Fig. 3. Chemical composition of the rocks of mafic intrusions and the dikes of the Agardag complex of Western Sangilen. 1 – 5 , intrusions: 1 , Karashat, 2 , Bayan-Kol, 3 , Bashkymugur, 4 , Pravotarlashkyn, 5 , Erzin; 6 , alkali basalts of the Agardag complex.

Fig. 12. Chondrite-normalized ( Boynton, 1984 ) REE and primitive mantle-normalized ( Sun and McDonough, 1989 ) trace element patterns of alkali basalts of the Agardag complex.

and Bashkymugur intrusions; 5 , monzodiorites of the Bashkymugur intrusion; 6 , Ordovician granitoids; 7 , dikes of the Agardag complex; 8 , faults; 9 , stratification dips and strikes; 10 , altitude, m.

Fig. 13. The ophiolites of the Agardag zone (South Tuva). 1 — Quaternary deposits; 2 — Neogenic deposits; 3 – 7 — Vendian-Cambrian complexes of Agardag ophiolite zone: 3 — effusion-sedimentary thicknesses, 4 — ultrabasic rocks, 5 — gabbro-hyperbasite complexes, 6 — gabbroids, 7

Fig. 1. Schematic occurrence of the camptonite dikes of the Agardag alkali-basaltoid complex, western Sangilen; the map was compiled using the data of A.S. Gibsher and A.G. Vladimirov. The ages of the Pravyi Tarlashkyn and Bashky-Mugur massifs are given after Izokh et al. (2001a) . 1

Fig. 1. Schematic map of the Agardag ore occurrence. a , Geological scheme of the localization of the Agardag ultramafic massif (fragment of the geological map of Tuva compiled by B.M. Strunin after the State geological maps on a scale of 1:10,000,000 and 1:200,000 (2002)): 1 , Neogene

Fig. 4. Radiogeochemical typification of granitoids of Mongolia. 1 , gabbro-diorite–granite complex (Erdenedavaa, Khamar Davaa, Gargan, and Ilchir), 2 , Lake (Hovd) and Turgen granitoid plutons, 3 , Ulaan Del granitoids, 4 , granitoids of the Turgen Gol terrane, near the Askhatin deposit, 5

Fig. 1. Diagram NiO-Fe′ for olivines from ultrabasic rocks of ophiolite massifs of the Altai-Sayan fold area. 1 – Srednetersinsky (Mt. Stanovoi Khrebet) [ 11 ]; 2 – Chagan-Uzun; 3 – Kurtushibinsky; 4 – Agardag; 5 – Ulor; 6 – Karashat; 7 – dunites, 8 – wehrlites, 9

massif, II – Dzabkhan massif, III – Tarbagatai massif), 3 – CAOB paleozoids, 4 – faults, 5 – position of the Western Sangilen. b – geological scheme of the Western Sangilen according to ( Vladimirov et al., 2005 ). 1 – formation of the Tannuol island arc; 2 – undivided metamorphic complexes

–monzodiorite–granite–leucogranite complex; 12 , tectonic zones: (er) Erzin, (ko) Kokmolgarga; 13 , Agardag suture; 14 , borders of overthrust mass; 15 , faults; 16 , tectonic blocks (13): 1, Tarlashkin, 2, Mugur-Chinchilig, 3, Erzin–Naryn. Insets: A , Location of Western Sangilen within the structure

Fig. 1. Geological scheme of Western Sangilen. 1 – loose deposits; 2 – metabasic rocks of the Agardag fault; 3 – carbonate series of the cover of the Sangilen Massif; 4 – metamorphic rocks of the basement, 5 – allochthonous granites; 6 , 7 – para- and autochthonous granites: 6

– Kurtushibinsky: 7 – dunites, 8 – harzburgites; 9 – Agardag: 10 – dunites, 11 – harzburgites, 12 – wehrlites; 13 – Ulor: 14 – dunites, 15 – wehrlites; 16 – Karashat, dunites; 17 – trend of compositional alterations of minerals from ultrabasic rocks of cumulative complex of the Dzhargalantui