Ziaullah Safi
Magmatic evolution, Gemological properties and Economic potential of the Spodumene-Pegmatite vein deposits, Kunar Dara-i-Pech, North/Eastern Afghanistan.
Rel. Paola Marini. Politecnico di Torino, Corso di laurea magistrale in Petroleum And Mining Engineering (Ingegneria Del Petrolio E Mineraria), 2021
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Abstract
Numerous rare-metal pegmatites are found in the mountainous terrain of the Hindu Kush in northeastern Afghanistan. The igneous rocks bodies around Dara-i-pech, Kunar, NE Afghanistan are studied in terms of their petrography, field features, and Gemological properties. Field relationships and petrographic studies lead to a distinction of the study area into (i) host rocks i.e. Grandiorite, Diorite, Quartz Diorite, Quartz-mica-schist and (ii) pegmatite bodies. Texturally the rocks are granoblastic at places, however, massive medium to coarse grained and foliated varieties do occur, particularly along the shear zones. Furthermore, the crystals have radiating and interlocking texture medium to coarse grained varieties consists of zoned, saussuritized plagioclase, and perthitic alkali feldspar.
The groundmass is predominanted by plag-feldspar, biotite, quartz, minor to accessory amounts of tourmaline, muscovite, spodumene, chlorite, epidote, garnet, zircon, sphene, and beryl
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