Mineralization calculation

Figure 3. Plot of 10 1nP56/54 values versus 10 /7 (K) for (A) Fe minerals calculated from Polyakov and Mineev (2000), and for (B) aqueous Fe species calculated from Schauble et al. (2001). Temperature scale in °C shown at top. Mineral abbreviations are Py pyrite, Mt magnetite, Celad celadonite, Hem hematite, Goe goethite, Lepid lepidocrocite, 01 olivine, Sid siderite, Ank-2 ankerite (Cai iMg ,jFe ,3Mn ,i(C03)2), Ank-1 ankerite (CaiMgo,5Feo,5(C03)2).

Fig.27 shows the compositions of the octahedral sheets of the low-temperature dioctahedral and trioctahedral clay minerals calculated in the basis of R3+, Mg, Fe2+ +... 

Plants. No parent compound was detected in any plant fraction Soil. Thoroughly degraded and mineralized Calculated half-lives were in the range of a few days and several weeks, respectively. Immobile... 

Arrays which must be increased in size when species are added are now automatically adjustable in dimension merely by supplying appropriate input data. The results of solute and mineral calculations will not appear if the activity or activity product, respectively, has not been calculated. This eliminates extraneous non-information and shortens the listing considerably, an advantage especially when a simple laboratory solution is considered and/or a low-speed remote computer terminal is utilized. 

The former presence of Be was extended to another important class of refractory objects, hibonite from the CM2 Murchison meteorite (Marhas et al., 2002). Hibonite [CaAli2-2 c(Mg cTi c)Oi9] is one of the most refractory minerals calculated to condense from a gas of solar composition, and is known to host numerous isotopic anomalies, especially in the heavy isotopes of calcium and titanium (Ireland et al., 1985 Zinner et al., 1986 Fahey et al., 1987). Curiously, when these anomalies are of an exceptionally large magnitude (in the several to 10% range), the hibonite grains show a distinct lack of evidence for having formed with Al (e.g., Ireland, 1988,1990) or Ca (Sahijpal etal, 1998,... 

Then, the percentages are summed and normalized to 100%. The purpose for these adjustments is to make the normative mineral calculation for the rocks. 

A normative mineral calculation - or norm - is a casting of a rock analysis into a hypothetical assemblage of standard minerals (12-14). The norm should be distinguished from the mineral assemblage that is actually present which is termed the mode. Some simplifications are used to calculate a norm (12). The important assumptions for this paper are that anhydrous conditions prevail so no hydrous phases are formed and that ferromagnesium minerals are free of Al2(>3 and all the Al2(>3 goes to feldspars. Although a norm calculation is hypothetical, it often shows a close... 

The following OH release data were obtained for a number of different minerals, calculated from the rise in pH that results when the mineral is immersed in a 0.85 M NaF solution (data from Perrott et al, 1976). 

Fig. 8.34 Unit block of three packages at constant stress amplitude used in a Miner-calculation...

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