Reply to Comment on “U–Pb baddeleyite ages and geochemistry of dolerite dykes in the Bas-Drâa inlier of the Anti-Atlas of Morocco: Newly identified 1380Ma event in the West African Craton” by André Michard and Dominique Gasquet

History of the West African Neoproterozoic Ocean: Key to the geotectonic history of circum-Atlantic Peri-Gondwana (Adrar Souttouf Massif, Moroccan Sahara)

“…At least the latter age has to be regarded as exotic for the West African Craton and challenges the post-1700 Ma stability of the West African Craton postulated by Schofield et al (2006Schofield et al ( , 2012. This is in agreement with recently published age determinations on several dykes of basement inliers between 1380 and 1650 Ma in the Anti-Atlas Kouyaté et al, 2013;Söderlund et al, 2013) and older ages on biotite from the Amsaga area at 1494 to 1575 Ma reported by Barrère (1967). Because there were no zircons of these ages found in sample D158a, both of the apatite ages are interpreted to be linked to a slight metamorphic overprint that affected only the apatite but not the zircon lattice due to higher closing temperature (e.g.…”

U–Pb geochronology and paleomagnetism of the Westerberg Sill Suite, Kaapvaal Craton – Support for a coherent Kaapvaal–Pilbara Block (Vaalbara) into the Paleoproterozoic?

“…The grains have 'frosty' surfaces when viewed under the optical microscope, indicative of partial replacement of baddeleyite by zircon as a result of lateor post-magmatic reaction of baddeleyite with a silica-rich melt or fluid (e.g. Heaman and LeCheminant, 1993;Söderlund et al, 2013). Back scattered electron microscopy reveals the presence of zircon in ca.…”

Widespread ca. 1.4 Ga intraplate magmatism and tectonics in a growing Amazonia

“…1.44 -1.42 Ga activity of Amazonia does not have an age match with other crustal blocks except in the NW West African Craton (WAC) where two dated dykes in one Anti-Atlas inlier yielded in situ baddeleyite ages of ca. 1416 Ma age (Söderlund et al 2013). It was concluded that the earlier U -Pb ID-TIMS baddeleyite ages reported for these same dykes (El Bahat et al 2013) had been biased to an incorrect younger 1380 Ma age by processes related to younger regional overprinting events.…”

“…1416 Ma age (Söderlund et al 2013). It was concluded that the earlier U -Pb ID-TIMS baddeleyite ages reported for these same dykes (El Bahat et al 2013) had been biased to an incorrect younger 1380 Ma age by processes related to younger regional overprinting events. Consequently, there is a match between (2015) Teixeira et al: Mesoproterozoic magmatism and tectonics in Amazonia the 1.42 Ga magmatism of NW-WAC and the ca.…”