{"title":"Rifting in the Western Pacific Marginal Seas","authors":"V. V. Golozubov, Phung Van Phach, Le Dyk Anh","doi":"10.1134/s1819714024010032","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The structural features of rifting are reviewed during the formation of Cenozoic basins of the Western Pacific marginal seas. The examples of studied basins confirmed a hypothesis that rifting always starts from a passive phase and is only interrupted by episodes of active rifting. Rifting occurred under NE- and NNE-trending horizontal compression with the formation of either a chain of pull-apart basins or fields of diffuse rifting between the large strike-slip faults (the main part of the South China Sea). The NE and NNE directions of horizontal compression are probably related to the upper mantle convective flows from a spreading ridge of the Indian Ocean, which bear the plate fragments variously deformed during the transportation. The related NNE drift of the Indian, Australian, and Eurasian plates has no link with subduction processes from adjacent Paleopacific plates, which continue to move to northwest. The Western Pacific marginal basins mainly formed without any subduction influence from the Pacific Ocean and can be called backarc basins only based on geographical features.</p>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.9000,"publicationDate":"2024-04-06","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/s1819714024010032","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}
引用次数: 0
Abstract
The structural features of rifting are reviewed during the formation of Cenozoic basins of the Western Pacific marginal seas. The examples of studied basins confirmed a hypothesis that rifting always starts from a passive phase and is only interrupted by episodes of active rifting. Rifting occurred under NE- and NNE-trending horizontal compression with the formation of either a chain of pull-apart basins or fields of diffuse rifting between the large strike-slip faults (the main part of the South China Sea). The NE and NNE directions of horizontal compression are probably related to the upper mantle convective flows from a spreading ridge of the Indian Ocean, which bear the plate fragments variously deformed during the transportation. The related NNE drift of the Indian, Australian, and Eurasian plates has no link with subduction processes from adjacent Paleopacific plates, which continue to move to northwest. The Western Pacific marginal basins mainly formed without any subduction influence from the Pacific Ocean and can be called backarc basins only based on geographical features.
摘要 综述了西太平洋边缘海新生代盆地形成过程中的断裂构造特征。所研究的盆地实例证实了这样一种假设，即断裂总是从被动阶段开始，仅被主动断裂打断。断裂是在 NE 和 NNE 走向的水平压缩作用下发生的，在大型走向滑动断层（中国南海的主要部分）之间形成了拉裂盆地链或弥漫断裂带。水平压缩的 NE 和 NNE 方向可能与来自印度洋扩张脊的上地幔对流有关，这些对流承载着搬运过程中发生不同变形的板块碎片。印度板块、澳大利亚板块和欧亚板块的相关 NNE 漂移与相邻的古太平洋板块的俯冲过程没有联系，后者继续向西北方向移动。西太平洋边缘盆地主要是在没有受到太平洋俯冲影响的情况下形成的，只能根据地理特征称之为弧后盆地。
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.
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