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首页> 外文OA文献 >Seismic stratigraphy of the High Plateau, Mahiniki Plateau, as seen in seismic reflection data measured during cruise SO224
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Seismic stratigraphy of the High Plateau, Mahiniki Plateau, as seen in seismic reflection data measured during cruise SO224

机译：高原，mahiniki高原的地震地层学，如巡航sO224期间测量的地震反射数据所示

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摘要

The Manihiki Plateau, located in the Equatorial Pacific, is a Large Igneous Province (LIP) formed during the Cretaceous. Previous studies point out multiple phases of volcanic activity with a complex geodynamic evolution but the setting of formation as well as its role in the ocean palaeocirculation remain unclear. Here, high resolution seismic data are presented that were gathered during cruise SO224 to study the plateau’s development following the initial phase of creation and the sedimentary distribution. First results of seismic stratigraphy for profile AWI-20120001 show six reflectors below seafloor in the sedimentary column, which match well the sedimentary structures presented by Shipboard Scientific Party, 1976 for campain DSDP Leg 33 Site 317. Comparing our data to the lithology of their borehole data the six horizons in four units can be identified ranging from age older than Aptian-Barremian to Quaternary, comprising basalt, limestone and volcaniclastic, cherts and chalks and calcareous ooze.
机译：位于赤道太平洋的Manihiki高原是白垩纪形成的大火成岩省（LIP）。先前的研究指出，火山活动具有复杂的地球动力学演化的多个阶段，但其形成的背景及其在海洋古环流中的作用仍不清楚。在这里，展示了高分辨率的地震数据，这些数据是在SO224巡洋舰期间收集的，用于研究高原初始形成和沉积分布之后的发展。 AWI-20120001剖面地震地层的初步结果显示，沉积柱中海床以下有6个反射器，这与1976年Shipboard Scientific Party针对Campanin DSDP Leg 33 Site 317提出的沉积结构十分吻合。将我们的数据与其钻孔的岩性进行比较数据可以确定四个单位中的六个层位，范围从Aptian-Barremian年龄到第四纪，包括玄武岩，石灰石和火山碎屑、,石和白垩以及钙质软泥。

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