‘Follow the Water’: Hydrogeochemical Constraints on Microbial Investigations 2.4 km Below Surface at the Kidd Creek Deep Fluid and Deep Life Observatory

  title={‘Follow the Water’: Hydrogeochemical Constraints on Microbial Investigations 2.4 km Below Surface at the Kidd Creek Deep Fluid and Deep Life Observatory},
  author={Garnet S. Lollar and Oliver Warr and J. Telling and Magdalena R. Osburn and Barbara Sherwood Lollar},
  journal={Geomicrobiology Journal},
  pages={859 - 872}
Abstract Microbiological and geochemical data are presented to characterize the hydrogeochemistry and to investigate extant microbial life in fracture waters 2.4 km below surface, at the Kidd Creek Observatory in Canada. Previous studies identified the world’s oldest groundwaters with mean residence times on the order of millions to billions of years trapped in fractures in Precambrian host rock here. In this study, major ion chemistry, δ18O and δ2H isotopic signatures and dissolved gases in… 

In Situ Growth of Halophilic Bacteria in Saline Fracture Fluids from 2.4 km below Surface in the Deep Canadian Shield

This work demonstrates that anaerobic bacteria and known halophilic taxa are present and viable in the fracture waters presently outflowing from existing boreholes, and complements ongoing efforts to describe the microbial diversity in fracture waters at Kidd Creek in order to better understand the processes shaping life in the deep terrestrial subsurface.

Water and Rock Chemistry Inform Our Understanding of the Deep Biosphere: Case Study in an Archaean Banded Iron Formation

Research into the deep biosphere requires an understanding of both the microbial community at a given site and the geochemical and hydrological factors that support that microbial community. To

Tracking the Deep Biosphere through Time

The oceanic and continental lithosphere constitutes Earth’s largest microbial habitat, yet it is scarcely investigated and not well understood. The physical and chemical properties here are

Spatial and Temporal Constraints on the Composition of Microbial Communities in Subsurface Boreholes of the Edgar Experimental Mine

Results indicate microbial community composition in the near-subsurface is highly dynamic at very fine spatial scales within fluid-rock equilibrated boreholes, which additionally supports the role of a relationship for surface geochemical processes infiltrating and influencing subsurface environments.

86Kr excess and other noble gases identify a billion-year-old radiogenically-enriched groundwater system

Deep within the Precambrian basement rocks of the Earth, groundwaters can sustain subsurface microbial communities, and are targets of investigation both for geologic storage of carbon and/or nuclear

Hydrogen and dark oxygen drive microbial productivity in diverse groundwater ecosystems

Groundwater ecosystems are globally wide-spread yet still poorly understood. We investigated the age, aqueous geochemistry, and microbiology of 138 groundwater samples from 87 monitoring wells (<250m

Dissolved Microbial Methane in the Deep Crystalline Crust Fluids–Current Knowledge and Future Prospects

Methane is a powerful greenhouse gas, of which most is produced by microorganisms in a process called methanogenesis. One environment where methanogenic microorganisms occur is the deep biosphere.



Sulfur mass-independent fractionation in subsurface fracture waters indicates a long-standing sulfur cycle in Precambrian rocks

It is demonstrated that this sulfate most likely originates from oxidation of sulfide minerals in the Archaean host rocks through the action of dissolved oxidants themselves derived from radiolysis of water, thereby providing a coherent long-term mechanism capable of supplying both an essential electron donor (H2) and a complementary acceptor (sulfate) for the deep biosphere.

Bioenergetic Constraints on Microbial Hydrogen Utilization in Precambrian Deep Crustal Fracture Fluids

ABSTRACT Precambrian Shield rocks host the oldest fracture fluids on Earth, with residence times up to a billion years or more. Water–rock reactions in these fracture systems over geological time

Tracing ancient hydrogeological fracture network age and compartmentalisation using noble gases

Unravelling abiogenic and biogenic sources of methane in the Earth's deep subsurface

The Origin and Age of Biogeochemical Trends in Deep Fracture Water of the Witwatersrand Basin, South Africa

Water residing within crustal fractures encountered during mining at depths greater than 500 meters in the Witwatersrand basin of South Africa represents a mixture of paleo-meteoric water and 2.0–2.3

Variations in microbial carbon sources and cycling in the deep continental subsurface

Exploration of deep intraterrestrial microbial life: current perspectives.

Hydrogen, methane and carbon dioxide gases are continuously generated in the interior of the authors' planet and probably constitute sustainable sources of carbon and energy for deep intraterrestrial biosphere ecosystems.

Deep fracture fluids isolated in the crust since the Precambrian era

Together, the different noble gases show that ancient pockets of water can survive the crustal fracturing process and remain in the crust for billions of years.