An Introduction to camptonite lamprophyric dikes at Misho Mountains (Almas area - East Azarbaijan Province)
The Almas area in NW of the East Azarbaijan Province, is a part of the Soltaniye-Misho zone. The lamprophyric dikes crosscut the Kahar Formation. The principal minerals of these rocks are amphibole (amphibole phenocrysts are longer than 3 cm), biotite, pyroxene, olivine, plagioclase, apatite, calcite and chlorite with porphyritic texture. According to mineralogical and geochemical evidences, the studied lamprophyres are camptonite with alkaline nature. The plotted spider diagrams indicate that the studied lamprophyres are enriched in light rare earth elements (LREE) and incompatible elements in comparison to heavy rare earth elements (HREE). The parent magma is probably generated from spinel lherzolite mantle with low rate partial melting.
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