Results 51 to 60 of about 4,448 (271)

Isotopic Fractionation Associated With Sulfate Import and Activation by Desulfovibrio vulgaris str. Hildenborough

Frontiers in Microbiology, 2020
The use of stable isotopes to trace biogeochemical sulfur cycling relies on an understanding of how isotopic fractionation is imposed by metabolic networks.
Derek A. Smith, David A. Fike, David T. Johnston, Alexander S. Bradley, Alexander S. Bradley   +4 more
doaj   +1 more source

Fractionated sulfur isotopes in sulfides of the Kaidun meteorite [PDF]

Meteoritics & Planetary Science, 1997
Abstract— The Kaidun meteorite contains carbonaceous chondrite (CM1) clasts that have been highly altered by reactions with hydrothermal fluids. Pyrrhotite in these clasts occurs as unusual needles wrapped by sheaths of phyllosilicate, and pentlandite forms veins that crosscut aggregates of phyllosilicate and garnet but not pyrrhotite.
Harry Y. McSWEEN, Lee R. RICIPUTI, Bruce A. PATERSON   +2 more
openaire   +1 more source

Oxygen Isotopes and Volatiles in Martian Meteorite [PDF]

, 2013
Oxygen isotopes were measured in mineral separates from martian meteorites using laser fluorination and were found to be remarkably uniform in both δ18O and Δ17O, suggesting that martian magmas did not assimilate aqueously altered crust regardless of any
Channon, Melanie Beth
core   +1 more source

Atmospheric sulfur is recycled to the crystalline continental crust during supercontinent formation

Nature Communications, 2018
The long-term evolution of the sulfur budget in the lithosphere is poorly constrained. Here, using mass independent isotope fractionation as an indelible tracer, the authors track the pathway of sulfur from the Earth’s surface to punctuated episodes of ...
Crystal LaFlamme, Marco L. Fiorentini, Mark D. Lindsay, Thi Hao Bui   +3 more
doaj   +1 more source

Modeling the signature of sulfur mass-independent fractionation produced in the Archean atmosphere

, 2014
Minor sulfur isotope anomalies indicate the absence of O2 from the Archean atmosphere. A rich dataset showing large variations in magnitude and sign of Δ33S and Δ36S, preserved in both sulfates and sulfides, suggests that further constraints on Archean ...
Claire, Mark, Meadows, Victoria, Domagal-Goldman, Shawn D., Stueken, Eva, Claire, Mark W., Domagal-Goldman, Shawn, Kasting, James F., Stüeken, Eva E., Meadows, Victoria S., Kasting, James, Buick, Roger   +10 more
core   +1 more source

Sulfur isotope rations of sulfide minerals from the deposit of the Tsuchikura mine, Shiga Prafecture, Japan

, 1998
Sulfur isotope rations of sulfide minerals in the ore specimens from the deposit of the Tsuchikura mine are distrib-uted in a range from -0.8 to 5.4%, mostly from +0.5 to 3.0%, close to the previous data (from +1 to +3%) by Miyake and Sasaki (1980).
Harada, Kaori, Yamamoto, Masahiro, Kase, Katsuo   +2 more
core   +1 more source

The use of radiocarbon to evaluate the trophic role of geothermal bacteria in shallow hydrothermal water ecosystem

Ecological Indicators, 2023
Stable isotopes such as δ13C and δ15N are routinely used in trophic ecology as isotope values are derived from diet and recorded subsequent fractionation in consumer tissue.
Pierre-Yves Pascal, Hidetaka Nomaki, Yosuke Miyairi, Yusuke Yokoyama   +3 more
doaj   +1 more source

Carbon allocation and carbon isotope fluxes in the plant-soil-atmosphere continuum: a review [PDF]

, 2011
The terrestrial carbon (C) cycle has received increasing interest over the past few decades, however, there is still a lack of understanding of the fate of newly assimilated C allocated within plants and to the soil, stored within ecosystems and lost to ...
Gomez-Casanovas, N, Esperschütz, J., A. Knohl, S. Palacio, Brugnoli, E., Uchida, Y., M. Barthel, Bahn, Michael, Boeckx, P., Brüggemann, N., Badeck, Franz Werner, Gessler, Arthur; id_orcid, Kayler, Z, Barthel, Matti, Palacio, S., J. Esperschütz, Gavrichkova, O, Ghashghaie, Jaleh, F. Badeck, Salmon, Yann, Palacio, Sara, J. Ghashghaie, Barthel, M, N. Gomez-Casanovas, Salmon, Y., Gomez-Casanovas, Nuria, Buchmann, N, Badeck, F, Y. Salmon, Boeckx, Pascal, Barthel, M., Ghashghaie, J., Badeck, F., Esperschütz, J, Palacio, S, Brueggemann, N., A. Gessler, Y. Uchida, Gavrichkova, O., Keel, SG, M. Bahn, Keitel, C, Knohl, A, E. Brugnoli, Uchida, Y, Kuptz, Daniel, O. Gavrichkova, Kayler, Z., Knohl, A., Kuptz, D, Brugnoli, Enrico, Brüggemann, N, Brugnoli, E, Z. Kayler, Uchida, Yoshitaka, Keel, Sonjagisela, D. Kuptz, Keitel, C., Bahn, M, Knohl, Alexander, Keel, S. G., Buchmann, Nina; id_orcid, Gessler, A., Keitel, Claudia, Kayler, Zachary E., C. Keitel, Salmon, Y, Kuptz, D., Esperschütz, Jürgen, N. Brüggemann, Keel, S.G., Gomez-Casanovas, N., P. Boeckx, Gessler, A, S. G. Keel, Esperschuetz, J., Brüggemann, Nicolas, Gavrichkova, Olga, Buchmann, N., N. Buchmann, Ghashghaie, J, Keel, S., Bahn, M.   +82 more
core   +1 more source

Evidence for high-frequency oxygenation of Ediacaran shelf seafloor during early evolution of complex life

Communications Earth & Environment, 2023
Increasing oxygenation of the early Ediacaran Ocean is thought to have been responsible for the emergence of early animals. Although geochemical studies have suggested periods of oceanic oxygenation in the Ediacaran, direct evidence for seafloor ...
Liangxuan Jiao, Zhenbing She, Dominic Papineau, Chao Zhang, Thomas J. Algeo, Matthew S. Dodd, Genming Luo, Kenan Cao, Chao Li   +8 more
doaj   +1 more source

An Aquifer in the Deep Subsurface - Microbiology and Sulfur Isotope Fractionation

, 2001
Jan Detmers
openalex   +3 more sources