Journal
SCIENCE
Volume 303, Issue 5659, Pages 830-832Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1093245
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Temperature, pressure, and time have been thought to control the smectite-to-illite (S-I) reaction, an important diagenetic process used for petroleum exploration. We demonstrated that microorganisms can promote the S-I reaction by dissolving smectite through reduction of structural Fe(III) at room temperature and 1 atmosphere within 14 days. This reaction typically requires conditions of 300degrees to 350degreesC, 100 megapascals, and 4 to 5 months in the absence of microbial activity. These results challenge the conventional concept of the S-I reaction and of reaction kinetic models.
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