Origin of rare earth element variations in clinopyroxene from plutonic and associated volcanic rocks from the Foulde basin, Northern Kedougou inlier, Senegal, West Africa

Petrological and Structural Approach to Understanding the Mechanism of Formation and Development of Paleoproterozoic Calc-Alkaline Volcanic Rocks of West Africa’s Craton: An Example of the Mako and Foulde Groups (Kedougou Inlier in Western Senegal)

“…In this strip, the calc-alkaline rocks have been studied in two areas that stretch from the North to the South: the Mako area (Diallo,[13]; Ngom, [20]; Cissokho [18]) and the Baniomba area (Moussolo, [21]; Ngom et al, [17]). The calc-alkaline rocks also crop out in the Foulde Basin in the northwestern end of the inlier (Dioh,[14]; Dioh et al, [19] [30]).…”

“…There are two types of deposits: 1) dykes or stocks cutting the tholeiitic series (Sylvester and Attoh, [3]; Zonou et al, [8] Béziat et al, [9], Cissokho [18]); 2) flows of interbedded calc-alkaline rocks or volcanic units within the upper Paleoproterozoic sedimentary series (Vidal and Alric, [4]; Pouclet et al, [5] [6]. Lahondère et al, [10]; Bassot [1]; Ndiaye et al, [15]; Dioh et al, [19]). In the KKI, the outcrops of calc-alkaline formations are in the two contexts mentioned above.…”

“…In the KKI, the outcrops of calc-alkaline formations are in the two contexts mentioned above. They appear in the eastern edge of the Mako tholeiitic series where they cut tholeiitic basalts (Bassot, [1]; Ngom, [20]; Diallo, [13]; Cissokho, [18]) and within the sedimentary series of the Foulde Basin located in the NW (Dioh,[14]; Dioh et al, [19]).…”

“…This paper aims to analyze the petrographic, mineralogical, geochemical (rocks and minerals) characteristics of the calc-alkaline series in the western part of the Kédougou inlier and constrain, through a petrostructural study, the geodynamic context of their formation. To achieve this goal, three areas of the inlier have been considered: 1) the Foulde area where calc-alkaline series are interbedded in sedimentary series (Dioh,[14]; Dioh et al, [19]): 2) two sectors located on the eastern margin of the Mako Group corresponding to the area of Mako (Diallo,[13]; Ngom, [20]; Cissokho, [18]); and 3) the Baniomba area (Moussolo, [21]; Ngom et al, [17]).…”

Mineral chemistry and geothermobarometry of gabbroic rocks from the Gysel area, Alborz mountains, north Iran

“…Chemical composition of mineral phases in igneous rocks, specially pyroxene can be used to decipher the physico-chemical conditions of magma crystallization (Putrika et al, 2003;Putrika, 2008), the nature of original magma (Le Berger et al, 2005;Dioh et al, 2009) and the tectonic setting of magmatism (Leterrier et al, 1982). Relatively young (Tertiary) magmatism in Iran along the two main orogenic belts, Zagros and Alborz are related to different events.…”