Russian Journal of Pacific Geology最新文献_第5页

Oil and Gas Potential of the West Kamchatka Coast and Its Relation to the Structural and Tectonic Setting of the Sea of Okhotsk Region Based on Geophysical Data 基于地球物理数据的西堪察加半岛沿岸的石油和天然气潜力及其与鄂霍次克海地区结构和构造背景的关系

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI: 10.1134/s1819714023080067

D. F. Kalinin, A. S. Egorov, N. V. Bolshakova

{"title":"Oil and Gas Potential of the West Kamchatka Coast and Its Relation to the Structural and Tectonic Setting of the Sea of Okhotsk Region Based on Geophysical Data","authors":"D. F. Kalinin, A. S. Egorov, N. V. Bolshakova","doi":"10.1134/s1819714023080067","DOIUrl":"https://doi.org/10.1134/s1819714023080067","url":null,"abstract":"<p>This article describes the peculiarities of the deep-seated structure of sedimentary depressions in the West Kamchatka coastal zone and in adjacent Sea of Okhotsk offshore areas, which are manifested in the observed potential fields and in their transforms. To reveal geophysical regularities reflecting the old structure of the deepest part of the crystalline basement within the analyzed objects, a pseudo-gravity field calculated on the basis of analytical approximation was used. Regional and local components of the decomposition of the observed potential fields calculated by 2D adaptive energy filtering and presumably associated with different-depth structural-tectonic objects were analyzed. Based on comparison of the investigated Pustoretsky Trough with the “reference” Kolpakovsky Trough, which includes known gas-condensate fields (West Kamchatka Oil and Gas Region), conclusions were made about the similarity of their formation conditions and subsequent evolution. A regional geophysical model of the Pustoretsky Trough was compiled, which made it possible to reasonably assume its formation in the zone of Cenozoic subduction processes caused by the interaction of lithospheric plates. This model is thought to be associated with possible presence of oil and gas prospective structures.</p>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139759337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Age and Exhumation Time of the Eastern Kamchatka Sedimentary Complexes Based on Apatite Track Dating 基于磷灰石轨道测定法的东堪察加沉积岩群的年龄和出露时间

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI: 10.1134/s1819714023080122

N. V. Tsukanov, K. A. Dozorova

引用次数: 0

Regional Forecasting of Uranium Deposits in the Republic of Niger 尼日尔共和国铀矿床的地区预测

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI: 10.1134/s1819714023080158

V. N. Glaznev, O. M. Muravina, I. A. Yakuba

{"title":"Regional Forecasting of Uranium Deposits in the Republic of Niger","authors":"V. N. Glaznev, O. M. Muravina, I. A. Yakuba","doi":"10.1134/s1819714023080158","DOIUrl":"https://doi.org/10.1134/s1819714023080158","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This work deals with the methodology and results of forecasting sandstone-type uranium deposits in the territory of the Republic of Niger, based on the use of a set of regional geological and geophysical materials and a new technology for spatial analysis of data by the method of group accounting of arguments. The necessary information on the genesis and localization of the sandstone-type uranium deposits in the study area is briefly presented. Examples of identified formal geological, tectonic, and geophysical features that characterize the location of known large objects of uranium mineralization are given. Using the example of reference ore and inherently ore-free objects, an identification analysis of the features focused on determining their total information content has been carried out. The results of the identification analysis made it possible to assess the weights of the features and to perform a comprehensive regional forecasting of sandstone-type uranium deposits in the territory of the Republic of Niger. Based on the results of the forecast, the three most promising sites where detailed work on the detection of industrial uranium mineralization is recommended have been defined.</p>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New Data on the Neogene Volcano-sedimentary Complex of the Icha Depression: The Tyrkachyn Section (West Kamchatka) 伊恰凹陷新近纪火山沉积岩群的新数据：蒂尔卡钦地段（西堪察加半岛）

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI: 10.1134/s1819714023080092

T. V. Oreshkina, M. M. Pevzner, V. V. Petrova, T. D. Karimov

{"title":"New Data on the Neogene Volcano-sedimentary Complex of the Icha Depression: The Tyrkachyn Section (West Kamchatka)","authors":"T. V. Oreshkina, M. M. Pevzner, V. V. Petrova, T. D. Karimov","doi":"10.1134/s1819714023080092","DOIUrl":"https://doi.org/10.1134/s1819714023080092","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In the 90-m river bank of the middle reaches of the Icha River, thick strata of volcano-sedimentary deposits represented by pyroclastic rocks and siliceous tuffites with layers of diatomites were studied. Representative diatom assemblages assigned to the Middle Miocene Denticulopsis hyalina Zone (14.9–13.1 Ma) indicate relatively deep-water conditions of the marine basin. Comparison with the data on diatom assemblages from reference sections of West Kamchatka indicates that the deposits of the Tyrkachyn section belong to the upper part of the Kakert Formation. The petrographic composition and lithological structure of volcanogenic formations (members 1, 2, and 4) suggest that they are the product of pyroclastic flows associated with volcanic activity in central Kamchatka. It is supposed that members 1 and 2 were formed in subaerial conditions, as indicated by the complete absence of marine microfossils, signs of primary volcanic stratification, and the absence of layering. The sediments of member 4 with eroded contacts and pronounced layering apparently accumulated in a subaqueous setting.</p>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139759343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification of Natural and Man-Made Decompacted Zones in an Undermined Massif Based on High-Precision Gravimetric Observations 基于高精度重力测量观测确定地下丘陵的天然和人工解压区

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI: 10.1134/s1819714023080134

S. G. Bychkov, G. V. Prostolupov, A. A. Simanov, V. V. Khokhlova, G. P. Shcherbinina

{"title":"Identification of Natural and Man-Made Decompacted Zones in an Undermined Massif Based on High-Precision Gravimetric Observations","authors":"S. G. Bychkov, G. V. Prostolupov, A. A. Simanov, V. V. Khokhlova, G. P. Shcherbinina","doi":"10.1134/s1819714023080134","DOIUrl":"https://doi.org/10.1134/s1819714023080134","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This paper presents the results of gravimetric studies carried out at a potash deposit to obtain the information on negative engineering–geological processes in rocks caused by subsoil development. The developed high-precision monitoring gravimetric observation method makes it possible to determine field variations over time. The created physicogeological gravimetric monitoring model is a homogeneous geological medium with an isolated area with a variable rock density. The dynamic gravity anomaly processing and interpreting based on the synthesis of qualitative and quantitative methods for obtaining the geological information from the gravimetric data have been adapted for the gravimetric monitoring purposes. The interpretation resulted in a distribution area and a probable depth interval of rock decompaction, as well as rock density variations, which characterize the decompaction rate. Examples are given in relation to testing the developed technology for dividing the decompressed zones into natural and man-made zones at the Verkhnekamskoe potash deposit in order to improve its operation safety. The monitoring gravimetric observation results can be used to predict the dangerous geological process areas and to control the subsidence of the earth’s surface.</p>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139759475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reconstruction of Tectonic Stresses in Central Sakhalin 重建萨哈林岛中部的构造应力

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI: 10.1134/s1819714023080079

P. A. Kamenev, A. V. Marinin, V. A. Degtyarev, A. R. Lukmanov

引用次数: 0

Volcanic Complexes and Tectonomagmatic Stages of the Evolution of the Magellan Seamounts (Pacific Ocean). Communication 1: Volcanic Complexes 麦哲伦海隆（太平洋）的火山群和构造演化阶段。交流 1：火山群

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI: 10.1134/s1819714023080110

V. T. S’edin, S. P. Pletnev, T. E. Sedysheva

引用次数: 0

A Three-Dimensional Density Model of the Upper Crust at the Junction of the Losevo and Vorontsovka Terranes (Voronezh Crystalline Massif) 洛塞沃地层和沃龙佐夫卡地层（沃罗涅日结晶地块）交界处上地壳的三维密度模型

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI: 10.1134/s1819714023080183

O. M. Muravina, V. N. Glaznev, T. A. Voronova, R. A. Terentiev

{"title":"A Three-Dimensional Density Model of the Upper Crust at the Junction of the Losevo and Vorontsovka Terranes (Voronezh Crystalline Massif)","authors":"O. M. Muravina, V. N. Glaznev, T. A. Voronova, R. A. Terentiev","doi":"10.1134/s1819714023080183","DOIUrl":"https://doi.org/10.1134/s1819714023080183","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The detailed three-dimensional density modeling results obtained for the upper part of the earth’s crust in the area located in the northeastern part of the Voronezh crystalline massif at the junction of Losevo and Vorontsovka terranes are considered. The model obtained by solving the inverse gravimetry problem characterizes the rock density distribution in the crystalline basement to a depth of 16 km. An important role in such constructions is given to the starting model of the studied environment taking into account the available a priori geological and geophysical information: the regional density model of the East European Platform lithosphere and gravity field, data on rock density in the sedimentary cover and crystalline basement, estimated “gravity” layer thickness, the geological map of the crystalline basement, and digital elevation models of the region. The three-dimensional density model made it possible to specify the geological structure of the upper crust in the study area and to trace a deep continuation of surface structures of the basement. The obtained results are reliable due to the consistency of the accepted a priori data on the environment and agreement of model and observed gravity fields in the study area.</p>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Landslide Processes on Volcanic Edifices in the Northeastern Part of the Atlantic Ocean 大西洋东北部火山建筑物的滑坡过程

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI: 10.1134/s181971402308016x

A. O. Mazarovich

引用次数: 0

The Tectonosphere and Formation of the Mozambique Ridge: Density and Physical Modeling 构造层和莫桑比克海脊的形成：密度和物理模型

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI: 10.1134/s1819714023080195

D. A. Ryzhova, A. I. Tolstova, E. P. Dubinin, M. V. Kosnyreva, A. A. Bulychev, A. L. Groholsky

引用次数: 0