Shikoku Basin and Its Margins - Springer
The Shikoku Basin is an inactive backarc basin located south of the southwest Japan arc in the northwestern Pacific margin. Its characteristic features are summarized on the basis of updated geophysical and geological data, including swath bathymetry, gravity, magnetics, and seismic reflection profiling records as well as results from the DSDP ...
Geochemical Variation of Miocene Basalts within Shikoku Basin
2020年12月28日 · Shikoku Basin is unique as being located within a trench-ridge-trench triple junction. Here, we report mineral compositions, major, trace-element, and Sr-Nd-Pb isotopic compositions of bulk-rocks from Sites C0012 (>18.9 Ma) …
Shikoku Basin and Its Margins - Semantic Scholar
The Shikoku Basin is an inactive backarc basin located south of the southwest Japan arc in the northwestern Pacific margin. Its characteristic features are summarized on the basis of updated geophysical and geological data, including swath bathymetry, gravity, magnetics, and seismic reflection profiling records as well as results from the DSDP ...
Geochemical characteristics of back-arc basin lower crust and …
2021年11月20日 · This paper explores the evolutional process of back-arc basin (BAB) magma system at final spreading stage of extinct BAB, Shikoku Basin (Philippine Sea) and assesses its tectonic evolution using a newly discovered oceanic core complex, the Mado Megamullion.
菲律宾海四国海盆地壳结构重力反演及其形成演化过程分析
Abstract: The Shikoku basin is a back-arc basin in the Philippine Sea which experienced arc rifting in Cenozoic. Study on deep structures plays an important role in understanding the break-up of the Izu-Bonin-Mariana arc and back-arc rifting history.
Evolution of the Shikoku Basin - J-STAGE
1994年6月20日 · The Shikoku Basin is a backarc basin occupying the northern part of the Philippine Sea Plate. The recent Continental Shelf Survey Project of Hydrographic Department, Maritime Safety Agency of Japan reveals interesting features of the basin genesis.
Tectonic history of the Shikoku marginal basin - ScienceDirect
1975年4月1日 · The observed magnetic lineation pattern and basement morphology can be best explained if the Shikoku basin formed at a two-limb spreading system during the Late Oligocene to Middle Miocene. Subsequently the eastern half of the basin was disrupted by fractures as the Iwo-Jima ridge collided with the Japanese islands.
Evolution of the Shikoku Basin - Semantic Scholar
1994年6月20日 · Based on detailed mapping of magnetic anomalies and topography, we propose a scenario of evolution of the Shikoku Basin from 30 Ma to 15 Ma. The history of Shikoku Basin is divided into five stages as follows-rifting, NNW-SSE opening, N-S opening, NW-SE opening, and volcanism and deformation after opening.
四国海盆起源与沉积环境演化 THE ORIGIN AND SEDIMENTARY …
2015年7月20日 · 四国海盆具有典型的弧后盆地沉积特征， 主要包括半远洋沉积、 火山碎屑沉积和少量的远洋沉积。 在早中新世、 中中新世、 晚中新世、 上新世、 更新世盆地发育的不同阶段， 都有一定的岩相组合特征， 并反映了当时的沉积环境。 中中新世在盆地的北部和东部， 晚中新世在盆地的北部、 东北部， 上新世和更新世在盆地的北部、 东北部和西北部均发育有碎屑沉积。 由于中更新世南海海槽的形成及其对物源的阻隔作用， 在盆地北部发育了远洋粘土和钙质生物 …
弧後盆地 - 维基百科，自由的百科全书
弧後盆地 （Back-arc basins）是屬於隱沒系統中的地質構造單元。 弧後盆地即在隱沒帶，坐落於火山弧後面的盆地，即稱之 [1]。 弧後盆地最廣為討論的應屬分布在西太平洋一系列的弧後盆地，如： 日本海 、 馬里亞納海槽 、 勞盆地 等。 此外，因其分部特徵大多位在大陸與海洋的邊緣，亦可稱之為邊緣海盆（marginal basin），有些弧後盆地會介於兩個火山弧之間，是以也有些被稱為弧間盆地（interarc basin）。 剖面顯示了弧後盆地的發育過程。 擴張中產生了新的海洋 …
- 某些结果已被删除