This paper analyzed the activity of coal-based metakaolin and non-coal-based (ordinary metakaolin) commonly used in Chinese market. The content kaolin was detected by XPF. phases kaolin, corresponding alkali-excited reactants were XRD. contents Al (IV), (V) (VI) 27Al NMR. micromorphology observed SEM. water-resistance alkali-activated tested immersion experiment. results showed that a lot corun...

The study is focused on metapelitic granulites of Cape Kaltygei (Western Baikal region) that contain a diagnostic mineral assemblage ultrahigh temperature (UHT) metamorphic rocks (orthopyroxene+sillimanite+quartz). pseudosection-based thermobarometry yields peak and pressure values (T=950 °C, P=~9 kbar) suggests near-isobaric cooling (IBC) conditions during the retrograde evolution granulites. ...

Abstract We report here the evidence of protracted metamorphic evolution orthopyroxene-sillimanite granulite culminating in UHT metamorphism within Paleoproterozoic complex Angara-Kan block (SW Siberian craton). The Opx-Sil granulites were formed during (T = 1070–1100 °C and P = 9 kbar) at ca. 1.8 Ga which was followed by retrograde isobaric cooling down to temperature around 900–950 °C. At 1.7...

The relations between Barrovian- and Buchan-type metamorphic series in the Chinese Altai remain obscure, hence a representative region of central part was investigated to address this issue, using combined microstructural, petrological geochronological methods. In region, Barrovian-type garnet, staurolite, kyanite sillimanite zones are locally overprinted by andalusite- cordierite-bearing domai...