 | | Journal (article/letter/editorial) | | DOI: 10.3190/jgeosci.205 Original paper Astrophyllite–alkali amphibole rhyolite, an evidence of early...Orogenic Belt) at the Botgon bag, Mankhan Soum, Hovd District in Western Mongolia. The rock consists of...containing up to 1.94 wt. % ZrO2), tiny brown radial astrophyllite, annite and accessory zircon, ilmenite, fluorite...monazite, hematite, chevkinite and bastnäsite. Astrophyllite has unusual, highly ferroan composition and...and occurs as two sharply bound zones of astrophyllite I and II with the average empirical formulae: (K1 |  | | Journal (article/letter/editorial) | | rocks are relatively common in northern China and Mongolia (Gavrilova et al. 1975; Wang ZG et al. 1993; Litvinovsky...g o Hovd e et ult r Fa n lt f au li an Mongolia Khar-Us nuur Altai Zone Hovd Zone Bij Group ... A lt Mon 47°30' 92°00' “Lake District” lt Fau vd Ho o nuu M 48°00' 91°00' o Tolb 90°00'...GZ318, A GZ095A 92°16' b b fa de ep Munh-W Botgon ep ur 47°03' Mt. Munh Tsast 3984 m Ho a ...47°00' 0 Lake Zone Mankhan 0 c SW 92°17' GZ195 GZ279 5 km NE GZ298A/2 Botgon bag 47°07' c GZ298A/1 |
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