Allchar (Alsar), Roszdan, Republic of Macedonia

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Famous epithermal As-Sb-(Au-Tl) deposit with several rare Tl minerals.
Allchar ore is a disseminated Au-As-Sb-Tl-Hg mineralization hosted in Triassic carbonates, Tertiary interbedded volcanic tuffs and dolomites, and Pliocene felsic tuffs. Both the Triassic and Tertiary rocks are intruded by hydrothermally altered, porphyritic, subvolcanic rocks.

NOTE: Mineral collecting at Allchar is only allowed with permission from the University of Skopje. The area will be declared a protected site. Several collectors without this permit were arrested by police.
For details see http://www.mineralienatlas.de/forum/index.php/topic,21622.msg193776/topicseen.html#new (in German).

References

• Ivanov, T. (1965): Zonal distribution of elements and minerals in the deposit Alsar. In Symp. on Problems of Postmagmatic Ore Deposition II (Prague). Geol. Soc. Czechoslovakia, 186-191.
• Baric, L. (1981): Allchar - Seltene Thalliummineralien aus Jugoslawien. Lapis, 6 (3), 15-xx.
• Pavicevic, M.K. (1988): Lorandite from Allchar - a low energy solar neutrino dosimeter. Nuclear Instruments Methods Phys. Res., A271, 287-296.
• Beran, A., Gotzinger, M. & Rieck, B. (1990): Fluid inclusions in realgar from Allchar. In Symp. on Thallium Neutrino Detection (Dubrovnik, Yugoslavia), 42 (abstr.)
• Jankovic, S. & Jelenkovic, R. (1990): General metallogenic features on thallium mineralization in the Alsar deposit (Yugoslavia). In Symp. on Thallum Neutrino Detection (Dubrovnik, Yugoslavia), 32-35 (abstr.)
• Percival, T.J. & Boev, B. (1990): As-Tl-Sb-Hg-Au-Ba mineralization Alsar district, Yugoslavia. A unique type of Yugoslavian ore deposit. In Symp. on Thallium Neutrino Detection (Dubrovnik, Yugoslavia), 36-37 (abstr.)
• Percival, T.J. & Radtke, A.S. (1990): Carlin type gold mineralization in the Alsar district, Macedonia, Yugoslavia. 8th IAGOD Symp., Ottawa, 108 (abstr.)
• Serafimosvki, T., Boev, B. & Mudrinic, C. (1991): Isotopic composition of the sulphur in the sulphides from As-Sb deposit, Alsar. Geol. Macedonica, 5, 165-172.
• Frantz, E. et al. (1994): Geochemistry of Tl-As minerals and host rocks at Allchar (FYR Macedonia). N. Jb. Miner. Abh. 167, 359-399.
• Rieck, B. (1993): Famous mineral localities: Allchar, Macedonia. Mineralogical Record, 24, 437-449.
• Percival, T.J. & Radtke, A.S. (1994): Sedimentary-rock-hosted disseminated gold mineralization in the Alsar district, Macedonia. Canadian Mineralogist, 32, 649-655.
• Rieck, B. (2003): Allchar, minerales de talio en Macedonia. Revista de minerales, 2(4), 49-59.
• Volkov, A.V., Serafimovski, T., Kochneva, N.T., Tomson, I.N., and Tasev, G. (2006): The Alshar epithermal Au–As–Sb–Tl deposit, southern Macedonia. Geology of Ore Deposits 48, 3, 175-192.
• Percival, T.J. & Radtke, A.S. (1994): Sedimentary-rock-hosted disseminated gold mineralization in the Alsar district, Macedonia. Canadian Mineralogist, 32, 649-655.
• Caubel, A. & Galvier, J. (2000): Le Thallium, ses minéraux, son utilisation. Le Règne Minéral, 32, 31-43.

Mineral List

Mineral list contains entries from the region specified including sub-localities

Aragonite Arsenolite Arsenopyrite Baryte Bernardite (TL) Calcite Cervantite Chalcopyrite Christite Cinnabar Claudetite Copiapite Dolomite Dorallcharite (TL) Epsomite

Fangite Fibroferrite Goethite Gold Gypsum Hexahydrite Hörnesite Jankovićite (TL) Jarosite Limonite Lorándite (TL) Mansfieldite Marcasite Melanterite Metacinnabar

Muscovite var: Sericite Oregonite Orpiment Parapierrotite (TL) Pararealgar Petzite Pharmacolite Picotpaulite (TL) Picropharmacolite Pyrite Quartz Raguinite (TL) Realgar Rebulite Rhomboclase ?

Roméite Group var: Stibiconite Routhierite Rozenite Scorodite Simonite (TL) Starkeyite Stibnite Sulphur Valentinite Vrbaite (TL) 'Wad' Weissbergite Wulfenite

73 entries listed. 53 valid minerals. 9 type localities (valid minerals).

Localities in this Region

Republic of Macedonia Roszdan Allchar (Alsar) Crven Dol mine