Ga/ Al of [ 5], and suggested that 1) the rocks are A2-type anorogenic
, and 2) they were produced in continental extensional environment.
Large-scale Cluster of Gold Deposits in East Shandong: Anorogenic
Metallogenesis (in Chinese with English abstract).
Silica-undersaturated, nepheline-bearing plutonic rocks are uncommon in the geological record and are generally attributed to small degrees of partial melting of previously metasomatized mantle in anorogenic
tectonic settings (e.
magmatic rocks in the Estonian crystalline basement.
This is the case of the Calatrava Volcanic Province in Central Spain (CVP in current literature), which has been included in the so-called Cenozoic Circum-Mediterranean anorogenic
igneous province (Fig.
2006, Petrogenesis of anorogenic
peralkaline granitic complexes from Eastern Egypt.
The third and final phase was characterized by further eruptions of pyroclastic material, forming layers which were later intruded by lamprophyric dikes and mafic plugs, and the emplacement of the Erongo Granite: an A-type (anhydrous, anorogenic
, alkaline) granite (Collins et al.
magmatism is linked to lithospheric extension, hotspots and intraplate rifting and various types of mineralization associated with this style of magmatism, including Sn, Nb, Ta, U, Th, F and Be in anorogenic
granites (Sawkins 1984), and Olympic Data-type Cu-Au-U iron-oxide deposits.
magmatic rocks within the Estonian basement have been relatively well studied.
This was accompanied and followed by widespread anorogenic
alkaline magmatism which, inter alia, gave rise to economically significant kimberlites, especially in the Kimberley area.
Yet geologists have found very little basaltic rock in North American anorogenic
formations dating from 1.