{"title":"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","authors":"V. T. S’edin, S. P. Pletnev, T. E. Sedysheva","doi":"10.1134/s1819714023080110","DOIUrl":null,"url":null,"abstract":"<p>The paper presents original and published geochronological data on the volcanic rocks of the Magellan Seamounts. These data and available geological materials allow us to distinguish five major volcanic complexes of different ages in the guyots of the Magellan Seamounts: (1) Late Jurassic–Early Cretaceous (earliest Cretaceous); (2) Early Cretaceous (Aptian–Albian); (3) Late Cretaceous (Late Cenomanian–Turonian–Early Campanian); (4) Late Cretaceous (Late Campanian–Maastrichtian); (5) Cenozoic. Each of these age complexes corresponds to a peculiar tectonomagmatic stage of the evolution of the Magellan Seamounts and characterizes a specific geomorphological space (pedestal, main body, small complicating superimposed structures of the second order). This division is based on the numerous isotopic age determinations for 11 guyots obtained by K-Ar and Ar-Ar methods. The tectonomagmatic evolutionary stages of the Magellan Seamounts correspond, in general, to the periods of tectonic activation for other structures of the Pacific seafloor.</p>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":"27 1","pages":""},"PeriodicalIF":0.9000,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Volcanic Complexes and Tectonomagmatic Stages of the Evolution of the Magellan Seamounts (Pacific Ocean). Communication 1: Volcanic Complexes\",\"authors\":\"V. T. S’edin, S. P. Pletnev, T. E. Sedysheva\",\"doi\":\"10.1134/s1819714023080110\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The paper presents original and published geochronological data on the volcanic rocks of the Magellan Seamounts. These data and available geological materials allow us to distinguish five major volcanic complexes of different ages in the guyots of the Magellan Seamounts: (1) Late Jurassic–Early Cretaceous (earliest Cretaceous); (2) Early Cretaceous (Aptian–Albian); (3) Late Cretaceous (Late Cenomanian–Turonian–Early Campanian); (4) Late Cretaceous (Late Campanian–Maastrichtian); (5) Cenozoic. Each of these age complexes corresponds to a peculiar tectonomagmatic stage of the evolution of the Magellan Seamounts and characterizes a specific geomorphological space (pedestal, main body, small complicating superimposed structures of the second order). This division is based on the numerous isotopic age determinations for 11 guyots obtained by K-Ar and Ar-Ar methods. The tectonomagmatic evolutionary stages of the Magellan Seamounts correspond, in general, to the periods of tectonic activation for other structures of the Pacific seafloor.</p>\",\"PeriodicalId\":49583,\"journal\":{\"name\":\"Russian Journal of Pacific Geology\",\"volume\":\"27 1\",\"pages\":\"\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2024-02-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Russian Journal of Pacific Geology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.1134/s1819714023080110\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Pacific Geology","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1134/s1819714023080110","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Volcanic Complexes and Tectonomagmatic Stages of the Evolution of the Magellan Seamounts (Pacific Ocean). Communication 1: Volcanic Complexes
The paper presents original and published geochronological data on the volcanic rocks of the Magellan Seamounts. These data and available geological materials allow us to distinguish five major volcanic complexes of different ages in the guyots of the Magellan Seamounts: (1) Late Jurassic–Early Cretaceous (earliest Cretaceous); (2) Early Cretaceous (Aptian–Albian); (3) Late Cretaceous (Late Cenomanian–Turonian–Early Campanian); (4) Late Cretaceous (Late Campanian–Maastrichtian); (5) Cenozoic. Each of these age complexes corresponds to a peculiar tectonomagmatic stage of the evolution of the Magellan Seamounts and characterizes a specific geomorphological space (pedestal, main body, small complicating superimposed structures of the second order). This division is based on the numerous isotopic age determinations for 11 guyots obtained by K-Ar and Ar-Ar methods. The tectonomagmatic evolutionary stages of the Magellan Seamounts correspond, in general, to the periods of tectonic activation for other structures of the Pacific seafloor.
期刊介绍:
Russian Journal of Pacific Geology publishes the results of research on the Earth crust and mantle composition and provides articles on the geological structure and patterns of distribution of mineral deposits in the Pacific Ocean, marginal seas and continental margins. It discusses the topics of stratigraphy, sedimentology, magmatic activity, and seismicity. The journal deals with the problems of lithosphere plates tectonics, and offers the results of neotectonic, geomorphological, geodesic, environmental and mining studies in the Pacific region. The journal accepts theoretical, methodical and philosophical articles covering general issues of geology, geophysics, geochemistry, geoecology and mining. The journal also publishes critical notes and comments, and reviews.