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diapir |
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diapir [′dī·ə‚pir] (geology) A dome or anticlinal fold in which a mobile plastic core has ruptured the more brittle overlying rock. Also known as diapiric fold; piercement dome; piercing fold. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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It has been argued that three-dimensional views of seismic wave velocities (seismic tomography) do provide support for hot, low-density (low-velocity) diapirs (plumes) rising from the core-mantle boundary to the lithosphere below oceanic islands such as Hawaii and Iceland (Ji and Nataf, 1998; Bijwaard and Spakman, 1999; Zhao, 2001). The slope is being extensively deformed by a mass of salt diapirs, or rising domes, which is wedging itself between layers of mud as it flows downslope. This allows E&P companies to construct and manipulate complex geological models such as salt diapirs, overturned folds and reverse faults quickly, accurately and cost-effectively. |
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