island of Novaya Zemlya) in connection with the existing RW disposal sites in this...  相似文献