...Peter J. Pollard; Ekaterina Pelenkova; Ryan Mathur Abstract The Ak-Sug porphyry Cu-Au-Mo deposit is situated within the Altai Sayan region that forms part of the Tuva-Mongol arc of the Central Asian orogenic belt. The Ak-Sug intrusive complex is made up of a series of nested intrusions, including...

... is established. Analysis of the composition of the deposits suggests that in the Ordovician, the Ak-Sug zone of West Sayan belonged to one of the blocks of the Tuva-Mongolian microcontinent and was separated from other blocks, including the block containing the Tuva paleobasin. In the context of modern...

...Fig. 4. Schematic geological map of the Ak-Sug gold-bearing porphyry Cu–Mo deposit, compiled after Dobryanskii et al. ( 1992 ). 1 , Quaternary deposits; 2 , 3 , Devonian deposits: 2 , rhyolite–dacite and rhyolite porphyry; 3 , sandstones and conglomerates; Ak-Sug Group rocks ( 4–10 ): 4...

... ). Similar sand-clay-silt rhythms heavily deformed by slope processes are exposed 200 m upstream the Ak-Sug Creek, in a neighbor landslide cirque (51°51′41.9″ N, 96°46′46.7″ E). Glaciofluvial facies (Geological Mapping, 2009 , 2015 ) are deposited by meltwaters released by degrading large ice sheets...

...Chondrite- and primitive-mantle-normalized ( McDonough and Sun, 1995 ) REE and trace element patterns of igneous rocks from the Ak-sug deposit. a , Gabbroids from the Aksug pluton and Khoito-Oka complex, b , pyroxene–amphibole diorites from the Aksug pluton, c , amphibole diorites from the Aksug...

... (Shandal-Oi and Lower Kadyr-Os) and nitrogen-rich water from a blowing well at the Ak-Sug copper deposit (Nos. 30, 32 and 29, respectively). The analyses show lower R values from 97 to 255 × 10 –8 (165 × 10 –8 on average), at 98.0 and 96.5 vol.% CO 2 in the two carbonate springs, with–6.4 and –8.1...

..., Mazhalyk massif—484 ± 2 Ma, Shui massif—449 ± 4 Ma, and other small massifs of the Kaa-Khem batholith as well as the Ak-Sug deposit of the Khamsara batholith—497 ± 1 Ma ( Table 1 and inset B in Fig. 1 ). The Ak-Sug gabbroids were presumably the major source of heat (and, possibly, matter), which...

... and 120 m in borehole 6 and between 160 and 250 m in borehole 7, and obtained g = 23 mK/m. Both boreholes stripped gray fine granite. No core samples from the site being available, we used thermal conductivity data from the Ak-Sug site ( Fotiadi, 1987 ) located 10 km east of Aryskan where average...

... – Yenisei, 5 – Gremyachka, 6 – Sabinka, 7 – Tanzybey, 8 – Oya, 9 – Vorobyevka, 10 – Lake Oyskoye, 11 – Ostraya Sopka, 12 – Kopenka, 13 – Kolganka, 14 – Ona, 15 – Oreshnoye, 16 – Dzhoy, 17 – Ust’–Kaila, 18 – Syzyn, 19 – Ak-Taskyl, 20 – Shignet (Uzun-Sug), 21 – Ryaboy Taskyl, 22 – Bol’shaya Ona, 23 – Baygul...

.... these interludes the aeolian activity ceased and redistribution of lime and gypsum, formation of colluvial deposits on the piedmont ACKNOWLEDGEMENTS plains occurred. Interestingly, Allchin et al AKS acknowledges an· equipment grant (1978) based on decalcification and redden- from the Ford Foundation, India for aug...

... fluids controls the temperatures and pressures at which phase separation occurs during fluid evolution. In addition to molybdenite forming with quartz in B veins, molybdenite occurs along hairline fractures in porphyry copper deposits such as Ak-Sug in Russia ( Pollard et al., 2017 ), Bagdad...

.... DAVIS, J.c., 1986. Statistics and data analysis in geology. John Wiley, N. Y., 646p. DUNN, JA., 1937. Mineral deposits of Eastern Singhbhum and surrounding areas. Mem. Geol. SU1'V.lnd., v. 69(1), pp. 1-183. DUNN, J.A and DEY, AK, 1942. Geology and petrology ofEastern Singhbhum and surrounding areas. Mem...

... stability and the interpretation of zircon U–Pb ages . Contrib. Mineral Petrol . 132 ( 3 ), 288 – 299 . Pollard , P.J. , Pelenkova , E. , Mathur , R. , 2017 . Paragenesis and Re–Os molybdenite age of Cambrian Ak-Sug porphyry Cu–Au–Mo deposit...

... upward into ripple cross-lamination (probably of turbidity current origin). There is no evidence of fairweather (tidal or longshore) currents, nor for reworking of the sands once they were emplaced into the basin. The depositional site at Garrington and Caroline lay at least 100 km offshore...

... (1995). Even minor changes in the relief of a depositional surface can have a pronounced effect on a carbonate nvironment. The importance of paleobathymetry on reef distribution is well established from studies of modem carbonates around the world. Specific to a particular tectonic setting, antecedent...