Kinetics of illite formation

Journal Article · Wed Sep 01 00:00:00 EDT 1976 · Geol. Soc. Am., Bull.; (United States)

DOI:https://doi.org/10.1130/0016-7606(1976)87<1326:KOIF>2.0.CO;2· OSTI ID:7333076

Eberl, D ^[1]; Hower, J

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1. Univ. of Illinois, Urbana

An activation energy of 19.6 +- 3.5 kcal/mole was found for conversion of synthetic beidellite with the composition Al/sub 2/Si/sub 3/./sub 66/Al/sub 0/./sub 34/O/sub 10/(OH)/sub 2/K/sub 0/./sub 34/ to mixed-layer illite/smectite. The size of this activation energy and the rate constants suggest that (1) the alteration of smectite to illite during diagenesis involves the breaking of chemical bonds in the 2:1 layers; (2) either an equilibrium or a kinetic interpretation for the range of mixed layering found in burial diagenetic sequences is compatible with the kinetic data; and (3) the formation of illite from smectite on the ocean floor will not be seen, even if the reaction is favored thermodynamically, because the reaction rate is too slow.

• OSTI ID: 7333076
• Journal Information: Geol. Soc. Am., Bull.; (United States), Journal Name: Geol. Soc. Am., Bull.; (United States) Vol. 87:9; ISSN BUGMA
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
152003* -- Geothermal Data &amp; Theory-- Rock-Water-Gas Interactions
ACTIVATION ENERGY
CHEMICAL REACTIONS
CLAYS
DIAGENESIS
ENERGY
HIGH TEMPERATURE
HYDROTHERMAL SYNTHESIS
ILLITE
KINETICS
MINERALS
REACTION KINETICS
SYNTHESIS