Magnetic polarity structure of the lower oceanic crust

Allerton S.; Tivey MA.

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Magnetic polarity structure of the lower oceanic crust

机译：下洋壳的磁极结构

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A newly developed rock drill was used to take the first fully oriented samples from in-situ gabbros exposed on Atlantis Bank, which formed 11 m.y. ago on the Southwest Indian Ridge (SWIR). These paleomagnetic data locate the seabed outcrop of a normal polarity magnetic lineation within an outcrop of lower crust that correlates with overlying deep-towed and sea-surface magnetic field measurements. A systematic lateral offset between the seabed boundary and measured anomalies implies that the reversal boundary dips similar to 25 degrees to the south, away from the ridge axis. Paleomagnetic results suggest that following magnetization acquisition, the platform tilted south by similar to 20 degrees (range: 33 south degrees to 7 degrees north), implying an original reversal boundary dip of only similar to5 degrees. [References: 35]

机译：一个新开发的凿岩机被用来从暴露于亚特兰蒂斯银行的原位长颈鹿中提取第一个完全定向的样本，该亚特兰蒂斯银行形成于11个月。以前在西南印第安岭（SWIR）上。这些古磁数据将正极性磁力线的海底露头定位在下地壳露头内，这与上覆的深拖曳和海面磁场测量值相关。海床边界和测得的异常之间的系统性横向偏移意味着反转边界向南倾斜约25度，远离山脊轴线。古磁结果表明，在磁化强度采集之后，平台向南倾斜约20度（范围：南纬33度至北纬7度），这意味着原始的反转边界倾角仅为约5度。 [参考：35]

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《Geophysical Research Letters》 |2001年第3期|共4页
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Allerton S.; Tivey MA.;
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中图分类地球物理学;
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1. Magnetic polarity structure of the lower oceanic crust [J] . Allerton S., Tivey MA. Geophysical Research Letters . 2001,第3期

机译：下洋壳的磁极结构
2. Subducted oceanic crust as the origin of seismically slow lower-mantle structures [J] . Timothy D. Jones, Ross R. Maguire, Peter E. van Keken, Progress in Earth and Planetary Science . 2020,第1期

机译：被底层海底作为地震慢碎屑结构的起源
3. Laboratory measurements of electrical conductivity in a gabbro of the Oman ophiolite at high-pressures and high-temperatures: implications for interpretation of resistivity structures of lower oceanic crust [J] . Satoshi Saito, Nikolai S. Bagdassarov Journal of Mineralogical and Petrological Sciences . 2018,第2期

机译：在高压和高温下在阿曼蛇绿岩长辉岩中电导率的实验室测量：对解释低层洋壳电阻率结构的意义
4. Structure Maps of the Top-Rift Unconformity/Oceanic Crust and Top Cretaceous Surfaces, and the Oxfordian Rift-Drift Reconstruction, Gulf of Mexico [C] . James Pindell, Barbara Radovich, Ed Haire, Convention of the Gulf Coast Association of Geological Societies American Association of Petroleum Geologists Sectional Meeting;Meeting of the Gulf Coast Section of the Society of Economic Paleontologists and Mineralogists . 2015

机译：顶部裂缝无关/海外壳和顶部白垩纪表面的结构图，以及墨西哥湾的牛津族裂缝重建
5. Crustal Lithium Isotopic Profile Through the Bay of Islands Ophiolite: The Implications for the Extent of Hydrothermal Cooling of the Lower Oceanic Crust [D] . Li, Linhan 2018

机译：穿过岛屿蛇绿岩湾的地壳锂同位素剖面：对下部大洋地壳水热冷却程度的影响
6. Deep-sea benthic communities in the largest oceanic desert are structured by the presence of polymetallic crust [O] . Juliette Delavenne, Louise Keszler, Magalie Castelin, -1

机译：最大金属沙漠中的深海底栖生物群落由多金属壳构成
7. Magnetic Mineral Populations in Lower Oceanic Crustal Gabbros (Atlantis Bank, SW Indian Ridge): Implications for Marine Magnetic Anomalies [O] . J. A. Bowles, A. Morris, M. A. Tivey, 2020

机译：低海洋地壳Gabbros（亚特兰蒂斯银行，SW印度山脊）的磁矿种群：对海洋磁性异常的影响
8. Structure and Constitution of the Lower Oceanic Crust. [R] . Christensen, N. I., Salisbury, M. H. 1974

机译：低海洋地壳的结构与构成。

Magnetic polarity structure of the lower oceanic crust

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