ICDP continental drilling; IODP ocean drilling; Global carbon cycle; Organic geochemistry; Carbonate precipitation; Upper mantle rocks; Abiotic and biotic carbon; Atlantis Massif; Serpentinization; CO2 sequestration; Lost City; Deep biosphere; Mid-Atlantic Ridge; Oman
Labidi J., Young E.D., Giunta T., Kohl I.E., Seewald J., Tang H., Lilley M.D., Früh-Green G.L. (2020), Methane thermometry in deep-sea hydrothermal systems: Evidence for re-ordering of doubly-substituted isotopologues during fluid cooling, in Geochimica et Cosmochimica Acta
, 288, 248-261.
Motamedi Shahrzad, Orcutt Beth N., Früh-Green Gretchen L., Twing Katrina I., Pendleton H. Lizethe, Brazelton William J. (2020), Microbial Residents of the Atlantis Massif’s Shallow Serpentinite Subsurface, in Applied and Environmental Microbiology
, 86(11), e00356-20.
McCaig Andrew M., Früh-Green Gretchen L., Kelemen Peter, Teagle Damon A. H. (2020), Serpentinite in the Earth system, in Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
, 378(2165), 20190332-20190332.
Akizawa Norikatsu, Früh-Green Gretchen L., Tamura Akihiro, Tamura Chiori, Morishita Tomoaki (2020), Compositional heterogeneity and melt transport in mantle beneath Mid-Atlantic Ridge constrained by peridotite, dunite, and wehrlite from Atlantis Massif, in Lithos
, 354-355, 105364-105364.
Rouméjon Stéphane, Andreani Muriel, Früh-Green Gretchen L. (2019), Antigorite crystallization during oceanic retrograde serpentinization of abyssal peridotites, in Contributions to Mineralogy and Petrology
, 174(7), 60-60.
Fruh-Green Gretchen, Orcutt Beth (2019), In Search of Life Under the Seafloor, in Eos
, 100, 31-35.
Lang Susan Q., Früh-Green Gretchen L., Bernasconi Stefano M., Brazelton William J., Schrenk Matthew O., McGonigle Julia M. (2018), Deeply-sourced formate fuels sulfate reducers but not methanogens at Lost City hydrothermal field, in Scientific Reports
, 8(1), 755-755.
Rouméjon Stéphane, Williams Morgan J., Früh-Green Gretchen L. (2018), In-situ oxygen isotope analyses in serpentine minerals: Constraints on serpentinization during tectonic exhumation at slow- and ultraslow-spreading ridges, in Lithos
, 323, 156-173.
Früh-Green Gretchen L., Orcutt Beth N., Rouméjon Stéphane, Lilley Marvin D., Morono Yuki, Cotterill Carol, Green Sophie, Escartin Javier, John Barbara E., McCaig Andrew M., Cannat Mathilde, Ménez Bénédicte, Schwarzenbach Esther M., Williams Morgan J., Morgan Sally, Lang Susan Q., Schrenk Matthew O., Brazelton William J., Akizawa Norikatsu, Boschi Chiara, Dunkel Kristina G., Quéméneur Marianne, Whattam Scott A., Mayhew Lisa, et al. (2018), Magmatism, serpentinization and life: Insights through drilling the Atlantis Massif (IODP Expedition 357), in Lithos
, 323, 137-155.
Liebmann J., Schwarzenbach E. M., Früh‐Green G. L., Boschi C., Rouméjon S., Strauss H., Wiechert U., John T. (2018), Tracking Water‐Rock Interaction at the Atlantis Massif (MAR, 30°N) Using Sulfur Geochemistry, in Geochemistry, Geophysics, Geosystems
, 19(11), 4561-4583.
Rouméjon Stéphane, Früh-Green Gretchen L, Orcutt Beth N (2018), Alteration Heterogeneities in Peridotites Exhumed on the Southern Wall of the Atlantis Massif (IODP Expedition 357), in Journal of Petrology
, 59(7), 1329-1358.
Orcutt Beth N., Bergenthal Markus, Freudenthal Tim, Smith David, Lilley Marvin D., Schnieders Luzie, Green Sophie, Früh-Green Gretchen L. (2017), Contamination tracer testing with seabed drills: IODP Expedition 357, in Scientific Drilling
, 23, 39-46.
Szitkar Florent, Tivey Maurice A., Kelley Deborah S., Karson Jeffrey A., Früh-Green Gretchen L., Denny Alden R. (2017), Magnetic exploration of a low-temperature ultramafic-hosted hydrothermal site (Lost City, 30°N, MAR), in Earth and Planetary Science Letters
, 461, 40-45.
Früh-Green G.L., Orcutt B.N., Green S.L., Cotterill C. (2017), Atlantis Massif Serpentinization and Life. Proceedings of the International Ocean Discovery Program, 357
, International Ocean Discovery Program, College Station, TX, USA.
Früh-Green G.L., Orcutt B.N., Green S.L., Cotterill C. (2017), Atlantis Massif Serpentinization and Life: Proceedings of the International Ocean Discovery Program, 357
, International Ocean Discovery Program, College Station, TX.
Brazelton William J., Thornton Christopher N., Hyer Alex, Twing Katrina I., Longino August A., Lang Susan Q., Lilley Marvin D., Früh-Green Gretchen L., Schrenk Matthew O. (2017), Metagenomic identification of active methanogens and methanotrophs in serpentinite springs of the Voltri Massif, Italy, in PeerJ
, 5, e2945-e2945.
This project will take advantage of opportunities to participate in two exciting scientific drilling projects that target active hydration (serpentinization) and carbonation processes in upper mantle rocks: (1) IODP Expedition 357 to the Atlantis Massif at the Mid-Atlantic Ridge 30°N, with G. Bernasconi Früh-Green as invited Co-chief Scientist; and (2) drilling on land in the Samail Ophiolite as part of the ICDP Oman Drilling Project. The interaction of oxidized surface waters (seawater, ground water) with olivine and pyroxene in mantle peridotites is a fundamental process that results in extreme chemical conditions that affect the speciation and cycling of carbon in a number of ways. Serpentinization reactions lead to highly reducing conditions and the abiotic production of hydrogen and methane as well as other forms of reduced carbon, which provide possible sources of energy to fuel microbial life in the absence of sunlight. The alteration of mantle rocks exposed on the seafloor and on land also produces highly alkaline waters, which trigger the uptake of CO2 and deposit carbonate when mixed with seawater or groundwater. Serpentinites are thus an important reservoir for carbon in the form of carbonate minerals as well as abiotically and biotically produced organic carbon, all of which can survive in ancient mantle domains for hundreds of millions of years. We will combine microstructural, mineralogical and state-of-the-art geochemical, isotopic and spectroscopic methods to evaluate how fluid flow paths, microfractures and permeability networks evolve with time and to investigate the origin, distribution and cycling of carbon during serpentinization in the two distinct environments: the Atlantis Massif in the Atlantic Ocean and the Samail Ophiolite in Oman. Ultimately we aim to better understand how, when, and where the formation of abiotic vs biotic carbon compounds is favoured in serpentinizing environments. We will address fundamental questions, such as: What are the dominant carbon-bearing phases and the nature of reduced carbon in serpentinites in these two tectonically distinct environments? What are the rates of carbon fixation (as biomass, solid reduced carbon, or carbonate) in ultramafic rocks during low temperature hydrothermal alteration and weathering? How can we distinguish abiotic from biotic carbon in serpentinites? What are the roles of serpentinization in carbon sequestration and H2-generating reactions in the formation and cycling of abiotic and/or biotic carbon? How do these processes vary between marine and meteoric systems, and how can carbonation and CO2 sequestration be quantified in natural systems?