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Morphology of Shatsky Rise oceanic plateau from high resolution bathymetry
Zhang, JC; Sager, WW; Durkin, WJ; jzhang@scsio.ac.cn
2017
发表期刊MARINE GEOPHYSICAL RESEARCH
卷号38期号:1-2页码:169-185
摘要Newly collected, high resolution multi-beam sonar data are combined with previous bathymetry data to produce an improved bathymetric map of Shatsky Rise oceanic plateau. Bathymetry data show that two massifs within Shatsky Rise are immense central volcanoes with gentle flank slopes declining from a central summit. Tamu Massif is a slightly elongated, dome-like volcanic edifice; Ori Massif is square shaped and smaller in area. Several down-to-basin normal faults are observed on the western flank of the massifs but they do not parallel the magnetic lineations, indicating that these faults are probably not related to spreading ridge faulting. Moreover, the faults are observed only on one side of the massifs, which is contrary to expectations from a mechanism of differential subsidence around the massif center. Multi-beam data show many small secondary cones with different shapes and sizes that are widely-distributed on Shatsky Rise massifs, which imply small late-stage magma sources scattered across the surface of the volcanoes in the form of lava flows or explosive volcanism. Erosional channels occur on the flanks of Shatsky Rise volcanoes due to mass wasting and display evidence of down-slope sediment movement. These channels are likely formed by sediments spalling off the edges of summit sediment cap.
部门归属[Zhang, Jinchang] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China; [Sager, William W.] Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77204 USA; [Durkin, William J.] Texas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843 USA; [Zhang, Jinchang; Sager, William W.] Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA
关键词Ridge-ridge-ridge Triple Junction Large Igneous Province Oceanic Plateau Shatsky Rise Multi-beam Sounding High Resolution Bathymetry
资助项目MSG
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16502
专题中科院边缘海地质重点实验室
通讯作者jzhang@scsio.ac.cn
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Zhang, JC,Sager, WW,Durkin, WJ,et al. Morphology of Shatsky Rise oceanic plateau from high resolution bathymetry[J]. MARINE GEOPHYSICAL RESEARCH,2017,38(1-2):169-185.
APA Zhang, JC,Sager, WW,Durkin, WJ,&jzhang@scsio.ac.cn.(2017).Morphology of Shatsky Rise oceanic plateau from high resolution bathymetry.MARINE GEOPHYSICAL RESEARCH,38(1-2),169-185.
MLA Zhang, JC,et al."Morphology of Shatsky Rise oceanic plateau from high resolution bathymetry".MARINE GEOPHYSICAL RESEARCH 38.1-2(2017):169-185.
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