GEOLOGY AND MINERALOGY OF THE PEGMATITES OF SOUTH MASHHAD (NE IRAN); WITH ESPECIAL EMPHASIS ON THE LITHIUM MINERALIZATION THEREIN

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DIDAR P.; NEZAFATI N.; EMAMI M.H.; SOLGI A.

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Journal: GEOSCIENCES Year:2015 | Volume:24 | Issue:94 (PETROLOGY & MINERALOGY) Page(s): 209-218

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Title

GEOLOGY AND MINERALOGY OF THE PEGMATITES OF SOUTH MASHHAD (NE IRAN); WITH ESPECIAL EMPHASIS ON THE LITHIUM MINERALIZATION THEREIN

Author(s)

DIDAR P. | NEZAFATI N. | EMAMI M.H. | SOLGI A. | Issue Writer Certificate

Keywords

PEGMATITESQ2

LITHIUMQ1

LEPIDOLITEQ2

GRANITEQ2

SOUTH OF MASHHADQ2

Abstract

by several pegmatite veins. These granitic bodies are of orogenic (collisional), peraluminous, S- type and host the PEGMATITES in an area of 40km2. This paper presents the geological, geochemical, and mineralogical investigations on the pegmatite veins in order mainly to examine their economic value for LITHIUM and LITHIUM bearing minerals. For this purpose, the pegmatite veins of the area were first mapped and sampled. In this regard, more than 100 samples from the PEGMATITES and associated GRANITEs were taken and investigated using polarized microscopy, SEM, XRD, and ICP. According to the field observations and laboratory examinations, seven individual pegmatite facies were recognized, all of which of LCT (Li, Cs, Ta) type (based on Cerny-2005-classification). The studied PEGMATITES contain three main types of mica including muscovite, LEPIDOLITE, and biotite and host from 430 to 1150 ppm LITHIUM. Beside LITHIUM bearing mica, presence of some other minerals such as garnet (almandine-spessartite), tourmaline (schorl-dravite series and schorl-elbaite series), and apatite are of interest, especially because of their potential for hosting REEs. The average of A/CNK index for the PEGMATITES is 1.3 to 1.6, while the average of Mg/Li is 3.9 to 24.1. The average of LITHIUM for the facies of “quartz + tourmaline ± muscovite” is 19.3ppm, while the average of Li for the facies of “quartz + potassium feldspar + plagioclase + muscovite + LEPIDOLITE + biotite + tourmaline” is 177.2 ppm. The low Mg/Li ratio, the high content of LITHIUM, and the mineralization of LEPIDOLITE introduce the PEGMATITES of Mashhad as a significant potential for LITHIUM, what that is being introduced for the first time from these PEGMATITES.

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APA: Copy

DIDAR, P., NEZAFATI, N., EMAMI, M.H., & SOLGI, A.. (2015). GEOLOGY AND MINERALOGY OF THE PEGMATITES OF SOUTH MASHHAD (NE IRAN); WITH ESPECIAL EMPHASIS ON THE LITHIUM MINERALIZATION THEREIN. GEOSCIENCES, 24(94 (PETROLOGY & MINERALOGY)), 209-218. SID. https://sid.ir/paper/31357/en

Vancouver: Copy

DIDAR P., NEZAFATI N., EMAMI M.H., SOLGI A.. GEOLOGY AND MINERALOGY OF THE PEGMATITES OF SOUTH MASHHAD (NE IRAN); WITH ESPECIAL EMPHASIS ON THE LITHIUM MINERALIZATION THEREIN. GEOSCIENCES[Internet]. 2015;24(94 (PETROLOGY & MINERALOGY)):209-218. Available from: https://sid.ir/paper/31357/en

IEEE: Copy

P. DIDAR, N. NEZAFATI, M.H. EMAMI, and A. SOLGI, “GEOLOGY AND MINERALOGY OF THE PEGMATITES OF SOUTH MASHHAD (NE IRAN); WITH ESPECIAL EMPHASIS ON THE LITHIUM MINERALIZATION THEREIN,” GEOSCIENCES, vol. 24, no. 94 (PETROLOGY & MINERALOGY), pp. 209–218, 2015, [Online]. Available: https://sid.ir/paper/31357/en

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