The origin, source, and cycling of methane in deep crystalline rock biosphere

R Kietäväinen, L Purkamo - Frontiers in microbiology, 2015 - frontiersin.org
The emerging interest in using stable bedrock formations for industrial purposes, eg, nuclear
waste disposal, has increased the need for understanding microbiological and geochemical …

The role of anaerobic fungi in fundamental biogeochemical cycles in the deep biosphere

H Drake, M Ivarsson - Fungal Biology Reviews, 2018 - Elsevier
A major part of the biologic activity on Earth is hidden underneath our feet in an environment
coined the deep biosphere which stretches several kilometers down into the bedrock. The …

Taxonomically and functionally diverse microbial communities in deep crystalline rocks of the Fennoscandian shield

M Nyyssönen, J Hultman, L Ahonen… - The ISME …, 2014 - academic.oup.com
Microbial life in the nutrient-limited and low-permeability continental crystalline crust is
abundant but remains relatively unexplored. Using high-throughput sequencing to assess …

Drilling and sampling a natural CO2 reservoir: Implications for fluid flow and CO2-fluid–rock reactions during CO2 migration through the overburden

N Kampman, MJ Bickle, A Maskell, HJ Chapman… - Chemical …, 2014 - Elsevier
This paper presents the initial results of a scientific drilling project to recover core and
pressurized fluid samples from a natural CO 2 reservoir, near the town of Green River, Utah …

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

O Warr, CJ Ballentine, TC Onstott, DM Nisson… - Nature …, 2022 - nature.com
Deep within the Precambrian basement rocks of the Earth, groundwaters can sustain
subsurface microbial communities, and are targets of investigation both for geologic storage …

The role of low-temperature 18O exchange in the isotopic evolution of deep subsurface fluids

O Warr, T Giunta, TC Onstott, TL Kieft, RL Harris… - Chemical …, 2021 - Elsevier
Abstract Ca-Na-Cl fluids with high concentrations of dissolved reduced gases reside within
fractures in crystalline Precambrian rocks around the world, and have been most intensively …

Microbial co-occurrence patterns in deep Precambrian bedrock fracture fluids

L Purkamo, M Bomberg, R Kietäväinen… - …, 2016 - bg.copernicus.org
The bacterial and archaeal community composition and the possible carbon assimilation
processes and energy sources of microbial communities in oligotrophic, deep, crystalline …

Hydrogeochemical and isotopic signatures elucidate deep subsurface hypersaline brine formation through radiolysis driven water-rock interaction

DM Nisson, TL Kieft, H Drake, O Warr, BS Lollar… - … et Cosmochimica Acta, 2023 - Elsevier
Geochemical and isotopic fluid signatures from a 2.9–3.2 km deep, 45–55° C temperature,
hypersaline brine from Moab Khotsong gold and uranium mine in the Witwatersrand Basin …

Epilithic microbial community functionality in deep oligotrophic continental bedrock

M Nuppunen-Puputti, R Kietäväinen, M Raulio… - Frontiers in …, 2022 - frontiersin.org
The deep terrestrial biosphere hosts vast sessile rock surface communities and biofilms, but
thus far, mostly planktic communities have been studied. We enriched deep subsurface …

Geomicrobiology and metagenomics of terrestrial deep subsurface microbiomes

M Itävaara, H Salavirta, K Marjamaa… - Advances in applied …, 2016 - Elsevier
Fractures in the deep subsurface of Earth's crust are inhabited by diverse microbial
communities that participate in biogeochemical cycles of the Earth. Life on Earth, which …