Fluid mechanics constraints on LIPs origin and formation

Details Fluid mechanics constraints on LIPs origin and formation Fluid mechanics constraints on LIPs origin and formation

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.v23h..03d&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #V23H-03

Physics

8125 Evolution Of The Earth (0325), 8130 Heat Generation And Transport, 8137 Hotspots, Large Igneous Provinces, And Flood Basalt Volcanism, 8147 Planetary Interiors (5430, 5724, 6024)

Scientific paper

Large Igneous Provinces represent the most voluminous igneous events on our planets and have probably ponctuated the Earth history since at least 3 Gyr. Recent fluid mechanics experiments on thermal convection show that the existence and characteristics of LIPs put tight constraints on mantle dynamics, structure and evolution. In particular, a relatively quick emplacement, hot temperature and large volume of LIPs would require a origin of LIPs deep in the lower mantle, a mantle rheology which depends strongly on temperature, and the presence of chemical heterogeneities. In the latter case, the laboratory experiments further suggest that LIPs could be heterogeneous in composition, could be followed by a variety of volcanic activities, and could even trigger subduction.

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