التفاصيل البيبلوغرافية
| العنوان: |
Expedition 396 summary. |
| المؤلفون: |
Planke, S., Berndt, C., Zarikian, C. A. Alvarez, Agarwal, A., Andrews, G. D. M., Betlem, P., Bhattacharya, J., Brinkhuis, H., Chatterjee, S., Christopoulou, M., Clementi, V. J., Ferré, E. C., Filina, I. Y., Frieling, J., Guo, P., Harper, D. T., Jones, M. T., Lambart, S., Longman, J., Millett, J. M. |
| المصدر: |
Proceedings of the International Ocean Discovery Program, Expedition Reports; 4/6/2023, Vol. 396, p1-54, 54p |
| مصطلحات موضوعية: |
IGNEOUS provinces, BASALT, SEDIMENTARY basins, HYDROTHERMAL vents, BOREHOLES |
| مستخلص: |
The opening of the northeast Atlantic, starting around 56 My ago, was associated with the emplacement of the North Atlantic Igneous Province, including the deposition of voluminous extrusive basaltic successions and intrusion of magma into the surrounding sedimentary basins. The mid-Norwegian Margin is a global type example of such a volcanic rifted margin and is well suited for scientific drilling with its thin sediment cover and good data coverage. During International Ocean Discovery Program Expedition 396, 21 boreholes were drilled at 10 sites in five different geological settings on the mid-Norwegian Margin. The boreholes sampled a wide variety of igneous and sedimentary settings ranging from lava flow fields to hydrothermal vent complexes, along with thick successions of Upper Paleocene and Lower Eocene strata. A comprehensive suite of wireline logs was collected in eight boreholes. These data provide new constraints for geodynamic models to explain the rapid emplacement of large igneous provinces and will also allow us to test the hypothesis that the Paleocene-Eocene Thermal Maximum (PETM) was caused by hydrothermal release of carbon in response to magmatic intrusions and/or flood basalt eruption. Successful drilling and high core recovery of target intervals at all nine primary sites and one additional alternate site will allow us to achieve these goals during postcruise work. Expedition 396 highlights include (1) drilling and coring a unique, multihole transect across a supra-sill hydrothermal system and crater that was filled in during the PETM, (2) drilling and coring all the major lithofacies at each of the component parts of a volcanic rifted margin from terrestrial to deep marine, and (3) acquiring excellent petrophysical data and imaging support for core analyses of complex and diverse volcanic and volcaniclastic intervals across the terrestrial to marine transition. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
