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Because many questions still persist, we used the long, thick, and deep\u2010seated Foum Zguid dyke (Morocco) to investigate dyke emplacement and internal flow by means of magnetic methods, structural analysis, petrography, and scanning electron microscopy. We also investigated how the host rocks accommodated the intrusion. Regarding internal flow: 1. Important variations of the rock magnetic properties and magnetic fabric occur with distance from dyke wall; 2. anisotropy of anhysteretic remanent magnetization reveals that anisotropy of magnetic susceptibility (AMS) results mainly from the superposition of subfabrics with distinct coercivities and that the imbrication between magnetic foliation and dyke plane is more reliable to deduce flow than the orientation of the AMS maximum principal axis; and 3. a dominant upward flow near the margins can be inferred. The magnetic fabric closest to the dyke wall likely records magma flow best due to fast cooling, whereas in the core the magnetic properties have been affected by high\u2010temperature exsolution and metasomatic effects due to slow cooling. Regarding dyke emplacement, this study shows that the thick forceful intrusion induced deformation by homogeneous flattening and\/or folding of the host sedimentary strata. Dewatering related to heat, as recorded by thick quartz veins bordering the dyke in some localities, may have also helped accommodating dyke intrusion. The spatial arrangement of quartz veins and their geometrical relationship with the dyke indicate a preintrusive to synintrusive sinistral component of strike slip.<\/jats:p>","DOI":"10.1029\/2010jb007638","type":"journal-article","created":{"date-parts":[[2010,12,29]],"date-time":"2010-12-29T21:01:10Z","timestamp":1293656470000},"source":"Crossref","is-referenced-by-count":22,"title":["Thick dyke emplacement and internal flow: A structural and magnetic fabric study of the deep\u2010seated dolerite dyke of Foum Zguid (southern Morocco)"],"prefix":"10.1029","volume":"115","author":[{"given":"Pedro F.","family":"Silva","sequence":"first","affiliation":[{"name":"Departamento de Engenharia Civil, Instituto Superior de Engenharia de Lisboa  Lisbon Portugal"},{"name":"Instituto Dom Lu\u00eds Universidade de Lisboa  Lisbon Portugal"}]},{"given":"Fernando O.","family":"Marques","sequence":"additional","affiliation":[{"name":"Instituto Dom Lu\u00eds Universidade de Lisboa  Lisbon Portugal"}]},{"given":"Bernard","family":"Henry","sequence":"additional","affiliation":[{"name":"Pal\u00e9omagn\u00e9tisme Institut de Physique du Globe de Paris, CNRS  Saint\u2010Maur France"}]},{"given":"Pedro","family":"Madureira","sequence":"additional","affiliation":[{"name":"Departamento de Geoci\u00eancias, Centro de Geof\u00edsica de \u00c9vora Universidade \u00c9vora  Evora Portugal"}]},{"given":"Ann M.","family":"Hirt","sequence":"additional","affiliation":[{"name":"Laboratory of Natural Magnetism Institute of Geophysics, ETH Zurich  Zurich Switzerland"}]},{"given":"Eric","family":"Font","sequence":"additional","affiliation":[{"name":"Instituto Dom Lu\u00eds Universidade de Lisboa  Lisbon Portugal"}]},{"given":"Nuno","family":"Louren\u00e7o","sequence":"additional","affiliation":[{"name":"Instituto Dom Lu\u00eds Universidade de Lisboa  Lisbon Portugal"},{"name":"Estrutura de Miss\u00e3o para a Extens\u00e3o da Plataforma Continental  Paco de Arcos Portugal"}]}],"member":"13","published-online":{"date-parts":[[2010,12,30]]},"reference":[{"key":"e_1_2_12_2_1","first-page":"209","article-title":"Un exemple de diff\u00e9renciation transverse: Le Grand Dyke de Foum Zguid (Anti\u2010Atlas, Maroc)","volume":"319","author":"Aarab E. 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