The original high-temperature granite was altered to form the low-temperature clay minerals and limonite; there are consequently two distinct assemblages present in the rock: the high-temperature orthoclase-albite-quartz-biotite assemblage and the low-temperature assemblage of clay minerals and limonite.
The effect of ZnO content and sintering temperature on phase assemblage, densification and microstructural evolution has been investigated.
In addition, a sensitivity analysis was conducted with respect to cation exchange capacity, selectivity coefficient, mineral assemblage, temperature, and ionic strength.
The small vertebrates of the Cueva del Conde Mousterian and Aurignacian levels suggest a climate that differed from modern day temperatures, between −1.1 and −4.4 °C (mean annual temperature), placing these assemblages during Interstadials 9 to 7 (Is9 to 7).
The possible occurrence and persistence of amino acids in hydrothermal fluids thus depends at least on redox conditions, mineral assemblages, temperature, and pressure.
The climate of Africa has been affected by oscillations in global temperature and species assemblages in tropical Africa are often influenced by these changes, particularly the Last Glacial Maximum (LGM) [ 25].
Open image in new window Fig. 13 Reaction path of MgH2 + 0.25AlH3 showing the phase assemblage with temperature.
Sample incubations were held to 24 h at in situ temperature to minimize bacterial assemblage change, and evolved CO2 was captured on NaOH-soaked filter papers.
The responses of sensitive assemblages are temperature dependent, which could indicate temperature departures.
The assemblage-based temperature of core DGKS9603 (middle OT) was reconstructed using the MAT (Fig. 4g) (Li et al. 2001).
In both cases the maximum concentration would be 10-10-10-11 M HCN in an environment buffered by the fayalite-magnetite-quartz (FMQ) mineral buffer assemblage at temperatures of 250-400°C 250-400°C
