![]() Instead, assimilation of the sub-continental lithospheric mantle (SCLM) was instead recognized in the high-Ti basalts (TiO2> 2.0 wt.%) that were emplaced in a restricted area around the Man and Amazonian cratons (Sierra Leone, Liberia, Brazil, Guyana). Assimilation of crustal rocks generally played a minor role and rarely exceed 5-10%. We attribute these characteristics to a dominant shallow asthenospheric mantle source that was enriched by subduction-related components. 1.0-1.3 wt.%), moderately enriched Sr-Nd-Pb isotopic compositions close to the EM-II mantle end-member, and 187Os/188Os close to 0.130. These basalts have low Ti contents (TiO2 ca. ![]() All over the province, basalts with quite similar composition reflect a common mantle source. Pulsed emplacement seems consistent with high-precision geochronology, but needs further confirmation. Magmatism occurred mainly between 201.6 and 201.1 Ma (according to U-Pb and Ar/Ar ages) during the end-Triassic extinction event and a few Ma before break-up of Pangea. ![]() CAMP is characterized by 100-400 m thick preserved lava piles and by huge shallow intrusions (e.g., > 1.5 million cubic km sills). Youbi, N.īasaltic lava flows, dykes, sills, and layered intrusion of the CAMP (Central Atlantic magmatic province) crop out in Europe, Africa, North and South America over > 10 million square km, making this one of Earth's largest igneous provinces. The Central Atlantic Magmatic Province ( CAMP) ![]()
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