Many thanks for references. Unfortunately I could not find the first one but the second one is available on the web. Bariand and Poullen paper is cited by others and there is no file on the web. The Fuchs et al. paper is really complete and it can be the base of future works. But it was written in 1974 and the references therein just include 7 papers and works, showing few data which is available for the area. Is there any other work after Bariand and Poullen, and Fuchs et al. papers?
I would like to add that several excellent descriptive papers have been published from work done by geologists from the former Soviet Union on the pegmatite districts of the Hindu Kush and the Pamirs., including Nuristan province, from the 1970's. I would particularly refer you to papers by LN Rossovskiy and Boris Shmakin, which describe the substantial sheeted spodumene pegmatites around this area. However, most, if not all of these are not freely available to download on the web. Some examples:
Rossovskiy, L. N., & Chmyrev, V. M. (1977). Distribution patterns of rare-metal pegmatites in the Hindu Kush (Afghanistan). International Geology Review, 19(5), 511-520.
Rossovskiy, L. N., Chmyrev, V. M., & Salakh, A. S. (1976). New fields and belts of rare-metal pegmatites in the Hindu Kush (Eastern Afghanistan). International Geology Review, 18(11), 1339-1342.
Rossovskyi, L. N., Chmyrev, V. M., & Salakh, A. S. (1976). Vertical range and zoning of spodumene pegmatite deposits in Afghanistan. In Dokl. Acad. Sci. USSR, Earth Sci. Sect (Vol. 227, pp. 85-87).
ROSSOVSKII, L., & Shmakin, B. M. (1978). UNIQUE EXAMPLE OF VERTICAL GEOCHEMICAL ZONALITY IN PEGMATITES OF HINDU KUSH (AFGHANISTAN). DOKLADY AKADEMII NAUK SSSR, 240(2), 448-451.