Microorganisms from deep, high temperature sandstones: constraints on microbial colonization

Enzymes from Deep-sea Microorganisms

Enzymes from Deep-sea Microorganisms

Influence of temperature on brittle creep in sandstones

[1] The characterization of time-dependent brittle creep, promoted by chemically active pore fluids, is fundamental to our understanding of the long-term evolution and dynamics of the Earth’s crust. Here we report results from a study of the influence of temperature on both short-term strength and time-dependent brittle creep in three sandstones under triaxial stress conditions. We show that an...

Microbial biogeography: putting microorganisms on the map

| We review the biogeography of microorganisms in light of the biogeography of macroorganisms. A large body of research supports the idea that free-living microbial taxa exhibit biogeographic patterns. Current evidence confirms that, as proposed by the Baas-Becking hypothesis, ‘the environment selects’ and is, in part, responsible for spatial variation in microbial diversity. However, recent st...

Updated Results from Deep Trek High Temperature Electronics Development Programs

Electronics are used in modern oil and gas exploration to collect, log, and/or process data such as heading and inclination, weight on the bit, vibration, seismic/acoustic response, temperature, pressure, radiation, and resistivity of the strata. High-temperature electronics are needed that can reliably operate in deep-well conditions (up to 250°C). The U.S. Department of Energy Deep Trek progr...