Numerous Oligo-Miocene plutonic and associated aplite-pegmatite rocks occur in the Western Anatolian Magmatic Complex. However, only the plutons of Namazgah, Karadağ, Soğucak and Karadoru, in the Biga Peninsula, host three different types of tourmaline: disseminated, nodular, and vein-type. These all fall into the alkali subgroup and schorl-oxy-schorl-dravite-oxy-dravite solid solution series. This study shows they were formed during late magmatic to hydrothermal stages in the roof sections (at shallow crustal levels) of the granitoid intrusions. Tourmaline compositions remained fairly homogeneous during the formation and evolution of each stage.

在安那托利亚西部岩浆复合体中存在大量的中新世的寡聚-中新世和相关的橄榄岩-斜辉岩岩。但是，仅在Biga半岛的Namazgah，Karadağ，Soğucak和Karadoru的小行星拥有三种不同类型的电气石：散布型，结节型和静脉型。这些均属于碱亚类和schorl-oxy-schorl-dravite-oxy-dravite固溶体系列。这项研究表明，它们是在岩浆晚期到热液阶段形成的，位于花岗岩侵入体的顶部（地壳浅层）。在每个阶段的形成和演化过程中，电气石的成分保持相当均匀。